How to Design and Install a Good HVAC System for the South
HTML-код
- Опубликовано: 26 июл 2018
- How to get to an excellent heating and cooling system in your new house in the hot and humid south!
In this episode, Kristof Irwin P.E of positiveenergy.pro Ted Cushman - Senior Editor at www.jlconline.com/ and Matt Risinger have a real world discussion during the "Hot Humid Climate Conference" week about the details of designing an awesome HVAC system. Air Conditioning is NOT Air "Cooling"
Subscribe to JLC - www.jlconline.com/subscribe/d...
Ted's JLC Article - www.jlconline.com/how-to/hvac...
The Building Science Podcast - itunes.apple.com/us/podcast/t...
Instagram:
Matt Risinger - / risingerbuild
Positive Energy - / bldgscienceatx
JLC Online - / jlconline
Huge thanks to our Show sponsors USG/Tremco, Polywall, Huber, Dorken Delta, Prosoco, Rockwool & Endura for helping to make these videos possible! These are all trusted companies that Matt has worked with for years and trusts their products in the homes he builds.
www.Securockexoair.com/en.html
www.Dorken.com
www.Poly-Wall.com
www.Huberwood.com
www.Prosoco.com
www.Rockwool.com
www.EnduraProducts.com
I have a compliment for this channel. Sadly this comment isn't related to this video. But I have had many customers come into my lumber yard telling me about your channel. It is insane when I recommend the customers to your channel, and they reply with "Those videos are the reason I'm here!" You make my job easier Matt S.(plus the team), Thank you for providing this information to the home owner. Again, keep the quality posts coming. Much appreciated.
I'm beginning to think we all start with Matt's videos and then go deep into the rabbit hole. But good info to apply. Love it.
I'm a Wacoan who for years has chafed feeling like my modern HVAC serves me most days little better than my grandparents' swampcooler. My hubs said a dehumidifier was overkill. I'm vindicated hearing that the integrated dehumidifier is part of what our modern systems need!!! Love this
"You don't eat the recipie." So much can be drawn from that one statement. All the design, engineering, etc means nothing if it can't be installed, and maintained properly. Being in the retrofit market for both building envelope and duct sealing, I see houses every day where the HVAC was never designed, and was poorly installed, and never maintained properly. It is so difficult and costly to fix these issues after they are found. Thank you guys for doing it right! Hope that some folks will learn from this.
William Dafoe + Matt Damon = HVAC guy.
Yeah. Close.
Bahahaha
Matt Damon + Mark Whalburg...
but the muppet version... :-D. He's a smart guy though. Second video I've watched with him.
Ahahahahahaha
if you're going to do the "round table" thing, think about 2-3 static cameras and editing the video using the most appropriate angle for the speaker
I’d say this is a fresher take than that
this guy is genius his idea should be in every single house. love this video
This was amazing! Thank you very much for providing the opportunity to listen and to watch this fantastic discussion! Thank you, Matt, Chris and Ted.
Many thanks for these great videos... I’ll be building a new house at the start of next year in SW Florida and I’ve learned a *_ton_* from your channel so again, thanks !!
I hope I have the money in the future to hire these guys. Test a system BEFORE it's finished! Holy cow! Who'da thunk?! Wish more builders did this. My master bedroom cooks because of bad design.
Yeah, I appreciate trying something new but def. getting dizzy.
Thank God for true professionals. Thank you. Keep it up!
Thanks for doing this talk! It's nice to hear quality HVAC information.
Ted Cushman is a prolific writer that I've been enjoying for years. JLC (Journal of Light Construction) always has something interesting. Thanks for a great video Matt.
You have created a monster in Houston. Currently replacing my plenum and taking out all flex ducting in favor of ridged. Hoping for pleasant outcomes this summer.
Cheers, Matt.
As a young architect, this video (and your others) are invaluable. Very hard to find info as concise as this. Thank you! and the camera work was great, ignore all these curmudgeons saying otherwise
Excellent video and definitely going to be using this info for my new build in central Florida!
Great video! I understand the round table aspect and the camera movement. You never know if you don’t try. Don’t let the peanut gallery hate too hard on something they probably couldn’t do and don’t under stand all the behind the scene work that goes into a video like this. Multiple [still] camera angles are complicated and pricey. Moving the camera was a decent way to show the round table aspect with just a single camera and videographer onsite.
Great job Matt. I’m getting ready to build a home in south Alabama and this is very relevant information. Thanks for providing it. RUclips commenters have been especially critical lately. Guys, ease up.
