What Are Low-E Coatings For Windows?
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- Опубликовано: 30 июн 2024
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Jeff explains Low-E coatings. What are they? What do they do? Do you need them?
Most new windows strive to meet energy-star guidelines for efficiency. Some windows do better than others and one of the main reasons is due to the presence of Low-E Coatings on the glass of the new windows and doors. Visit houstonwindowexperts.com/
In this video, we will discuss what Low-E coatings are, how they work and whether you should use them or not. We also discuss the difference between 0 coats of Low-E, 2 coats and 3 coats.
For more details, you can always visit our showroom in Houston Tx at 467 W 38th Street. Houston Window Experts sells and installs 20 major brands of windows and doors from the top brands in the USA. (Andersen, Pella, Marvin, Fleetwood, Simonton and many more).
#LowEmissivity #EnergyStar #HoustonWindowExperts 
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Great information that is explained in words that anyone can understand. The information about which part of the country you live in being important in the Low-E coating placement was new to me and most people I mentioned it to. Thanks!
Thank you for watching and your comments.
So with 3 low-e glass we Dracula no longer need to hide from the sun!
Exactly!
Lol good one.
😅🤣😂 nice one!
Very informative. I live in the UK which has a cold climate for most of the year and now I know the low e coating needs to be on the inner glass of the double glazed unit. 👍🏻
Glad it was helpful!
If so , what means, in low-e terminology, passive coating vs. solar coating ? Looks like lack of knowledge this guy presented
Good god this is informative. Thank you sooooo much. Its very hot and humid in the summer. About the longitude of Atlanta. So a concern I have is when that sun swings around to South/West and rooms start to sizzle. Its ok for my wifes Pilates class but otherwise..... on goes the air conditioners ....
Yikes! Did you end up making any decisions about new windows yet?
Very well explained. Thanks for posting.
Glad you enjoyed it! Thanks for watching.
Thanks Brother! Awesome Video
Glad you liked it!
Thanks a lot for the excellent explanation. It was great.
Thank you for watching
We need more window sales guys like you. I can't find a competent window person anywhere, and wished I had a guy like yourself in Indiana.
Jay, we may know somebody in your area. You can email her office and we can check our list. info@houstonwindowexperts.com
Have anyone good in Chicagoland?
Yes, please check out JeffsList.com
great info!! Thanks
Thank you for watching
Excellent video
Thank you very much!
excellent video
Thank you for watching
Awesome video.
I’m looking at Marvin windows and can’t decide if we should go with E2 or E3 in North Carolina.
Are you in the higher areas where it gets colder? If so, go with the E2.
Ty very helpful..
Thank you for watching
Hello there! Thank you so much for your videos. So helpful and I've learned so much and led me to Amsco to find exactly what I was looking for. We live in Texas, DFW area, and I'm concerned about the low-e coatings and losing bright sunlight. I hear you regarding compromise. I have heard from reviews that the Cardinal's 366 triple layer can leave a green hue in the room looking like a margarita. This concerns me. I have 13 picture windows, no blinds, all on the backside of my home with west sun that overlooks our back yard. We live on acreage and don't need blinds for privacy. I know I need that triple. I thought about going with the 270 double layer, but I heard that left a violet hue. True?
Regarding the SHGH, if I'm correct, I think there's only a .10 difference. Thoughts?
One of the beauties of our home is the backyard view to our pool and pond as well as the bright natural light. Such an investment and have sat on this decision for months. I read one review - a woman replaced her new triple layer because it blocked out so much of the bright light and went with clear. My husband would kill me. LOL. Thank you in advance!!!
If anyone reads this and has experience, PLEASE share experience with either 366 and 270.
If you are concerned about visible light transmission, the 270 would be a better option for you. All energy efficient glass will have a slight color but in direct sunlight it's barely noticeable.
thanks sir.....................
Cool!!!
