tm wrote:
Usmiech wrote:
Edwin Pawlowski wrote
DoDa wrote

...Put a dog in it.

Seriously, if the house is the right size, the dog will give off
enough heat to maintain itself. You can insulate the house a bit if
you want...

That is plain stupid!!!!

No... An ASHRAE-standard 50 pound dog has a basal heat generation of
124.10 Btu/h (vs 354.9 when "normally active"), so a 2'x4'x2' tall
bedchamber in the upper part of a doghouse with a warm air pocket
above the entrance and 32 ft^2 of exterior surface could stay 70 F
on a 30 F day if 124.10 = (70-30)32ft^2/Rv, ie Rv = 10.3, eg if it
were insulated with 1" of foil-faced foamboard.

Nick