How to Install a Tankless Water Heater | Ask This Old House
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- Опубликовано: 20 янв 2018
- Ask This Old House plumbing and heating expert Richard Trethewey heads to Milwaukee to install an instantaneous water heater.
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Richard installed an RUR Super High Efficiency Plus instantaneous hot water heater [amzn.to/2JxgPk3], manufactured by Rinnai [www.rinnai.us/].
Cost: $2000
Skill Level: Expert
Tools List for Installing a Tankless Water Heater:
Pipe wrench [amzn.to/30C1bcN]
Drill [amzn.to/2xMFxWQ]
Hole saw [amzn.to/2JuwyjA]
Shopping List:
1” gas line and fittings [amzn.to/2XN1e3E]
4” PVC pipe and fittings [amzn.to/2XO6Pa1]
PVC glue [amzn.to/2Jy9wsd]
Teflon tape [amzn.to/2xQB45f]
copper pipe and fittings [amzn.to/2JxhRwo]
Pipe cutter [amzn.to/30vgHa5]
Steps:
1. An installation like this that involves gas piping is best left to a licensed, professional plumber.
2. Shut off the water and the gas to the hot water tank. Drain the water out of the tank and remove the old tank.
3. The new water heater may require a larger gas line, which will need to be run from the gas meter to the water heater.
4. Using the hole saw, drill a hole on the outside of the house near the location of the water heater. Run PVC pipes for the fresh air intake and vent through that hole.
5. Connect the cold water supply line to the water heater and the hot lines out of the heater using the _” copper pipe.
6. An on-demand water heater requires an electrical outlet. An electrician may need to assist in adding one near the installation location.
7. A cross-over valve can be installed at the furthest plumbing fixture to allow the built-in recirculation pump to keep hot water at the ready.
8. Turn on the cold water supply, gas supply, and power to the water heater and test.
Resources:
Expert assistance for this project was provided by Budiac Plumbing & Heating, Inc of Milwaukee, WIsconsin.
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How to Install a Tankless Water Heater | Ask This Old House
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I was on a housecall last month and witnessed a HotPoint water heater from 1948 still up n running fine!
How the hell?
@@Joshuam808. Yeah bro the manual was still sitting on top of it haha
My favorite part was them looking each other in the eye while asking if it feels good fondling the water
LOL
I eat eggs
It’s a tankless job but someone’s got to do it 🤠
I love the nice music while they work. When I do things, there is swearing, smashed thumbs, gouged hands !!!!
😂 you sound like me.
If you do something right, people won't know you've done anything at all. I finally realized that Richard is an excellent host, and this was a good example of that.
As a master plumber in Texas i love how they installed the service valves
I'm in Texas and need a master plumber! Wish TX wasn't so big or that there was a way to reach folks on here!
I'm really glad he took the time to explain all the issues with these type of units and the solutions for the issues. Very nice video.
8:44 This man's sense of humor is always great
I love it when Richard puts on his glasses
I put one in and I love it. A friend put one in with a circulating pump and he said the problem is instead of waiting for hot water, he often times will turn on the cold, and it's hot and he has to wait for cold. He decided to just turn the pump off.
There must be a problem with the bridge valve.
Very clean good looking install on that tankless water heater. I also like the zip ties under the sink to hold everything neatly together.
Thanks Rich! Your a true professional! I'm going to upgrade when the time comes!
I installed a Takagi unit 21 years ago and it it still works great. As for maintenance I only ran a cleaning solution thru it about 5 years ago. I would recommend tankless all day long! As to why I did it, I had converted my double to a single and got rid of two hot water tanks.
Thank you so much - that's exactly what I was wondering - how to maintain it!
Richard Trethewey is pro. I always walk away with some excellent life learning info, about plumbing that is valuable for homeowner.
that recirculation explanation at the end blew my mind!
He does a great job explaining. I finally understand it without being a plumber.
Thanks! This really helped me in my decision to go tankless.
I lived in an apartment in Korea. The tankless water heater was part of the radiant heating system, too. It's the thermal mass approach to heating, so that could add more benefit. I always had hot water very quickly.