Thank you for watching
Been looking into getting a new patio slide door and been seeing the ones that have blinds built in i know your based out in Texas but is there a company unwould recommend out here in Utah salt lake city ? I know we have amsco which is really close to where I live thanks for the info in this video
I'd contact Amsco. They will know someone locally for sure. Thanks
Outstanding video! Thank you. Is the low-e coating primarily effective on windows exposed to direct sunlight? Or would they be worth installing on north facing windows in South Florida that never experience direct sunlight?
Thanks for watching! Low-E coating reject heat, not visible light, so they are still effective in hot climates even if they are not in direct sunlight. There is some inherent reduction in light transmission from the coating but on a quality window it's minimal.
@@HoustonWindowExperts Thank you! Very helpful. I feel so much better informed on choosing windows after binge-watching your channel for several hours.
Very informative. Well done. Based on your info, here in San Antonio some of our Low-E windows seem to be showing signs of a bad silver oxide application. Clean window, but a type of shiny haze between the panes. I suspect there's nothing we can do about that correct? Short of having the entire panel replaced?
Thank you for watching. If indeed you have a failure, the only way to resolve that would be to replace the entire glass unit. Fortunately, you do not need to replace the frame, just the glass. It's likely that they are still under warranty. If you can find out who the manufacturer is, I would reach out to them to make a warranty claim.
@@HoustonWindowExperts Great advice. Thanks very much for sharing.
Very well explained.. Thanks. Can the glass be coated with the low-e coatings after being being installed? We have a fixed double glass ceiling (part oftheliving room).
Unfortunately that process requires specialized machinery that would require it be done at the glass plant.
There are solar reflective window films that you can apply afterwards. There are also videos here on YT that explain them.
Just watched this video....thanks again for another great, informative video....you mentioned doing another video covering the argon gas and other fill choices, did you ever do that? I don’t see one. I was just comparing glasses of the same window, and one has a U-value of .27(low E-argon)and the all the bells and whistles version(triple, low E, Krypton, foam filled)goes down to .16. Is it really worth the additional cost? What do these numbers equate to in utility bill savings? I should add, I am in Minnesota.
Hi, living in minnesota, u factor is critical. Some companies achieve it by what glass they use and others by having a wider frame. The wider the frame, the less glass you have. The less glass you have means your u factor will go lower.
@@HoustonWindowExperts but is .16 a huge difference than .27 in value? What do these numbers actually mean?
Great question. U factor tells us how well the window performs in cold climates. The lower the number, the better it works. If the cost difference between the two is more than 10%, it's probably not worth it.
Awesome videos!
What’s a mullion?
That's where two windows are joined together. Thanks for watching.
I live in the Dallas area, which is similar weather as in Houston, what most Low-E coating choice in the Houston area? single low-e, double or even tripple ? another thing is that multiple coating will impact visible transmitting rates as in your demo, I heard that double/trible coating glazing can only get 30% or lower VT, sounds like very dark inside the room(if use tint ratio as reference). By the way, do you do business for Dallas area? or you have recommended dealer or contractor?
Thank you for your question. I would stick to no more than three coats of low-e
Hi great video! What about 4 coat low E windows?
I think it's too dark. Might as well build a wall! Lol
Thank you for the video it was very helpful ❤️.
How long does the low e coating last ?
The low e coating should last forever. Argon gas will escape at about 1% per year.
@@HoustonWindowExperts Thanks
@@HoustonWindowExperts what are your thoughts about Kensington KHPP windows?
I do not know anything about them. I will have to look into this.
How do you differentiate the kind of low e glass used in cold places from the ones used in warmer places
I mentioned in the video about two coats versus three coats of low e. In Northern climates you will use two and place it in the opposite location than you would a Southern climate where you would use three. If you watch the video again you see where I elaborate on that.
Slightly tangential topic - I'm trying to decide between double and triple paned Pella vinyl windows for my bedrooms for street noise reduction. In your experience, have clients noticed a difference between double and triple pane for noise reduction? It costs about $225/window to upgrade to a triple from double (I have 6 windows total). Is it worth the upgrade?
Thank you so much for your videos! These are extremely helpful as I navigate new home ownership and windows.
Thank you for watching and your question. I'd ask them to give you the actual STC data to compare.
