(Some so-called ductless air conditioners are actually heat pumps.) They tend to cost a little more than AC-only units but less than the combined cost of a new heating and cooling system.

Help is at hand though courtesy of [petey53], who made his own ground source heat pump for his Toronto house using a pair of window-mounted air conditioning units. A custom copper “trombone ...

What to look for in a portable air conditioner Btu and room size: One British thermal unit (Btu) equals the heat needed to raise one pound of water by one degree Fahrenheit. In cooling ...

Carrier has launched a new series of air-to-water heat pumps for applications ... “AquaSnap 30AWH-P can be cascaded with up to 4 units for heating and cooling requirements in light commercial ...