👍
I saw that on a build of a cabin. Great idea!
I have an old school gas water-heater.
I lost power for 3 days, because a neighbors tree fell on my house and truck, and tore the electrical straight from the meter socket.
Even though it was winter, and the house got down to 52 at night, hot water still worked and was welcome.
I don't think I will ever go with a tankless, or power-vent type water heater.
(Until the government forces us, of course.)
I should add, that all water faucets are at the opposite side of the house from the water heater.
If I had to go tankless, I would want the tankless heater to be installed right in that area, which means running a gas line.
In a really bad situation the water in a water heater can be used as a water source.
True! Most people install a battery backup so their tankless heater can operate a few days without power. (Some people install a small storage tank along with the tankless heater. ) Tankless and storage tank can each have their uses depending on your situation.
I wanna work for you boddy. Plumbing is a fun job. You did it clean and logic. Congrats!!
I've always had a big tank water heater, and I always have to wait for hot water. In Japan, I had one of these things and the hot water came on really quickly!
I like how they touched hands at the end.
Beautiful install. Love the strut brackets. Professional plumbing right there. You can tell Richard didn’t do the work on this one. M12 tubing cutter is a game changer along with the M18 pro press. M18 hole hog is awesome. Love all the beautiful Milwaukee tools. Rinnai’s are the best!
This unit had a copper heat exchanger though. Very susceptible to bad water issues. Stainless is better.
That was a Rennai? Been looking at them for 10 years as the quality seems pretty good. I still have not installed one yet because plumbing up here in Boston is so expensive... I just saw the control panel with the name...:)
Same here in NY smh plumbers are asking for
$4000 up to $7000 for an install on a tankless
It’s ridiculous because I already have a tankless I need a replacement and they’re charging as if I’m putting one in for the first time it’s crazy what they’re asking to put one in
That's pretty cheap considering you guys live in a high cost area here in idaho. It costs $10,000, not even done by licensed plumbers 😢😢😢
@@cappz477 It's going to cost me less than $1000 for the install and the heater/fuses/tubing/6AWG. Lucky enough to know how to do it. Just as you watched this video, you can watch in-depth videos on how to do the installs for Gas/Electric Tankless units. You might be able to install it yourself if you contact your city and ask about Home Owner Permits for self renovations. It really isn't that difficult to do if you are a capable person.
If you have trouble doing even basic repairs on things around the home though, you'd be better off paying more for someone qualified to do it.
Awesome,.. I just watched this same program yesterday, on PBS👍
Immaculate clean work
Richard is obviously a big fan of the tankless which no doubt has its benefits but no mention of the upfront high costs and annual service needed on the unit.
The need for annual flushing is the result of hard water; minerals in the water build up in the heating pipes. Use of a water softener practically eliminates the annual service.
Fair. Poor people are not the people whose houses are getting worked on on TOH, that's for sure :D
This was fascinating. I have a tankless water heater, but I don't have one of those bronze valves you showed under the sink that circulates the water into the cold line. I need to look into that, because in our kitchen, it does take quite a while to get the hot water over to it, since it is on the opposite side of the house as the tankless water heater.
Bruce A. Ulrich that tankless has a built in pump as well
My master bath is the farthest away from my tank hot water heater. It takes a couple of minutes to get hot water to it. Maybe three.
The house came with a recirculation pump. I hate the thing and simply unplugged it. Nobody takes showers at hard-defined times - good luck with narrowing that down to even an 8 hour window. So the pump would need to run all the time, driving the gas bill into the stratosphere (even in July) and it would make the tank heater work extra hard - all for the benefit of making the water less cold.
You see here's the deal with the recirculation pump: All it did was make the water less cold. In no way would anyone still want to get into the shower with the less-cold water coming out of the shower head. So every bit as much water would be wasted to get the appropriately hot water to the shower - all for the benefit of a sky high gas bill and a harder working tank heater.
