05-03-12, 04:09 PM | #10 | ||||
Apprentice EcoRenovator
Join Date: Aug 2010
Location: Windsor ON Canada
Posts: 229
Thanks: 4
Thanked 30 Times in 22 Posts
|
Quote:
Quote:
Quote:
2. I have 6" walls with R-22 Roxul insulation 3. Windows are Double with argon and low e coating. 4. Roof has 2 layers or the same Roxul , so R 44 Quote:
I didn't make measurements for DHW. I only noticed temperature in underfloor loop. It is easy to see because I have 2 thermometers right on manifold. As I mentioned before on coldest days loop temperature was about 95F in supply manifold. My DHWT is separated from heating loop by HX. It is illegal to run DHW underfloor because in low underfloor loop you have a chance to grow bacteria (Legeionellosis). For this reason in Canada you have to keep your DHWT at minimum 140F. Is it Safe To Turn Down Your Water Heater Temperature? : TreeHugger This is why you can see mechanical mixing valve in parts list. The HWT you can see on picture is an electric 80 gal HWT. I use it as a storage tank and it shares the same water with underfloor loop. I took one element out and used hole for extra water connection. I kept second element just for emergency but never connected power to it. I use one of its thermostats to turn on/off SS pump(primary on DHW/HX side) and secondary pump from HX. I had no idea how much BTU I needed. So I took some extra steps. 1. Raised temperature in DHWT 2. Added extra HWT (storage tank) 3. Kept one electric element in storage tank just in case main DHWT can't keep up. But now I think I could skip the storage tank and take hot water to loop directly from HX. Last edited by Vlad; 05-03-12 at 04:26 PM.. |
||||
Tags |
diy, heat pump, hydronic, pex, radiant |
|
|