@@HoustonWindowExperts Thanks! It's 26 STC for double vs 28 STC for triple. The STC scale isn't linear (as far as I understand), so even though the difference is just 2 points, in reality it might be a bit more than that. Not sure - thoughts?
Colorado, hot blazing sun in summer, wind-driven single digit temps in winter, which to choose?
Check out EnergyStar.gov they have a map with recommendations based on location.
Which coating should we get in Oklahoma where we have both extremes? Aka the weather is bipolar.
I'd consult energystar.gov they will have a map showing the best option for your area. Thank you for watching.
Jeff,
To clarify a few minor details from the LowE presentation that are common misconceptions...
Softcoat or sputter LowE coatings (there are also "pyrolytic" or hardcoat LowE coatings the differences would be outside the scope of your video) are available in single, double, triple, and quadruple layer versions, not just two and three layers as mentioned in the video. The single, double, triple, quadruple layers in the coating description refers to the number of layers of silver in the coating, not the number of coatings on the glass surface. A single silver coating might have a half-dozen of more separate layers of metal and metallic oxides in the coating, while a triple silver coating might have more than a dozen layers, but in both cases it's the silver that is the reason that the coating works. The layers of other metals/oxides are there to support and protect the silver. And as an aside, sputter coating thickness is measured in angstroms, or how many layers of atoms thick.
Single-silver coatings are intended for high solar heat gain applications, so certainly not appropriate to your environment. Dual-silver coatings are intended for moderate solar heat gain applications, while triple and quad coatings are recommended for all environments due to having the lowest U-factors, but work especially well in cooling dominated climates because of their ability to block direct solar heat gain, as you pointed out.
As you also mentioned in the video placing the LowE coating on surface 3 does result in increased solar heat gain, while placing the coating on surface 2 will block more solar heat gain. However, single-silver coatings intended for high solar gain are designed and intended for surface 3 application, while dual, triple, and quad coatings are designed for surface 2 applications and are installed in the windows on surface 2 in the vast majority of windows no matter where they are being installed.
There are exceptions to the surface 2 rule for the multilayer coatings, primarily due to window manufacturer requirements (usually not involving solar gain considerations), but since the coatings are designed and intended for surface 2 application as installed, placing them on surface 3 will result in a noticeable color shift of the coating when viewing the window.
The different coated glass manufacturers use very different methods to designate or label their LowE coatings. Showing below four examples of Cardinal's coating designations since they are the easiest to understand among the different manufacturers and since Cardinal supplies well over half of all residential coated glass used in North America:
LoE-180 --- one silver layer and 80% visible light transmission --- high solar heat gain
LoE²-272 --- two silver layers and 72% visible light transmission --- moderate solar heat gain
LoE³-366 --- three layers of silver and 66% visible light transmission --- low solar heat gain
Quad LoE-452 --- four layers of silver and 52% visible light transmission --- low solar heat gain
Greg, thanks for sharing your wealth of knowledge on this subject. I agree with everything you are saying. I try to keep some of the details out of the videos due to length restrictions. Sometimes I get into the difference between passive low-e vs solar control low-e but I did not elaborate much this time due to time constraints. I may decide to do an in-depth video about this soon with a contact I have at Cardinal Glass. He is a genius on glass as a fenestration tool.
Thanks for taking the time to chime-in.
@@HoustonWindowExperts Thanks Jeff, I watched about a dozen of your videos this afternoon and really enjoyed how well you present so much information. I understand how you are limited to how much information that you can add in a video and stay within a reasonable timeframe and also that your emphasis has to be on window performance specific to your climate and potential customer base, so I did slant my reply a bit toward some of the questions that I saw in the comments section of this and other videos (and I am a geek).
I appreciate your input, thank you for sharing your thoughts.
Can you help me please? I'm switching from Amsco's low-e 366 to 270 to get more light through my windows. I need some help deciphering Anderson's glass options. I've chosen an Anderson A series door and want the glass to match the windows as much as possible. Can you tell me what Anderson glass option is comparable to Amsco's low-e 270? Is it their Low-E4 glass? My door proposal is with the Low=E4 SmartSun and I'm trying to get away from green/silver hue and get as much VLT as possible.
