Edwin Pawlowski wrote:

"PopRivet" wrote in message

...Simply stated, it takes a LOT more energy to drop the
temp a degree than to raise the temp a degree, because
of the methodologies. The technology for increasing
temperature is simply much more efficient that that for
lowering the temperature.

I'm afraid you are incorrect, Mr. Rivet. Think "COP = 3."

Take the window AC unit and mount it backwards so it exhausts from the
condensing coil the heat into the room.

In wintertime, with the cool side in a damp basement stairwell...

Would the effect of running it raise the temperature more or less than
a heater that gives of 5,000 Btu of heat?

About 30% more than 5000 Btu/h, given compressor and fan motor powers.

Nick