Hi all, I'm interested in adding a supplemental heating source to my home. my fuel sources are limited (oil/electric) current main heating is an oil fired FHA furnace. I was originally looking at adding underfloor electric radiant, but I think maybe I should consider a hydronic radiant. the area I'm looking to heat, at least initially is roughly 350 sq. ft. Its already finished with hardwood and tile, but I have access to the sub floor from below (heated, insulated finished basement) my current water heater is electric, 40 gal (http://www.americanwaterheater.com/products/productDetails.aspx?ID=1002) my water heater is metered seperately from my main, @ 13.5 cents per kWh.

first question, is it adviseable that I pull heated water off of the existing DHW to supply the radiant? If so where does the heated water go (after running through the radiant)?

Or, should I be looking at somthing like this http://www.electromn.com/gen/emb.htm for supply?

I'm really just looking for the radiant to be run at night, and on weekends. I find that with the house being two stories the main level is much colder (stack effect) than the upstairs, it makes it very uncomfortable down stairs. I've already replaced windows, but with 20 year old R11 2x4 walls I think I'm SOL for the most part with out investing alot of time/money into re-insulating etc. I really appreciate any info/feed back

thanks!

So, I just did a quick heat loss calculation over at Warmly Yours. Based on that, they are advising:

• The recommended WarmlyYours product for your floor type is the TempZone, which offers 15 Watts power per square foot.
• For a room of 350 square feet, the WarmlyYours TempZone can provide a maximum of 13435.0 btu/h (3938 Watts).
• Based on your heat loss calculation, the WarmlyYours heating system will provide 2811.0 btu/h (824 Watts) in excess of what is required to heat your room.

If I translate that into an equivalent product from these guys http://www.electromn.com/gen/emb.htm - it looks like a mini-
boiler with these specs would do the trick...

Model #	Volts	Watts	Amps	kW	Phase	Btu/h	CB
EMB-S-4	120	5,000	41.67	5	1-60	17,065	N/A

 ...am I on the right track?

thanks again