Fantastic explanation of something that has been such an after- thought in the construction industry forever.
Great video content! I love to see the super geeky information as it takes us to another level of understanding, makes us better builders, and makes us demand better quality as a consumer. Please do a super geek series weekly/monthly as part of your content!
Loved the conversation.
Its so nice to see planning and engineering go into a house. I work as an electrician in rural east texas, and i never see that kind of planning. Ive lost count of the houses ive wired where i barely had a cabinet layout for the kitchen. And then come back for the trim and the layout has been changed and noone botheres to tell me
Great info. Thanks for the video.
Amazing video guys. Thanks for enlightening the audience with the importance of HVAC design. Looking forward to collaborating with your team.
Great Video- this is almost a public service for home buyers. Camera work made it feel like a short film about a day in the life of a mosquito. Love your channel, and really appreciate all your information.
This style of filming has been used by some of the best directors in Hollywood.
@@charlesarmstrong3536 It can work really well, but if the camera movement isn't smooth and almost predictable by the viewer, it can rapidly go from "pulling the viewer inot the scene" to "making the viewer nauseated". Like how its a lot easier to get carsick as a passenger than a driver.
Love the longer episodes
Great video! I liked the style. Good information.
One of your best ever Matt. Awesome.
Great discussion and great content for anyone who cares about air conditioning. I appreciate this video.
As one who works, inspects and travels through the spaces hvac systems are run... I feel the need to point out a huge oversight in most hvac installations. We must keep future maintainability (of all sorts) in mind while installing hvac systems. If access to attics, crawlspaces or wall voids are blocked by duct, drains, vents or wiring, your average worker will damage the obstacles to access his work space to get his job done. I see it everyday. Plan for safe, stable and sturdy movement of techs and equipment over under and around your system in the years to come.
informative video thanks
guys this was great like to see more like this
A minute and a half from the end he made a TRUE statement. You can live with and be comfortable with a higher temperature if the humidity is right, (read low) Years ago when I was doing a lot of industrial HVAC we used a humidistat to override the thermostat and run the A/C till the humidity level was where it needed to be for electronic equipment. That then made the conditioned area too cold so we'd use reheat to temper the air. The thing is people like this are working everyday to improve the results we get from not only the HVAC system, but plumbing, electric usage, life span of our homes and comfort levels. More expensive? Yeah. But like everything else as new technologies are developed and eventually made standard the price comes down. People need to get used to the idea that conditioned air isn't JUST about temperature. It's also about cleaning the air, making the humidity acceptable for the materials used in building the space, doing away with mold and mildew. Ideally one doesn't want to FEEL air movement. It's getting more complicated, but the results are well worth the efforts.
Matt thanks for video! i am in process of building in and near memphis tn. would you recommend dehumidifier for our climate as well and is this a whole house dehumidifier? What would be an average cost? thanks i really enjoy videos you make
I want to see a commercial chiller setup for cooling while heating storage tanks of water for domestic hot water in one of your projects. Great content as always.
What a great, informative video.
Enjoyed the video, but have a question. Once you complete the home project do you bring an HVAC balancer in to make final system adjustments, or is that strictly done in the commercial domain?
Excellent video Gentleman.
Good info where do u put a a dehumidifier?
I loved the camera work. Great job guys. How do you get dizzy watching a screen?
Aaron Brandon I know, right? Everyone’s a f’n critic - what’s with all the whiney baby’s griping about their bellyaches or nausea? Get a life guys. If your constitution is really THAT weak, you might ought to see a GI doc.
Putting oneself out there like Matt is doing with his team each week takes a helluva lotta work, constructive criticism is one thing, but jeezus. Grow a pair..
Great content. Like others the camera moving was a little fast. It actually would work I think but more thought into speed and ability to focus on the speaker is needed. Appreciate the attempts at new video styles. As always the content wins regardless of camera techniques. Thank you, thank you, thank you.
Brilliant!
Great info
Positive Energy is tough to work with... Everything I read and saw had me wanting to use them. Miguel the Business Manager scheduled 2 calls with us and no showed on both of them. When I contacted him afterwards (they won't give out their phone number) he complained that I wasn't understanding enough that he was busy (he picked the call times -- not me) and refused to talk to us!
No idea what he is like if you actually talk to him, but if he doesn't like you you might be treated poorly (like us).
Matt Risinger
Do you have some information on how to find a local company? Also, would something like the design shown be applicable to a retrofit?