Thank you again!!
Andersen's Low-e 4 will probably be the closest thing. Their Passive Sun would also be close and serve you well if you're in a cold climate.
I live in Florida and for our homes people buy the hurricane impact windows for the hurricanes. The problem is the impact glass is on the inside and the very thin Low-E is on the outside. The Low-E offers no protection from storms. When inside the homes here knock on the glass and it sounds solid. Now go outside and knock on the glass and you will see how it gives no protection. The problem is the storms are on the outside where the impact glass needs to be.
The reason the impact glasses on the inside instead of the outside is because if the glass were to break on the outside it would likely hit the glass on the inside. If the glass on the inside is not strong it will fly everywhere and hurt people. The outside piece of glass is considered sacrificial.
I want the impact glass in the out side.
It means that during the winter it won't let much heat from the sun inside, right? But also won't let the heat out, so it's kinda making up for the heat reduction from direct sunlight.
Great question. Since Low-e coatings reject the passage of heat, in southern climates they are designed to keep heat out while in northern climates they are flipped to keep the home's heat inside. If you live in a hot climate Low-e is working for you in the warmer months while in colder climates they are serving you in the colder months.
Thanks for explaining. We’re having a custom 1800 sq ft single story house being built in Northeast Florida. Not sure we’re in a total trusting relationship with our builder. Nice to know there are some basic tests we could do to make sure we’re getting what we’re paying for. In an unrelated question, we’re paying around 10k for Low E. White Vinyl single hung non-impact windows. We asked to have a brown window instead of white and we were quoted an additional $5,000. Then we found out that only the outside was going to be brown. When we requested that the inside be brown too, that was an additional $6,000, more than doubling the cost to go from white to brown. Am I justified in feeling that we don’t have the most trusting relationship with our builder?
Steven,
Not know the specifics of what has been bid, I really can't speak definitively on this. I will say that going from a standard, white, vinyl to custom color inside and out you could see the price double. A standard color is the most cost effective.
Hi Steven. I own a glass company in AZ and my suppliers charge the exact same amount for White or Tan vinyl window. Custom colors they always refer me to costly alternative suppliers who’s costs are considerably more. I don’t know the margins in your particular area but it would of been best to search for competing price points from the start.
I'm in Minnesota. I did the lighter test to find out if I have low-e windows. Flame 3, inside looking out, was the odd duck. Does that mean the coating is on the inside of the outer pane of glass? Is that where it should be? You mentioned in your video that climate can determine where the coating should be located in the finished assembly. Is mine correct? Should I also worry about the one pane of one window which was backwards to all the rest by having the odd colored flame being #2 rather than #3?
We just came out of a week long stretch of -20F temps and had some serious ice formation. Should we be concerned?
Thanks for your video.
Hi, I've heard about the flame test but never tried it myself. I use a tool that reads the glass and tells me where the low-e is located and the number of coats.
Sorry I could not be of more help.
@@HoustonWindowExperts Are you able to try it and compare it to your method? I don't have the tool and really don't want to buy an "upgraded" window if it really isn't any better than what I have. I also would like to be fairly confident that.i know what I do have, is it correct, and is it installed correctly.
Thanks again.
If you know who you window manufacturer is, you could request they verify that the glass is installed correctly.
You could also contact a local glass company. They have those tools on every truck since they often have to verify what glass is in a window when they are needing to replace it.
QQ, what is the diff between Hard and Soft low E, and which one is better for south texas. Thank you
Thank you for watching and for your question. I am not aware of anyone who is using hard coatings any longer. Even if hard coatings were available, I can't think of what the benefit would be. The soft coating is protected by the second pane of glass and should last for at least 20 to 50 years. If you are in a hot climate, I would suggest a low e366
So, do the 2-coat windows have it on surfaces 2 and 3? What about the 3-coat? And I imagine the 2-coat windows look less green than 3 coat windows. Okay, last question. What about in temperate climates? Does it come down to whether your wife gets too hot in summer or too cold in winter on whether you put the coats on the inner or outer pane?