Even if robots lived here and they took showers only at predefined times, the net result would be every bit as much water wasted, *much* more gas would be used, and the hot water heater would have to work *much* harder.
Total, epic, fail.
@@gskibum I'm kind of glad you mentioned this because I am curious myself as to how to tackle that. My plumber is coming to install one but today... I'm sure you know gas is not as cheap as it was when this video was made. So I am nervous about switching from the electric hot water heater I currently have to a tankless gas water heater right now. I have well water so I'm not terribly worried about wasting 1-2 minutes to heat up my showers. I am terribly worried about wasting gas, especially in the warmer months when I normally don't have to right now. Kind of in the fence here about even switching to a gas instant hot water heater.
@@Little_Bitz Hi LilBits. I may have caused some confusion. I was talking about those recirculation pumps that are supposed to remedy the problem of wasting water because the water coming from a hot water faucet is very cold for the first spell.
A real good friend of mine is an HVAC guy I trust a whole lot. He's moved on from residential work to large enterprise installs. He swears by tankless, although I suppose the choice between gas or electric comes down to the cost of electricity in your area, and how much it may increase.
Where I live, gas is still the way to go.
He did the great job for install the new water heater.
My water heater was made in 4/77 A Jackson heater and still works great
One advantage to the good ole tank style water heater is the simple fact that it contains 40-50 gallons of water. About 20 years ago I lived in an area that had a forest fire. My house was nowhere near the fire but the cities main water dept building was consumed by the fire. The supply of water to homes stopped because of it. Luckily my water heater had a special valve to prevent water from going backwards in the supply side pipe. I attached a hose to the drain valve and filled 5 gal containers. We had more than enough water to get us through until the water dept cam back online.
Dude, it's a tankless job but somebody's gotta do it.
ericlogos I see this exact comment on just about every tankless water heater video lol. By the way you’re welcome lol
Don't get me started!!!
Prepperjon hahahahaha
Ha! Get it?
Lol 🤣🤣🤣
You are the master my friend!!👍👍👍 very good job
I live in Italy and this is the main system that we adopt for hot water.
I love our tankless. In our 6 bed, 4 bath house with dish washer and laundry we never run out of hot water. For our Airbnb that's pretty important. We have a mid-efficiency Rheem that uses about 10 - 14 therms of natural gas a month. At 40.9 cents a therm that's about $4.90 - $5.73, or $58.80 - $68.71 a year in operating costs. I shopped the net and found a new RTG-95DVLN-1 for $799.00 (shipping included and no sales tax) and installed it myself using CPVC pipe and Sharkbites to tie into the existing copper. Piece of cake. The only real challenge has been venting through the wall of the basement to the outside. The stainless steel concentric vent pipe has cost about $375.00. When the time comes to descale I've seen on RUclips the heaters can be descaled with clear vinegar. My plumber wanted $300+ to do it. I'm of the opinion most plumbers don't understand tankless heaters and are scared of them, which would explain why they trash talk them. After 10+ years we are on our second tankless ...
I'm a plumber and that's a very biased untrue opinion. Also how do you know how much gas your unit uses each month unless that's the only thing running off of gas?
@@pauljohnson8154 how much does it cost to install this unit if you have all utilities like water and gas near it all you need to do is connect everything together..
@@bajarizo7255 it varies a lot, many times if you are replacing a gas tank type water heater your gas line is undersized for a tankless, regionally what plumbers charge changes quite a bit
No aspersion on plumbers generally, but I agree some do not want to install a tankless when the storage tank is familiar to install. I wouldn’t say they don’t understand them but several advised against one but would only say they’re “more maintenance.” Which can be true but some new ones have scale prevention.
The one thing people are forgetting here is the endless hot water supply these unit provide. My Rinnai tankless unit provides endless hot water, so the days of cold showers are a thing of the past. No regular water heater can do that , excluding a boiler. And yes I have seen a big difference in the amount of money I am saving on heating water. Btw I leave in northern US.
