How to Retrofit Radiant Heating in a Bathroom | Ask This Old House
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- Опубликовано: 19 апр 2024
- In this video, This Old House plumbing and heating expert Richard Trethewey helps a homeowner solve a cold spot in their home (the bathroom) radiant floor heating and an advanced heat exchanger.
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When a homeowner upgraded his old boiler to a new, combi system that worked with his heat pumps, he noticed he just could get his bathroom to warm up. With the idea to tap into his boiler’s water supply to install radiant floor heating in mind, the homeowner called the team at Ask This Old House for help, and Richard Trethewey answered.
Where to find it?
Richard mounts the heat exchanger [homedepot.sjv.io/XYeaBX] by securing it with screws [homedepot.sjv.io/vNaKdv]. Then, using a pipe cutter [homedepot.sjv.io/KjN65N], he cuts to allow room for a T-fitting [homedepot.sjv.io/LXNL6a]. Richard uses compression connections [homedepot.sjv.io/DKN6oy] and push-to-connect fittings [homedepot.sjv.io/GmNyWE] to run the piping from the T-fitting supply and return of the heat exchanger.
Richard mounts the manifold by securing it to the plywood with screws. He then uses a pipe cutter to cut and connect the piping from the supply and return of the heat exchanger into the supply and return lines on the manifold.
Richard mounts the radiant heat transfer plates [homedepot.sjv.io/NkqxLO] to the underside of the subfloor using screws. The homeowner snaps the PEX piping [homedepot.sjv.io/75N6P3] into the mounted channel plates up and down the joists for the length of the room and then packs fiberglass insulation [homedepot.sjv.io/baoBMB] on top of the piping to ensure that all the heat generated by the radiant goes up towards the bathroom.
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Materials:
T-fittings (solderless) [homedepot.sjv.io/LXNL6a]
Compression connections [homedepot.sjv.io/DKN6oy]
Push-to-connect fittings [homedepot.sjv.io/GmNyWE]
Transfer plates [homedepot.sjv.io/NkqxLO]
PEX pipe [homedepot.sjv.io/75N6P3]
A heat exchanger with pumps [homedepot.sjv.io/XYeaBX]
Screws [homedepot.sjv.io/vNaKdv]
A variety of check valves [homedepot.sjv.io/rQPKmG]
Pressure relief valves [homedepot.sjv.io/g1Enx5]
Expansion tank [homedepot.sjv.io/zNVKom]
Fiberglass insulation [homedepot.sjv.io/baoBMB]
Tools:
Power drill [homedepot.sjv.io/R50Wna]
Propress for solderless connections [homedepot.sjv.io/KjN6Ma]
Oscillating tool [homedepot.sjv.io/g1LKDB]
Rubber mallet [homedepot.sjv.io/nLVg7a]
PEX cutter [homedepot.sjv.io/KjN65N]
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From the makers of This Old House, America’s first and most trusted home improvement show, Ask This Old House answers the steady stream of home improvement questions asked by viewers across the United States. Covering topics from landscaping to electrical to HVAC and plumbing to painting and more. Ask This Old House features the experts from This Old House, including general contractor Tom Silva, plumbing and heating expert Richard Trethewey, landscape contractor Jenn Nawada, master carpenter Norm Abram, and host Kevin O’Connor. ASK This Old House helps you protect and preserve your greatest investment-your home.
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How to Retrofit Radiant Heating in a Bathroom | Ask This Old House
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Is there a thermostat in the bathroom? How does it know when to call for heat?
I love the expantion tank hanging on a sharkbite fitting.
I was thinking the same thing
@@rmservices5426 And up side down
WOW, YOU PUT THAT GUY TO WORK. GOOD JOB
What would be a good idea is to label things with a Sharpie so the next owner will know what everything is and where it goes. I always date the work I do so later folks can know when it was installed or built. I wish I had a basement that big. So much potential there.
Great show
Cool system.
I have radiant heating in my basement abd garage flooring. We have a tankless water heater. But it is s combi system. So it heats domestic water for showers, taps ect. But we also have glycol in our lines in the basement so it doesn't freeze in the winter. We live in canada and this is totally the way to go!! We are very hsppy with it. The garage is toasty warm and the basement is amazing. Such a cool system.
I like how the video description now shows the materials and tools used with links.
Yeah, like the shark bites for the win lol
I realize its subjective but can you guys start providing ballpark cost and names of products or links used please?
looks good, the penetration through the joists have 2 inches of joist left on top?
Mounting it with drywall screws, nice touch
Only thing I’d be concerned about is it’s probably too many BTUs out of the water heater to heat the radiant and domestic hot water
Paul Simon: one of the greatest American songwriters/composers.
Would rather see that receptacle higher than the water piping. Any leak makes for a potential for shock.