Great questions! Whether it's two or three coats, they all go on surface #2. In cold climates they typically place it on surface #3 to allow more solar heat gain into the home and reflect back the heat from the inside of the home.
I live in a part of the country where we have temperatures in the winter that can go to the teens and single digits, and then in the summer can be up to 100. Will it be best to have the coating on the front or the back pieces of glass? Thank you
On surface 3. (Inside pane).
Thank you very much for answering my question so quickly!
My window has screens covering the windows on the outside, if I have reflective window film added to the windows that already have traditional window screens how will the screens affect the overall performance of the reflective window film?
I cannot answer this question with confidence. However, I can't see how that would make much, if any difference, at all.
Please do the demo with the window reversed. There's a lot of uncertainty here as to just what effect low-e on surface #2 vs #3 has on heat transfer from without and from within, and more details are crucial. I have questions about it, but a demo could clear some uncertainty.
Is there a way to test if our Windows have LowE or Argon Gas? If you get new windows is there a way to confirm if they actually installed LowE?
There is a tool you can use. It's a spectrometer. It's quite easy to see and should be obvious. Place a sheet of white paper inside and look at it from the outside. It should look a little green.
What is your opinion on Simonton StormBreaker Plus windows? Thanks
I don't have much experience with that product because we don't install in hurricane zones. I've used it a couple of times and had good luck with it. The only thing I don't like is that you have to put screws in the sill if the windows for it to pass inspection and I've had a few leak after a few years. Be sure to over seal those screws as much as possible.
I’m up north. Should it be facing in words? I bought a house and it’s all on the inside.
It should be on surface three.
What do i do if i live where its half cold half hot.. where should the low e coating be.. and is ther any other solution instead of low e? I like the clear glass not greeny glass
That's a great question. I would guess that you could look at your heating versus cooling costs and pick the one that is hurting you the most. A really good window will do a great job of both hot and cold climates. I would lean toward the suggestion of your local window dealer. They've probably come across this question before.
When it comes to residential glass, I don't know of any options other than typical low-e coatings. There are some options using vacuum glass in commercial applications but I have not seen any in a residential window frame.
Unless your home is specifically designed to take advantage of solar heat gain as an energy source you are generally better off with using glass with the lowest U-factor that you can find regardless of the coating. But keeping in mind that the LowE coating with the best (lowest) U factor will also block the most solar hear gain as well.
Most people in northern heating-dominated climates are generally not very happy when standing in front of a window during the winter and not feeling any heat from the sun....it just feels wrong somehow even though the lower U factor window actually has better overall energy performance in most cases than the window that allows the solar heat through. Simply, solar heat feels good and we LIKE it. We don't like not feeling it when its cold outside.
With that in mind, in many cases the best option would be to use a moderate solar gain coating that will allow some solar gain in winter but limit some solar gain in summer, and in both seasons will limit ambient heat from passing through the glass all year around.
Moderate solar gain coatings will almost always be on surface 2, or the inside of the outside lite.
true that laminate glass blocks 99.9 rays off the sun? im changing my windows with double lammiate for sound and i cant have low e in double laminate.thanks
Sorry, I don't know... Maybe you can look at Cardinal's website.
Why can't you have low-e in the double laminate? Laminate is just in between individual glass panes within the actual insulated glass unit. You still have surface 2 or 3 available for the manufacturer, i.e. Cardinal to apply the low-e coating onto the glass.
I'm in eastern ks where I've seen 117 in the summer and down to -31 in the winter. With that in mind, what E coating should I have?
I would go with a glass package that is designed for what they call North Central. That is typically going to involve the Cardinal low e 272 glass package
@@HoustonWindowExperts Since I heat my home with a wood-aire fireplace and if it's too cold, I just throw another log on the fire so windows for a cold climate won't save me as much as ones for the summer when it's hot when my electric bill rises due to the AC running more. With this in mind, would you still suggest the Low w 272 glass package?
do i need Double glaze or low E if I want to fend off heat from west ☀ ☀
You need both.