I mean it costs few hundred bucks to heat an avg water heater yearly. Your paying how much to install this and get rid of the old unit? Around double the cost of a standard tank unit. All that for 30% cost savings on the high end? So around 100-200 bucks a year in savings? But tankless supposedly last 5 to 10 years longer then a tank unit. So you will see a return after 4-5 years. This is all of course if the tankless last longer, is 30% more efficient, all the extra connections dont need repairs and if the costs are only x2 the cost of standard. When i did some bids on my house the cost for tankless was x3 times more. In any case you should see a return after at least 6-10 years...give or take. Worth it? Idk
@@BobBob-we3wr bob we use this for decades in the netherlands and i must say the one they using is outdated the world leading brand is intergas try to get that brand.
And also here the instal and machine comined is around 1300 dollars so those 4/5k prices in the states ar a rwal rip off.
Ofc all house alrdy have a pipe system here in the netherlands so its only connect and tune and its done.
@@BobBob-we3wr In my view the biggest advantages to tankless are 1) unlimited shower/bath lengths and 2) direct vent. The cheap tank models use room air for combustion and have a gap between the exhaust and the chimney connect, which is a dumb way to do things--what if your bath or kitchen is just a bit too strong, or the wind is blowing the wrong way? Of course, standard efficient direct vent models do exist, but then the cost difference is almost nil.
We love Richard. Always.
If only we had these guys down in Florida. Such bad work in Florida. Great info on the recirculating versions like the Rinnia RUR98iN (Natural Gas... P is Propane). Spoke with Rinnia today and these guys explained it better.
I have a Japanese made Rinnai hot water heater. I've been quite impressed with it's performance. I don't have the recirc feature, so you do have to wait a little for the water to get hot. It's not too bad since most of my water appliances are fairly close to the heater. It's really nice not having to pay to heat water up all the time when you aren't home or not needing hot water.
an not paying the gas company it keep the hot water on
I have to wait for hot water to get from my tank to my tap anyway, so what's the difference in that?
But most homeowners will have to pay for installation of larger diameter gas supply lines or higher capacity electric supply, new wiring (with surge suppressor), perhaps additional vent piping unless they live in the south and want an exterior installation, regular professional descaling, etc. And, if your area is prone to power failures, there's no power for the gas igniter, so, no hot water. Many will never recoup the added expenses and would be better off just adding an insulating tank cover, if their units aren't well-insulated.
wholeNwon I believe there is a pilot flame in some of them same as a tank style water heater
I'm not aware of any. Maybe you can provide an example. The nature of a tankless design might make it impractical.
I wish this was live on Facebook so I could have told the guy to move over 2 feet to his left so he could stand straight up. I’m 6’5” I know the struggles
As a plumber, I have found installing these units to be a tankless job.
Love the ProPress by Viega!!!
I don't understand the complaint about waiting for hot water. I have a water tank now and I have to wait for hot water when I turn the faucet on.
@@fixedguitar47 These are problems everywhere America may be developed well through the hard work people put in but these are still inconveniences that exist everywhere.
5 gallons for me at shower. I do not shower with cold water... so i save it to flush... 5 gallons adds up... wife showers separately so 10 gallons down drain daily,then the sink kitchen..
Those are awesome if someone know how to size it up properly and its water on demand not that ur faucet gets its like NOW for that u need a hot water recirculation system
@@fixedguitar47 i know im a plumber but alot of plumbers dont know how to size it up properly thats why ppl complain
I don't think it's meant to be a complaint as much as I think people believe tankless means instant. I think they could say it better though.
You have to wait for hot water on either Tankless or Standard water heater some people just like to fuss.
No. The problem comes when multiple people need to take hot showers at once. Often one tank of hot water simply isn't enough. That's why it's important to have tank-less because it has unlimited hot water.
With tankless heaters, one faucet at a time gets water, others will get some and if someone else turns on a faucet, hello cold shower. For 35 bucks a year in extra energy used, ( you will spend more than that on worse things) I have a tankless heater feeding my water heater so there's. Always 30 gallons of hot water available for use. Never run out of hot water even if every faucet is on at the same time
@@billgrant2116 was that complicated to combine
?
