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New Home, Which heat source????
First off, this is a great site. Some of you guys have the patience of Job. I have been a long time lurker and this is my first post.
New construction in Freedom NH.
2350 ft² house, 2 story salt box design. VERY open floor design. no cathedral ceilings.
Used Uponor Advanced Design Suite 7.3.0 to do the heat analysis.
27.7 kBTU/Hr heat loss.
Concord NH data: -2°F, 20MPH Wind
Basement: 4 loops of pex in the concrete slab. (850 ft², 12" spacing, 8.5k BTU/Hr loss)
Main Floor: Plan is 4" concrete slab with pex, (850 ft², ?" spacing, 12.6k BTU/Hr loss)
Upper Level: Up in the air, (650 ft², 11.3k BTU/Hr loss)
According to the Uponor software, if I do all the floors in radiant, I don't need more than 100°F water to heat with.
I looked at the FUEL VALUE & POWER CALCULATOR from http://www.fpl.fs.fed.us/products/publications/specific_pub.php?posting_id=17526&header_id=p
Electricity from PSNH is $0.157 kWH
Pellets can be had for just over $210/ton in the summer.
Propane is what it is. And I don't see it getting much cheaper. ($3.70/gal range in Aug.)
The house is sited so I have a large southern exposure. Solar hot water?
So, I am confused.
What am I forgetting? Which heat source should I design in?
I would be open to Air Source HP. Just don't know how to plumb that in. Would like to go radiant (low water temps) but wife also wants AC on the two upper floors. Is there a reasonable multi-split that can do wall units, DHW, and Heat? Or am I asking too much?
Hope this wasn't too long didn't read (TL DR)
Building a house in NH