Wondering if this would be appropriate as a treatment on bus windows for a skoolie conversion and how you would approach install of triple coat with argon gas considering the bus will experience both extremes of hot and cold as we travel across the U.S. Any tinting that appears in the glass is of no consideration to us.
I think traditional household glass would not survive in a motor vehicle. I have an RV myself that has insulated windows but they are made out of polycarbonate.
I would look into a product called Eurovision.
@@HoustonWindowExperts Many many thanks
You're welcome
Will it block wifi signals, EMF & RF radiation? if yes, can it be used on vehicle windows?
It doesn't block anything but infrared and ultraviolet.
Would you recommend low e glass for agricultural purposes in southern climate? Would enough light come into the greenhouse for photosynthesis?
From my experience, residential plants do just fine with low-e glass. I have no data regarding photosynthesis being hindered by the coating. I'd explore this further before making the investment.
@@HoustonWindowExperts thank you!
You're welcome
I'd like to see an additional demonstration of Low-E coating. Your demonstration showed a single pane of untreated glass lowered the temperature by about 100 deg (360 max to 260 max deg. You didn't show the max temp for the double and triple coated tests). So an untreated double pane would lower the temp by at least 200 deg. Did the triple coated glass have 3 panes? If not, how are 3 coats applied on a double pane window? Since the outdoor temp rarely gets above 120 deg, wouldn't a double pane window with untreated glass lower the temperature by more than enough?
Is untreated glass even an option or do installers just stock glass that's already treated?
You can have clear or treated glass for your window. The triple coats of low e are all applies together on the same surface of the glass. You can have 0, 1, 2, or 3 costs of glass regardless if it's a double or triple pane unit.
Why do you put the coating inside of outside pane of glass if it's southern climate? I was thinking it should be outside of the outside pane of glass.
We put it on surface two because that's the closest surface to the heat that's not on the outside. If you put the coating on the outside it could scratch and get damaged. It must be between the panes of glass.
@@HoustonWindowExperts okay but we want to reflect the IR of the Sun because of it's southern climate. So if the coating will be on the inside, don't we reflect the IR of our room? not the Sun's. The heat stays in the room because it reflects by the inside coating and Sun's IR still goes inside because we don't put the coating outside. Sorry I'm confused :(
I am a little confused also. I'm not sure that I understand your question. The bottom line is, they put it in one place for southern climates and in another place for Northern climates. If you're trying to keep the heat out it goes on the outside paint and Glass but it's on the inside of that pain so it does not get scratched.
have you herd of this type of low E, 10 mm Enviro-Low E
Trying to order pella 150 rom lowes, located in West Virginia.. options are low e or glazing differs. What's the difference between the 2? And which would give a more tinted look?
What is Glazing differs? I've not heard of that.
@@HoustonWindowExperts I don't know, when trying to special order them
That's the options that came up, lowE or glazing differs, tried calling pella Corp and they didn't explain it either
That's nothing I've heard of before. Can you go to a Pella store?
@@HoustonWindowExperts unfortunately in our area there's only a Lowes and about 2hrs away is a home depot, very rural area. However I've learned more from your channel than talking to specialists at either store. Thanks
Thank you for watching. All the best to you!
I am in Miami. Does LowE has any benefits if applied to 7/16 Laminated Impact Glass. There is no sacrifice glass. So today for example; the surface temperature on exterior of the glass was 117F and surface temperature on the inside glass was 113F. Is that the typical difference I should see from LowE on 7/16 Laminated glass; or it should have been much lower temperatures inside. Your reply would be appreciated.
Thank you for watching and for your question. I would have guessed a bigger differential than that. Is it possible your thermometer is looking through the inside glass?
@@HoustonWindowExperts Thank you for your response. I touched both inside and outside and it does feel the same amount of hot; almost 122F. The NFRC sticker states 7/16 Lami (3/16AN - 090 GSP - 3/16 AN). Single Glazed LowE; UF 1.04; SHGC 0.25; VT 0.30 and Air Infiltration 0.3.