@@billgrant2116 Not true at all, do your research. Tankless water-heaters are designed 2 ways; for amount of flow (for one or more fixtures simultaneously) and rise of temp from a specific input temp (water from the ground). If you undersize your WH because you're cheap or uneducated about what's needed for your volume or points of use, then you will def not get the results you expect. Do your homework and size your WH to your fixtures and number of uses simultaneously. Don't get the cheapest one, it never pans out
@@JB-de8ts agreed! I have the largest one available for 4 bathrooms. And we are never in the cold ever. No matter how long we have it on for. Not only that it’s about 125$ cheaper each month compared to an electric water heater. So I’m not really sure what that other guy was talking about.
Great job guys!
I had an instant on back in the 1980’s- loved it- saved mucho $ on gas
Did you buy a fake ID to enter the US with all that mucho you saved ?
In of event of catastrophic proportions if you have a tank water heater say 40 to 50 gals that would go along ways . There are ways to make a tank water heater almost instant.
Brave man with that hole saw directly into asbestos siding with no PPE.
i may be wrong, but i think that's called latent heat of evaporation, its a term we use in air conditioning alot, not that the waters evaporating but if the heat is exiting into the piping that heat is getting soaked by the water, which to me is a BRILLIANT solution
Thank you for all the information 👍🏻
Looks Like Milwaukee is now sponsoring This Old House? See a lot of their tools in this video they are great for plumbers though.
Well the job was done in Milwaukee soooo Milwaukee tools ;)
chillywilly3610 too bad their tools are made in China
Milwaukee is the only one building a lot of these specialized plumbing tools, so you will continue to see more of them in plumbing videos until other tool companies catch on.
True but usually brands that don't have a sponsorship with TOH have the logos' covered.
Aaaa
WORKS GREAT, 5000 DOLLARS LATER !
Have you ever priced a tankless water heater? They are about the same cost as a tank heater. $2,000 at the very high end...or under a grand for not so much. Considering they last 2-3 times longer, they are much cheaper overall. That's not even counting the energy savings.
Don’t forget the labor cost, unless you are DIY
plumbing a lot different in America then in Australia, i did plumbing for 5 years, just installed an instantaneous the other day. Only have to run 3/4 inch for the gas line to the heater, we use copper for gas pipe, and our hot lines are 1/2 inch which is all you need (our cold main lines are 3/4 inch as well). Where most people solder bends, we just use the pipe benders, and most joints are silver brazed (while some plumbers still soft solder, but not near as common, obviously not on the gas line though). But most new houses have poly pipe except the front run from the water meter to the house, the garden taps etc. I like seeing how other countries do things different.
Most manufacturers are now coming out with models that can use 1/2" gas lines which makes installation easier than easy.
Nice job on the install!! Myth the tankless water heater only heats the water on demand....the tankless runs at low heat through the heat ex changer so it isn't a shock to the system when the there is demand for hot water. The savings is so minimum between the tank and tankless hot water heaters it is not worth it to change out the system unless space is needed or the demand for hot water is high enough that the tank heater isn't keeping up with the demand for usage. The savings goes down the drain when you have to descale the tankless system and also goes away on the install. The tankless and tank hot water heaters last about the same time depending on usage, maintenance, and luck. Parts for the tankless are very expensive!!!
1. Most average plumbers are not familiar with how to troubleshoot these when they break.
2. Youd have to have someone from the manufacturer repair it
3. They are not 100% on demand, you have body sprays, multiple showers and a lot of fixtures using hot water especially at the same time the unit cannot heat the water fast enough with the large amount of water flow.
4. Not all plumbing supply houses/hardware stores carry parts for these.
electric tankless water heater not gonna keep up with demand but gas will, in the regular size homes. Also you can put 2 of them
Well I guess living in america sucks then. I might as well move to europe where people actually know how to fix these things and know lots more about them then dealing with the archaic tank type water heater
Btw, I live in Georgia so It's not like I moved here.
