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-   -   Heat pump vs in floor heat (http://www.diychatroom.com/f17/heat-pump-vs-floor-heat-65750/)

mugen 03-01-2010 07:47 PM

Heat pump vs in floor heat
 
What is more efficient a heat pump or in floor heat with electric boiler.

I'm building a new house and the main floor has 1500 sq feet and the basement has the same. It will also have a 24X24 attached garage. I'm putting in in-floor heat and will also put a heat pump primarily for the AC. I definitely want the in-floor for the comfort. That being said I was under the impression that heat pumps are more efficient. If this is true would it be more efficient to run the in-floor at low. Just enough to get the floor warm and then bring up the rest with the heat pump. Or will the fact that I would be running 2 units(heat pump and boiler) defeat the purpose.

beenthere 03-01-2010 11:15 PM

Depends how well you insulate the slab. using electric. I hope at least 2" under the slab, and as much as you can get on the perimeter.

mugen 03-02-2010 05:09 AM

2" under slab and foam insulation in the walls

beenthere 03-02-2010 05:11 AM

Quote:

Originally Posted by mugen (Post 408182)
2" under slab and foam insulation in the walls

Don't forget the perimeter insulation for the slab. or you'll pay the price for years to come.

http://resourcecenter.pnl.gov/cocoon...inline/515.jpg

houseinthewoods 03-02-2010 09:56 AM

There are heat pumps out there that can heat water for radiant floors. You didn't mention ground-source heat pumps, but we're looking at a Waterfurnace Synergy that has forced air heating and cooling, and can also heat water for radiant. I'd bet there are others out there...

mugen 03-02-2010 08:18 PM

I will not be going with a water source heat pump. So it will just be a regular heat pump and a boiler. Also yes I will insulate the perimeter of the slab.


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