That's a very Stout number!
@@manojpillai4932 There should be an etched logo in one corner of the glass. Is the logo readable from the inside or the outside of your window?
Among other information in the logo will be "SGCC xxxx" the x's will actually be a number....what is the number?
GSP is actually SGP or SG (SGP is technically obsolete but still widely used).
Do you think low E3 is sufficient for northern climate or is the price difference to upgrade to the low E3/ers worth the upgrade? Recently ordered infinity by marvin and I still have a chance to make a change. Thanks
Northern climates demand the best U-factor over SHGC. Ask for your rep to give you options for a better U-factor and then compare the pricing.
@@HoustonWindowExperts my salesman said its about $1,900 more for the ers glass upgrade but I won't save any money. His exact words were you'll save $5 over 30 years. Does that seem right to you?
Which option gives you the best U-factor? I'd say that a better U-factor might save an extra 2-3% off your utility bills compared to their standard options. The primary benefit would probably be that you'd "feel" the difference during really cold events.
@@HoustonWindowExperts do you think .27/.28 u is good for the NE?
Nice. I'd try for .25 or better if you can.
Does low-e glass have a color or tint?
It's slightly green.
Here in the Carolinas these windows are melting the siding off neighbors' houses causing thousands and thousands of dollars in damage.
Yikes! They should probably consider a 270 coating to minimize that risk.
Do you have any thoughts on KHPP Genesis windows?
I don't know anything about them. Tell me more.
@@HoustonWindowExperts I believe they are kensington windows. Pretty much has all the features most other good windows have. A reputable installer in my area recommended them for my replacement windows.
www.khpp.us/genesis/
Can custom glass makers make LowE glass?
You just have to have the right equipment to do it. If they have the equipment, yes they can.
I have a question, what is the U-Value considering a High Performance Glass? Minimum and Maximum? Thanks. Appreciated your prompt response.
Any window with a U-Factor under .30 is performing really well. As far as the maximum goes, it depends on your region; but Southern climates should be less than or equal to .60.
@@HoustonWindowExperts Thanks for your reply Brother. Appreciated.
Of course
@@HoustonWindowExperts Im sorry, but what is the unit of 30? Here in Dubai, the glass processesor, if the U value is below 2 w/m2k they consider high performance glass. I was thinking that this sounds business only. 🤔
In the US U-Factor is expressed in (Btu per hour-square feet degrees Fahrenheit) while pretty much the rest of the world uses (watts per square meter-Kelvin.) To convert you would multiply the imperial U-factor by 5.678, so a U-Factor of .30 imperial would be 1.7 metric.
Which model of amsco window is that ?
The Artisan Series.
Jeff, What are your thoughts on the after market window films (like either reflective or dark tinting)? Do you think they would damage the IGU by trapping heat in it? I am considering getting a second story bathroom window without the factory obscure glass, but then putting a window film on that would allow sight out but still provide privacy.
Most brands void your warranty if you apply film.
Referring to the end of the video, if installing window opposite way creates heat trap , what means, in low-e terminology, passive coating vs. solar coating. Is it lack of knowledge or what
The illustration I'm trying to make is that different climates require the low ecoding to be in different places. In other words, a window that's designed for the South would have to be installed backwards if I wanted it to operate properly in the North. Obviously no one would do that, it's just an example for the purposes of explaining the location of the coatings.
That means, there is no such a two main types of low-e glass (passive coating and solar coating) witch works exactly the same as your statement shows but not just by installing the same piece backwards, but two separate type of glass panels? Passive, for trap the heat and solar for stopping the heat from getting through the glass.
I may be unqualified to answer your question, perhaps because I'm not completely clear about what you're asking. With regard to low e coatings, all the information I've learned is that they are all made from Silver oxide. They can be applied in varying quantities and on different surfaces of the glass in order to achieve different outcomes. Applying low e coatings on Surface 2 helps reject heat to the outside while applying coatings on Surface 3 helps reject the heat to the inside.