Blue Monster, strut and clean lines. Nice install. A fellow Tradesman.
i'm blown away too
The homeowner could step like two feet to his right and not have to duck at all. Way to go director!
OMG I know right! Heeheehee.
I f you have a whole house gas-fired backup generator installed, make sure the guy Generac or Kohler sends out has the knowledge to assess whether the gas supply can run the generator, your gas furnaces, AND an instantaneous water heater simultaneously.
I just bought a house in south Milwaukee. I need to do this. Switch from electric. There is gas available but need to do the conversion. I looked for a video and this was Milwaukee! Thank you. Now to find some help
If by any chance some day you come to NH and want to record a video let me know. I like how you explain everything to the people, I’m an automotive technician and I also explain to customers like you, so they know what is going on with there vehicles. Good videos 👍👍👍
When I look at the code for installing gas appliances, I believe the sediment trap should be installed directly below the vertical gas line, rather than at a 90 degree horizontal tee feed as shown here.
I had a crossover with recirculating pump to have immediate hot water at the kitchen sink (80 feet from the heater) but uninstalled it after it caused major leaks in the copper plumbing. Turns out that the constant flow slowly eats away inside the copper until you get a pin hole leak. Any imperfection inside the pipe including solder or leftover flux are potential points for this erosion to occur. I would like to see TOH address this as it is a known issue for copper plumbing.
They have an older video on copper corrosion. They brought in an engineer with cutaway examples of various corrosion scenarios (stagnation, high velocity, flux, iron).
ruclips.net/video/nD5lMITzx_Y/видео.html
Very interesting. Thanks for the addition.
100% clear instruction...
Gracias muchachos!!! I am getting a tankless water heater, I trust you all.
Water actually goes through the condensing heat exchanger first then the copper heat exchanger, it's more efficient that way
I was thinking that sounded backwards when he said it. You'd have to have the cold incoming water chilling the pipes to get the condensation, while essentially pre-heating the water before it goes into the main heat exchanger.
Excellent video I loved this, very useful!
Surprised to see you here
@@answernotfound5278 I enjoy these videos as much as making them
I enjoy your lawn videos and your grass, in the summer, Is just beautiful!
@@SilverCymbal I think your lawn in the summer is so beautiful
@@answernotfound5278 I really appreciate that. Lots more stuff coming this Spring & Summer too
Lol this person is very fortunate to have all that space to work with. My water heater is in a very small area and is a lot more difficult to work with,
In my opinion I am not really a huge fan of these Tankless water heaters, here's why, There are a lot of bells and whistles on these units, I know that they don't take up a lot of space and they are efficient in many ways but, you are dealing with a lot of extra parts on this heater, the best one in my opinion is the PowerVent tank water heaters, because they have less bells and whistles and they are still energy efficient. That's only my opinion though, everyone is allowed to have an opinion.
I still think tank water heaters are better, we have never had issues with hot waters. We can have 3 showers on at the same time for as long as they want. A better alternative to save money would be the heaters that go directly on the shower faucet.
Me too
> We can have 3 showers on at the same time for as long as they want
That can only happen if your incoming water temperature is very high, you have drainwater heat recovery at every shower, have a *very* large tank (>100 gallons) or a high output tank (e.g. AO Smith Vertex), "as long as you want" being really short, or some combination of the above.
I have a tankless water heater and love it. There are two issues with it which, as long as you know about them, are just fine to live with. Issue 1 - takes a while longer to get hot water is described at 7:22. Issue 2 - Consider doing dishes in the kitchen sink by hand. You turn the water on, then off, then on again, etc. Each time you turn the water off the tankless heater turns off. Then when you turn the water back on and the heater turns on too. Great! BUT some cold water sneaks through the heater before it can get hot. Thus you get a small chunk of cold water sandwiched between the hot water on either side.
cold water isnt sneaking through. there is cold water in the lines that has to get out before the heated water gets to you. terms like on demand, or instant hot water, are no longer used in the industry because of this reason. they now use the term unlimited hot water.
