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Old 01-04-2012, 12:41 AM   #1
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DIY Hydronic Radiant Floor Heating?


Hello, I am in the process of completely renovating my home. Recently I had to tear up part of the floor to replace a beam that had been damaged by a fire that happened before I bought the house.. I decided that this would also be the best time to clean out the crawl space (mission complete). Now, I am contemplating installing Hydronic Radiant Floor Heating to the under side of the wood floor from the crawl space. However, I am not liking the prices I'm finding for the system installation. Does anybody know if its possible to do this project yourself? It seems to me that all you'll need is the tubing, a mounting device for the under side of the floor, a pump of some sort, and a hot water tank.. I'm sure its more complex then that but that's why I came here. Also, every time I search this topic online most all I find is companys wanting to sell me their diy kit. Are any of these company's legit that you know of? Thank you all!

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Old 01-04-2012, 06:25 AM   #2
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That is a project that many have done---Look in your area for a hydronic heating supplier--
Many have an engineer that will work up a system for you that will work and meet local code.

You over simplified the system a bit--you need an auto feed valve--back flow valve---expansion tank and a few other items---

But,yes, this is well within the scope of a person with good mechanical skills and some common sense,

---Mike----

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Old 01-04-2012, 11:35 AM   #3
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Thanks a lot Mike!
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Old 01-04-2012, 01:48 PM   #4
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Ayuh,... As Mike says, it's abit more involved than you portray, but it's not so bad...

I did a complete system in my 100 year old rental house last year, full in-floor, 'n an oil boiler...
My tenant just Loves it...

We(tenant, 'n I) stapled up the rubber tubing(not pex), then reflex-tex, then stuffed the bays with fiberglass insulation...
I bought a used Weil- McClain boiler, 'n rigged up my own design primary/ secondary manifolding system...


It's set up for the zone that ain't there yet, 'n DHW which will be done at a later date as well...
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Old 01-04-2012, 06:13 PM   #5
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Awesome, Thanks for posting! Have you noticed savings on your heating bill?
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Old 01-04-2012, 06:21 PM   #6
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Hydronic heat is the most economical and comfortable heating available--I have it in my house--

The heated slab in the basement is so nice---Next house I might put it into the floors on the main part of the house.
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Old 01-05-2012, 01:43 PM   #7
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Travis:

There are several options of installing radiant floor heating.

As you mentioned, there is the under floor option. If you select this method I would recommend using extruded aluminum plates with insulation under the floor.

There are also several above the subfloor options as well. That may not be an option if you do not want to remove the rest of your finished flooring.

Either way it may be a DIY project if you have enough mechanical ability. However I would invest some money in getting someone to help you design the system. Feel free to contact XXXXXXXXXXXXXX

Last edited by oh'mike; 01-05-2012 at 02:48 PM. Reason: Removed contact number
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Old 01-05-2012, 02:51 PM   #8
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Welcome WARM BOARD----Thank you for the helpful and informative post---

Please read the posting rules--contractors may add links in their signature line but not in the body of the copy----

Head to introductions and say " Hello"----Moderator----
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Old 01-05-2012, 09:41 PM   #9
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DIY Hydronic Radiant Floor Heating?


you need to calculate your heat load so you know how much piping you will need and the spacing. If you google it you will find a couple of internet suppliers who will also give you plenty of engineering help if you buy their system. You can actually use your domestic hot water as your heat source. (Floor heat is generally 130 degrees or less.)

I did it at my last house 12 years ago but screwed it up. I did it over a concrete slab and the system couldn't maintain a temperature warmer than 60 degrees in the wintertime.

Live and learn.

If you can sweat pipe and do basic handyman work it is not a bad job.
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Old 01-06-2012, 10:40 AM   #10
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DIY Hydronic Radiant Floor Heating?


Quote:
Originally Posted by Travis89 View Post
Awesome, Thanks for posting! Have you noticed savings on your heating bill?
Ayuh,... I can't answer that question,...

I removed an ole rotten beat hot air furnace which did an Ok job, 'n replaced the whole shebang...
I've also never heated the house at normal temps for a season,...

When I bought it, 'n remodeled, I keep the temps quite low...
That winter, it ran almost the entire season on 275 gallons..
But, setting the temps to 45 at night, 'n 60 while I was workin', ain't a way to compare...

The tenant pays his own heat, 'n I haven't asked what he's burnin'...
But,...
He tells me the "Comfort Factor" is worth the effort...
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Old 08-06-2012, 01:56 PM   #11
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Hey there,

We've recently completed such a project as a complete DIY solution (closed loop, on top of the subfloor underneath hardwood). I'm posting about some of our experiences here

http://pieschefamilyhomeimprovement.blogspot.com/

I'm still sifting through photos from the installation, but I'm updating almost daily. Hopefully some of what we've learned during the install can help you!
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Old 08-06-2012, 04:45 PM   #12
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You can actually use your domestic hot water as your heat source. (Floor heat is generally 130 degrees or less.)
.
Terrible idea, unless you like bathing in legionella bacteria. Get a heat exchanger and keep the systems from mixing with each other. (And yes, I know there are very few places its against code to use domestic hot water for space heating, doesn't make it a good idea)

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