Heat pump sizing

[gary_g]

Here's a little more info:

He's specing a 15 kw heat strip on a FHP model GS036, two stage.
Closed loop, central Michigan area.
120 year old brick farmhouse R-50 attic, approximately r-10 wall cavity foam.

Thanks for the help so far,



Dave

http://www.fhp-mfg.com/newpdfs/GS_GT/GS_Spec.pdf

The specs for that 3-ton unit show a max of 47,800 btu based on entering water temps and entering air temps (if I am reading the spec sheet correctly).

[gary_g]

If Infinite possibilities provides infinite opportunities, wall do infinite walls provide.

Prison.

[beenthere]

Infinite rooms of infinite possibilities.

[housesmart]

are you sure you have the ductwork/ electrical supply for such a system?

most older homes in our area (Vancouver, mild climate) have difficulties with the duct size (heat pumps move a lot more air than furnaces, I saw the ductwork for a new home with a geothermal heat pump and it was massive) or power supply to run an air source heat pump which will heat only when it is above 4C outside (39F), never mind installing a geothermal unit to supply all the heating

[dogoodman]

The house presently has baseboard heat so new ductwork is part of the install. Have a little problem getting to the 2nd floor but I have a room I can use just to run ducts through.

Upgrading the electrical (hydro in Vancouver, I watch too much Holmes on Homes) to 200 amp. Screws up my transfer switch on the generator but it's solvable.


Dave