For example, my home has duct work in the basement and the attic so it’s all accessible. Thanks!
Generic question. Would the material of a duct be better if it was made out of a conductor or an insulator? I know you'd still insulate the outside of it, or keep the bulk of it within the building envelope, but does the end result benefit more from the duct itself heating/cooling?
Christoph showed his engineering plan for the air conditioning which is the reference document for system testing and City Code certification. Having a plan is required for remodels and air conditioning system replacements but, here in San Antonio, it's not required for new construction. Therefore, the air conditioning systems for new construction in San Antonio isn't tested or certified to code. In San Antonio, the only time that new construction will have an air conditioning engineering plan, testing and certification is unless the owner/buyer takes the initiative and pays for it. Thanks for the video!
Matt, we have a encapsulated crawlspace, would you agree with our HVAC tech that wants to condition that space by installing a vent in the supply line in the crawlspace. We have a dehumidifier in the crawlspace, but are not currently putting conditioned air (from the HVAC system) into that space. Do you agree with him?
Ty
would you do a segment on roof penetrations and plumbing ventilation?
@Matt - your channel thoroughly covers dehumidifying, but would you please address re-humidifying? Also in Texas, keeping our air humidified can be a real struggle and challenge especially in the heat of summer and cold of winter when HVAC is running much more. Thanks!
how about a layout an the why an where to put the ductwork in a new construction along with the components
Do you not do a blower door test to see how tight the house is before designing a hvac system also is all the ductwork taped an insulated
The Fungus among us likes a little water and a little wood. Keep your wood dry! Also good idea to keep the wood in a house dry.
Does the dehumidifier also act as the ERV or do you need a dedicated ERV?
What's your opinion on high velocity mini duct systems?
I think your camera man is actually doing a hell of a job! Pay him extra!
ladies and gentlemen, we found the camera man...now go grab the nailgun.
Good stuff.
what about the heating side? is it just flipped in reverse or are their other factors? I realize it's TX but I'm sure you have at least a week or two of winter. Love the show!
Question? We upgraded our A/C to a larger unit and now it seams that the air ducts are to small. Live in Jacksonville Florida.
Easy to do in the Luxury home market of ATX. I can't believe there would be other contractors out there that actually don't do this with multi-million dollar homes.
How about sealing all of the duct work with closed cell foam? 100% sealed, 100% delivery of conditioned air, and all duct work noise eliminated (flexing of the metal duct work when the HVAC unit pressurizes and depressurizes), and increasing its strength?
Are there separate ducts for humidity and temperature control?
A dehumidifier is different from an air conditioner in that it HEATS the air after it cools it to condense out moisture. If you're going to heat the air, your central heating unit is likely more efficient at the job from a standpoint of energy use. Another possibility is to have registers that divert that cooled air (when you'd like it a little warmer) UP rather than down. And an intelligent system would know what time it is, and what interior surfaces are likely warmer due to sunlight through windows. Then you don't waste more energy heating the air you just paid to cool (and dry out).
Kristof should have his own show.
Excellent info guys.
Now, please recommend someone to me in central Alabama. Lol
Alan R Atlanta? Please...
Where would I find information for split system for a small home? 30x 28, 2 bdrm.
what happens when we let the dry air come in, without dehumidifying the existing air. how would it affect the air conditioning Matt?
Looking to build a unvented conditioned attic for a new 1900 sq. foot ranch home build in the south. At a minimum when doing this would the addition of the recommended insulation in the roof with no attic going out the roof vents, add a fresh air damper with wireless remote control such as a FAS 6 model, run the ducts low in the attic, use a horizontal air handler, seal the ducts well, insulate the the ducts well and air handler, keep your attic cooler with a reflective roof or radiant barrier, and providing a good air and vapor barrier? Would this setup provide a substantial energy cost savings for running the HVAC over the old vented attic with the HVAC running in a unconditioned environment setup?
Is that Matt Damon talking about air conditioning quality?
Matt Damon's older brother. ;)
Right?! I thought I was the only person that noticed 🙊🙈🙉
What can be used instead of a duct board plenum?
How are they going to bend the drywall into that arch in the background?
I'm a hvac contractor. Ductwork is the #1 problem I see.
dpeagles can something else be used besides a duct board plenum?
I prefer round metal duct with insulation on the outside of the duct.
@@dpeagles We use 30 gage round galv duct for the majority of the system here in Maine, and insulated flex from the unit to the outside runs, which we keep as short as possible.