If you do a Google search on the topic of low emissivity coatings, you will find a lot of technical information that may be able to better answer your questions. Thank you for watching.
How much heat energy do you loose from the sun with a Low-E Coating compared to how much heat you hold in
I'm not completely sure that I understand your question. I will try my best to answer. In a hot climate you want to reduce the amount of heat that enters into your house from the Sun. For that, we have glasses designed for southern climates. If you live in the North where you want the heat to come through the window and help warm up the house, there's a different type of glass for that.
@@HoustonWindowExperts I live in the UK and have a house with a lot of south facing windows that during the day helps warm the house my question is: how much incoming energy from the sun does the Low E coating block if any compared to plain double glazing without a coating also how much heat energy does it hold in using a Low E coated glass suitable for heating not cooling
Gotcha..
The standard low-e will block between 70-80% of the sun's heat.
Awnings : cop out or simple solution ??
Awnings are great. They would be a nice supplement for design reasons but not a replacement for low-e, in my opinion.
What about i89 coating instead of low E to keep it clear?
Dario, thanks for your comment. i89 is not a replacement for low-e coatings. It's actually applied on surface 4, which is the surface you can touch inside the home. It does help raise the U factor but is of no help to Solar Heat Gain numbers. It also tends to have a slight haze when viewed from an angle so we avoid it. We are in Houston where heat is our enemy and so we do not have any benefit to adding it in our area. Colder climates may benefit from it but it will not be significant.
Why not temp gun a double pane without low-e? Apple's to apple's.
Good idea. Too late now. They would just be for fun to do that, I already know the answer.
slim minimal window?
I do not understand your comment.
Who makes the best casement windows.? 32”W 75”H
Pella, Marvin & Windsor in my opinion
@@HoustonWindowExperts is fiber glass frames the best way to go as far as long lasting and Durability?
Yes, for sure.
@@HoustonWindowExperts is this good for a frame ? Innovative high-density fiberglass material finished to the interior with low-gloss aluminum.
Sounds interesting, what's the brand?
Hello, having a hard time finding out what the u-factor is for Anderson's low-e4 glass and Sun Smart? Any ideas? Anderson's website does not show any of this for their glass.
Also, our Home Depot here is a dealer of Anderson. What's interesting, is that their proposal was WAY less than an independent dealer. Should I be concerned?
Do you have
Since since U-factor, solar heat gain, and overall performance can vary based on the size of the window, the frame profile, the grids used, manufacturers must show the performance data I'm each individual window. Buying windows from a dealer who installs them as always going to be more expensive than buying them from a big box store. Check out the video I made call why are windows so expensive. That will explain it.
Just had a salesman here with his sample and the window was so coated it looked like a sunglasses lens. No thanks.
That's a sign of cheap glass in most cases.
So, would the folks that live in the "northern climate zone" would not want the Low E at all since they would take all the warmth from the sun they could get? However, Florida would be just the opposite.
Low-e also helps keep heat inside the home when positioned on surface number 3.
@@HoustonWindowExperts Thank you!!!!! Now, does argon really work or should I say help?
It adds about an extra 5% benefit. It's worth the small cost to have it there.
@@HoustonWindowExperts Ok, thank you. I love your knowledge!!!!!!!!
I wanted to see 94-95 soishhh... Temperature..
I'm not sure I understand.
I got salesmen telling me that my windows have to be coated or tinted because of Federal law ????
Code does require minimum energy efficiency levels now. They vary by state. Visit EnergyStar.gov for details.
Low E is such a pain in the ass to clean with water fed pole systems.
I'm not sure exactly what you're talking about. The loic coating is on the inside of the glass between the panes. Can you please elaborate?
Single layer of glass vs double layer glass sealed and filled probably with argon and coated... What a poor demonstration. Why not use double layer glass sealed and filled with argon non coated vs same but coated , that would be a better demonstration.
I appreciate your comments. the reason we show a single pane versus double pane sealed with argon is because in a typical homeowner situation they are converting from single pane to double pane. Comparing double pane with no low-e to double pane with low-e would not be a likely scenario that people are interested in comparing.