Gradient's advanced window unit can heat and cool 500 square feet, all without needing any fancy electrical work. I saw it at ...

REFRIGERANT SWITCH: A Greenheck DGX-P116 Makeup Air Unit. Greenheck Fan Corp. has begun offering direct ... use 50% less refrigerant, and transfer heat 40% more efficiently, Greenheck said.

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 ...

These are the three types of ducted home heating systems: A furnace blows heated air through ducts, and the heated air is ...

Now available in the North American market, the manufacturer says these heat pumps work with new AI technology and reportedly ...