@@technorex344 Same here
Great role play . Much of this is not new, unfortunately there's a huge difference between custom and production homes. These options "upgrades" above minimum requirements are generally priced out of reach and most of the time the homeowner is not aware they had any of these options because they had to many paint swabs and fixtures to choose. I think they're convinced it's "just heat and AC" because I've heard time and time again "I wish I knew about this when I built it?" If our customers don't know about it how can they assess any value to it.....Enjoy your show
Excellent content as usual Matt...I was not at all affected by the camera work...Did not even notice it...Seems like the snowflakes always like to complain...Keep up the great work! May the Good Lord continue to bless you and your work.
I have a lot in el paso that needs building and not sure who to get that would know where to hire from can you help it be great if you could put it on youtube from start to finish with recommended products, and yes i am on a budget
I am out only got to 11 mins.
very good subject.
but the camera work is sickening
I wouldn't say sickening, but focusing on people when the topic is construction details left just a small void. The tough thing about a video is you really need to develop a script first, then plan the video sequence in support of that. If everything goes right during construction, a drawing or two is sometimes a good thing to visualize a 'what if' problem to highlight why what is being done is correct. Overall it's a good review of space conditioning, and time well spent. I do love the attention spent up front: integrating framing and mechanicals [not letting a subcontractor invent it on the fly] at the same time is worth a little extra cost in the planning stage.
This is a case of a videographer desperately showcasing their perceived acumen for cinematography. We don't need bokeh and mindless circling to emphasize the unrealized drama of HVAC design,. I wanted to learn rather than be dazzled by someone's desire to upstage the subject and subject matter. Keep it simple. I respect Matt for his knowledge, not for your camera skills. At the end of the day, that is what monetizes this effort.
Came across this video. I’m a returning Mechanical Engineer in the workforce..and would like info on steps to get into the HVAC Engineer field. Mentorship, entry level, etc.
Thanks.
What is your opinion on using misters on outside central ac unit?
When using misters on the outside heat exchanger, you are just effectively increasing the size of the heat exchanger. If the system was properly sized and designed from the start, there is no need for that. Just keep the unit and coil clean. That’s besides the downsides of constantly wetting that coil and compressor and cabinet that was not designed for being constantly wet. You will wind up with mineral deposits from the evaporating water, and corrosion on parts.
In most of the homes I have lived in, the room HVAC vents are most often installed in the ceiling nearest to the HVAC unit. In addition, most rooms do not have a return air vent. So, to my way of thinking, the forced air does not really service the entire room, particularly if the vent is near a doorway. It also seems that the windows are often far from the vent. Is this by design or is this a "shortcut" by installers.
Shortcut. Vents should be on outside walls.
Just curious. You speak of flexible duct work as being part of the structure. So why do I see a vertical flexible duct right where you are having your discussion?
Robert Hoy great question. We use small runs of flex duct at the terminations of a runout help keep sound dampening in mind for especially sensitive clienta. It’s pulled tight and you can reach in and clean the entirety of the flex portion. When the whole distribution system is flex, that’s where the problems begin to multiply.
Positive Energy - Integrated Mechanical Design thanks. Now it makes sense to me.
Poorly installed flex is the problem. I usually use flex from the plunum to the register for sound attenuation. I just ensure the plunum is within 15-20 feet of the register. I once had a customer with a cold room of her house. We ripped out a 50 foot long 6" flex duct from that room. 50 feet! We then brought the round plenum around the house to within 10 feet of that room. She said " That's the first time I have felt air blow out that duct.". Keep in mind we changed no equipment. Just ducts.
I'd like to hear more about high velocity ducting and the trade offs Vs standard flex or metal ducting.
Greg Breland you could write a text book about the nuances of static pressure in each system configuration you’ve mentioned.
I was under the impression that VRF systems did not need ductwork. VRF systems usually use a 3 pipe system. Typically 1” pipes. What are the metal ducts in the video for? Can you use the metal ducts in a VRF system? How does that work?
SO I guess to build a cooling system I need load calcs and some blower door tests?
thanks for the tips lol.
Ill give you a tip....big duct work and low return pressure, Because once you put that new fancy unit in that x13 blower motor is going to fail every few years unless its flowing freely.
Matt, How do I find the Kristof in my area? What questions do I ask? I have existing home that the duct work was NOT built right and now I need to somehow correct it. Any help is greatly appreciated
Brian Corbett we’re not sure if there are many companies like ours. Residential focused building science oriented engineering firms are rare. But you can get in touch with us on our website for projects. We can design for projects anywhere in the world!
