I suppose that anybody who knows his physics, or heat pumps, or thermal budgets knows this kind of thing, but I just discovered something interesting.
We're in the middle of a really nasty cold spell, so I finally got out to the Morton Building and found the following temp. values.
General building--floor level: 32 F.
15 X 42 fish room with water tank--34 F. floor level.
Inside the insulated hood--41 F. floor level and 44 F. highest level.
Water in 150 gallon tank--54 F.
I was completely surprised that the cold building that was only insulated R-4 during a cold snap where outside temps are averaging about 5 F., did not have any impact on the tank. The heat energy in the well water was apparently plenty to overcome the cold air temperature.
Keep in mind that water is being injected at less than 1 gpm.
The yellow perch were in incredible shape and treated me to another agressive feeding, oblivious to the frigid outdoor weather. This is VERY encouraging!