I'm not clear on how this is different from tank water. I've never lived anywhere where I didn't have to wait for the hot water to show up from the tank...seems the same to me in that regard since it's not like the water doesn't cool once it's in the pipes waiting on me. Thanks for sharing this - I happen to do dishes by hand but it's good to know a DW might need considerations on this.
@@lindsaywilliambrown808 - The big difference is that a tankless water heater will provide an endless amount of hot water. A tanked water will eventually run out of hot water especially if you have teenagers! The secondary benefit with tankless heaters is that they are cheaper to run as they only use energy (gas/electricity) when you are using hot water. A tanked water heater is constantly heating water even in the middle of the night, doing dishes or not, or when you are away on a week's vacation.
8:55 Ah, nothing like a firm, moist handshake
Excellent video. I'm buying!!
I think Richard had a bet with someone that he could use the phrase "well hung unit" in a piece that made the air.
Nice, especially as it's Richard
I find it humorous when people say "hot water heater".
this guy is the g.o.a.t. learning a lot from watching this channel .
He Richard installed my viessman boiler NEVER HAD ANY Problems. NUFF SAID.
Viessman good
I already have a thankless family. Why would I want a thankless water heater?
Expansion tank requires only on a closed loop.
Wondering the same thing. Only needed when heating water IN A CLOSED SYSTEM. Tankless only comes on when faucet is turned on, creating an OPEN SYSTEM.
@@Isaiah5417GdLk because they have recirc pump on and cross connection in the system, it's closed system when pump is running
Electric car station in the corner..these guys are awesome!
great videos, love the show.
Watching This from europe, i’m thinking why don’t you use a combi heater. It heats the water. But also heats the water for the radiators trough out the house. Which you could implement to the hot air system you all seem to have in the house.
J.D. Willemsen just like feet and inches they like to use archaic methods.
Most newer American homes use forced air HVAC systems, which accommodate air conditioning. Radiator systems aren't unheard of, but not especially common.
Sup3rFly88 imperial is better than metric in every single real world application
It just hasn’t been out long enough for installers to be comfortable with the installation yet. And only a few companies have brought that kind of tech yet.
what radiators are you talking about, this has forced central air and natural gas heat
Crimping copper fittings instead of sweating?
Phil Scar That's the new way. He has a video on it.
Yep pro press is the future in copper its required in some commercial construction now
Really! Who would have thought a crimp connection would replace a legendary but true and tested method of a sweated connection.
It is you can also do it for black pipe natural gas. The industry is changing copper in general isn't as popular as it was say 10 years ago pex is taking over. The big thing with sweating pipe is the possibility of fire, and it does happen and when it does it can take a whole framed building out.
Few year ago in Boston a plumber caused a major fire in one apartment while doing repair work soldering pipes, one fire fighter was killed. Since than permit is required to do any kind of soldering work....Pro Press is awesome.. but just a bit pricey
Hi, do you have an in-depth water heater (gas or electric) replacement video? I have basic knowledge of how to replace but only some of the why’s.
I’d really like to know the science behind why each typical step is performed. For example:
1.shutting water off at house valve vs. cold water valve to heater.
2. opening the cold side, hot side, or midway on all fixtures to drain the system and how opening the fixtures creates vents to help drain the system.
3. How to drain the water heater gravity vs. transfer pump
4. when to know that the system is drained and your good to go to cut out heater
Thanks for your great content!
Old house rocks.
🤔 how did he installed it. Because all I got was an overview.
Need to be licensed. You could blow up the block if you don’t know what your doing..
The real lesson here is, pay $5k to have it done.
Can these be used if you don't have gas?
I believe they do have electric options, fundamentally the same, just running on electric
Thank you
I had the same question. I must invest in one of these.
They make electric ones, BUT the whole house electric tankless units need about 200 amp, that is the typical electric service to modern houses. So the electric ones aren’t very practical.
It takes about as much electricity as running a 3.5ton HVAC... Not very energy efficient.