At least GFI that close to piping, yah
@@allenellisdewittcould be on a gfi breaker or fed from another gfi elsewhere in the basement since basement outlets should all be gfi
So he took out a whole house radiant system to install heat pumps just to reinstall another radiant system in one bathroom? Some people just have money to throw around. This bathroom was the perfect candidate for a in-wall electric heater. This seems like overkill for a single bathroom 😅.
I honestly would have simply upgraded the boiler for a high efficiency one and kept the original system.
Sounds like the house was on heating oil... so it would require a propane supply for a 90+ boiler. I would have done that route and setup a gas stove top. Nothing worse in the world than cooking on electric. A SS indirect hot water tank will last many years compared to the hybrid water heater.
The expansion tank is suspended from a sharkbite?!?
So is the original one on the. main unit.
That is an EXTREME level of work for what can be handled by an electric wall heater
What an overly complicated (and expensive) solution to a minor problem. A simple electric baseboard would have been fine. He’s got solar, so if it was grid-tied, the solar credits would more than cover the higher watt-hour usage throughout the year. For a typical homeowner, the payback for that radiant install would likely be never. Plus, the heat pump water heater is stealing the heat from the surrounding space.
What was that sawzall right angle drill nonsense 😭
The real,problem is that the house is too big.
I would have just pit in electric baseboard heating.
And the expansion tanks are not installed right lmao...............................
Space heating with a heat pump water heater is a terrible idea. The heat pump only puts out around 4000 BTU. This system might use half of that between the heat load and losses along the way. Or in other words the heat pump water heater is going to have to run an extra 12 hours a day to satisfy the new demand, in addition to what it's already doing for domestic hot water. Adding another zone will probably exceed the capacity of the heat pump. Sure there are electric resistance elements it can use, but then your efficiency drops by 4x. They are great for typical domestic hot water needs, but the heat pump water heaters are not sized for anything more than that. Is it even listed for space heating? Some water heaters are, but many are not, because they aren't designed for the extra duty cycle. Ultimately this system will be only marginally more efficient than an electric heater, but much more complex and expensive. If you really want radiant, remove the tile and replace with electric radiant under new tile.
And what if you are close to running out of hot water after a few people shower? Does ice cold water circulate through the floor? With a couple people showering and two zones calling for heat, I think you could exceed the output of even the backup resistance elements in the water heater.
Gosh I’m confused.
What a jumbled use of sharkbites and pipes going every direction but straight. They should've moved that water heater closer to the corner before even starting that job.
That would be more work then you think and I fail to see why it’s necessary, beyond the fact some people think the current setup is too messy looking, which is purely esthetics and doesn’t effect performance if the system..
OR we could give the young man credit for tackling a job that most home owners would find daunting. There are a few things that could have been done differently, but it’s in and works as it should. This is pretty cool in a world where many young people don’t have the skills or lack the motivation to do such things.
@@markantinore6418 I do give the homeowner credit for getting the water heater in. It's the job the pro plumber left behind that makes me cringe.
Personally I prefer pex everything these days. You can do a super clean install with how easy it is.
Those aren't shark bite fittings they are pro press connections. They look similar but are completely different.
That will be $4,000
$1700 worth of sharkbites used when putting in that hot water heater lol
Wayy too much work and money to just run radiant heat to a single bathroom. Should have gone with a ductless mini split or an installed electric heater. Also should not have used insulation with a vapor barrier at 7:02 and the pex should have insulation on the section between the pump and aluminum plates
Electric heater is $20 at Walmart. If you wanna be real fancy, you can mount one in the wall for about $100. This setup is absurdly over engineered and overpriced.
I agree. Get a 240v wall space heater and be done with it.
Cringing over all those SharkBites.
Lol anyone can be a plumber using sharkbites
@RichBshine1972 yeah, they're good for temporary or emergencies or where failure won't cause lots of damage.
Wow some horrible work this time guys
Lefties: HEAT PUMPS ARE THE FUTURE! Reality HEY LETS INSTALL SOME RADIANT HEAT HEAT BECAUSE THE HOUSE IS COLD HERE AND HERE
That’s still much smarter than burning fossil fuels
You can get whole house heat pumps that tie into ductwork but sounds like he replaced radiators so he had no ducting
@@e5b7-wr811ouhih why exactly?
@willdogsdroid modern heat pumps get up to 300% heating efficiency by basically running an air conditioner in reverse. It moves heat around instead of just generating it.
The homeowner in the video mentioned an oil heater so that would have been incredibly expensive to run in winter and I wouldn't be surprised if his home heating costs went down considerably.
But given it's a retrofit, you end up with some mis-matches like the bathrooms being too small to properly fit an external wall-mounted unit inside. Something else would need to go on which is what it bring done here.
I'm actually doing something similar because we want air conditioning in the bedrooms so we are getting a heat pump to do it. This will compete with the radiant heaters next winter because the bedrooms and bathrooms share zones so I will need to do something in our bathrooms until we can renovate for the heated floors.
Are those "lefties" in the room with us right now?