Really love the idea of having an in-line dehumidifier, but boy, I imagine between the design, the equipment and the labor, this must be pricey!
Besides, for a hone of that size, I imagine they are probably installing some sort of zoning system as well, and those don’t come cheap.
David Cerino 5:00 and 5:40 10%-15% more
Had to just listen to audio. You have a good style already no need to get all crazy.
Hmm checked out positive energy and there is no contact numbers available, only E-mail. that's not a positive sign.
The HVAC system manages the relationship between the homeowners and the environment to suit their temperature preference for comfort. If all a homeowner did was buy a house and leave out the HVAC system, then they would still be at the mercy of nature since it would affect the temperature inside the home, which impacts their comfort level and happiness inside of the home.
I have had two houses built in the 60's. One had metal ducts in the basement and no problems. The other had flex ducts in the crawl space and the HVAC was broken. All the floor joists, subfloor and everything were replaced/sistered because they we rotted. Today I cannot find anyone who will redo the AC without flex duct So I'm using window units until I can find a contractor who will put metal or other hard ducts in the attic with a common returns from each room to the attic space.
Are there any high efficiency dehumidifiers on the market? unlike A/C units, that have plenty of competition and demand for better and more efficient technology. there are not too many whole home system dehumidifier companies/products that I know of on the market, so I could imagine these systems potentially being very inefficient.
I need someone who produces the same content but in the Northeast, anyone find something like this? Love the channel, Matt.
and yes, all i did was listen to this video because I was dizzy in 2 minutes.
Brian Johnston check out Natethehousewhisperer.com if you’re in the Ohio region
This was one of your best videos to date but I agree with others, ditch the circling camera affect. I like these casual camera discussions, your mechanical engineer has a good personality and explained things well. My take-away, from someone who does design engineering for a living is a solid plan isn't full proof but goes a long way for well built construction. (as long as builders follow the drawings, and communicate for revisions when things don't go as planned)
Don't crush a duck! Love you show
Live in south Texas, Had a high tech dehumidifier added to my system. Worked good, too good. Shrunk and cracked all my mounding and trim. Who knows what other damage or warping caused behind walls.
You can't run a dehumidifier all the time. There should be a desired set point for humidity in a house. 40% is pretty optimal.
A dehumidifier should be connected to a humidistat that shuts if off once humidity is reduced to the set point.
I have heard of other people doing this. It pulls all the natural moisture out of the lumber and shrinks the framing. In one case, I heard of a house where the ground floor was about to move into the basement due to this.
I keep seeing you talk about keeping the humidity down in your systems but what about the winter when the humidity in the home gets below 15% ? Isn’t that bad , especially with real wood floors ?
hkgonra never happens in central TX
thedge7 it does if you heat with wood.
@@hkgonra
A humidifier can be added to your system and is a good idea if you have to put up with ultra low humidity.
I live in Austin, Texas and in my experience living in houses built in the 30s and 40s humidity can drop to an uncomfortable level in the winter time in houses that aren't sealed as well as modern ones.
I’m having a hard time finding someone for this type of design work in Central Florida. Any ideas? Seems the local companies are stuck in their old ways.
@Kyle Norris My name is Ryan Anderson, I own a company called Native Air Conditioning, LLC. We would be more than happy to talk to you about your project. We are out of West Palm Beach, Florida - But are a state licensed company that travels throughout Florida. More importantly, we have the experience and ability with VRF/VRV, it is one of the things we specialize in. Please reach out directly if you'd like at (561) 766-3000. Email Ryan@nativeairconditioning.com
We can also be found on Facebook, Google, etc. Thanks!
long episode? make sure you keep the information long and rite and keep it coming. ill watch an hour video. .you inform. not mis inform. keel the videos coming
I wish I lived in a place where there were people like this that you could hire to design and build. Around here it's get it up cheap and fast.
These guys are not cheap and you can sometimes pay for fast(er). They do not build tract homes. This kind of information is good even if your budget doesn't fit acquiring their expertise. They offer it freely and you can take this knowledge to your builder and ask for these techniques. If your builder can't perform you have to reach out to find the expertise. All these things cost money. If you can afford these techniques great but if not you have to be wise enough to figure out how to save money and get a close approximation to the benefits these techniques provide. All in all building science can be used at any budget to get a better home but a lower budget will require trade offs.
Agree with Haychee. Camera-work is super distracting and made stop watching this.