Hi I really enjoyed the video very informative. Would you by chance know where the shower enclosure could be found. Thanks
I work on Andrew's water heaters gas fired I think they came from the U S .VERY GOOD it was part of a system at Hampton court palace..back in the day .
Most efficient way would be to have small hot water heaters near each fixture that demands hot water. I believe other countries tend to do it that way (for example, have a small unit above the shower head dedicated to heating shower water etc)
What's with the complaints about waiting for hot water? You have to wait with any water heater, tank or not.
@peter d
You're grammar makes no sense.
Richard Iam a plumber and I love the American way .
These thankless hot water heaters are fantastic. Very little space required, very low cost and good for the environment. Why consider a hybrid hot water heater that will cool your living space?
The explanation of it’s functioning is appreciated, but has to be back to front. The water can’t flow through the condenser _after_ it’s been through the heat exchanger - a) the gasses are then lukewarm, and b) the water is hot, so you get no condensing. The cold water actually flows in the opposite directly from the hot gasses. That way the lukewarm exhaust gas encounters cold water. It condenses and slightly warms the water, which then passes through the heat exchanger.
Thanks for the video - agree with others with would have been good to actually see the installation, considering the title of the video.
Hear in FL we could never vent directly under a window.
Shawn Wenrich
You can have a tankless unit installed on the exterior of your home...
Hahaha
Still can't mount an outdoor unit under an interior window.
To my knowledge, you can’t do that anywhere.
Unless you like breathing carbonmonxide!
Please make a video about installing an hidroneumatic system, In my town most of the day we have no water
Brilliant!
We have seen these in RIO for decades, however never seen a expansion tank !
yeah it is not needed, he even pointed to the same valve that will release the preassure IF it gets too high... *rolls eyes* and the circulation trick is not needed either, even with a tank heater you need to wait for the hot water to arrive at the faucet, no change there AT ALL. Running circulation just means you heat water that will then just cool down in the pipes afterwards anyways + needing expensive valves + a pump... The tankless heater is plenty enough
The expansion tank is required by code in municipalities where there are check-valves on the domestic water supply.
@@LiLBitsDK if u got a big system allot of radiators and piping u need 1. Else u can refill the closed system everytime after ur heated ur house because the presure difference is so big between heating and not heating. the automatic valve will spit out so much when ur heating that when the system is cold after heating the pressure in the closed system dropped way too much.
With the re-circulation setup, you're kind of losing much of the benefit of a tankless system, as you end up creating a small and often poorly insulated tanked hot water system.
If you're looking at going to a tankless hot water, then it is a good idea to strongly consider a short-run system instead of a central re-circulation. That is, don't have a heater in the basement, put it under the sink, or in the wall behind the shower, and minimize the distance between the heater and where you're actually using the hot water. (Yes, this can be difficult to retrofit in some homes, but it is a small concession in design to keep in mind if you're doing new construction or major renovations.)
Sitting down to evaluate your options may mean you're going with multiple smaller on-demand heaters spread around a home to come out with the most cost effective and efficient system.
He did say you can set it to start circulating at certain times of the day ?
While you can set it to help limit how much efficiency you lose over the course of a full day, you will still be hard pressed to get the same overall efficiency in a re-circulator setup as you will in a short-run tankless.
If nothing else you should remember to be very careful to properly insulate your hot water runs and keep them isolated from heat sinks, and ideally use a system that can auto inspect the crossover valve usage - You really don't want your tankless system trying to keep up if that valve jams open.
Not sure how common they are on mainstream commercial hardware, but I for one get a bit of a kick out of things like heating systems that can email me a monthly report, or send out an 'emergency' email if it detects something weird going on with itself.
I agree, can't beat the shortest run but if your lines are Super insulated, and they can be, I know because I was a Union Pipe insulator for 13yrs on commercial buildings, you can keep your losses down to about 6% over a 100ft run. And those one-way valves that go under the sink that he used are pretty much fail proof and work for decades with no problems.
Very good tips and good Learning project do it yourself video
weve had them in the uk for years,the only problem is in time the diaphram the boiler goes, when this happens you will need to bring the pressure back up.