Thermostat help

tw · 01-04-2007, 08:39 PM

A heat pump works by trying to cool outside air - thereby heating inside air. However as outside temperature drops below 40F, the heat pump has little outside heat to pump inside. Therefore (and unlike other heating systems) a heat pump must also have the 'emergency heat' function. That is typically electric heat - very expensive. Thermostat must have extra functions to control that 'emergency heat' function.

Heat pumps generally are most efficient at latitudes and temperatures of North Carolina.

01-04-2007, 08:39 PM	#13
tw Read? I only know how to write. Join Date: Jan 2001 Posts: 11,933	A heat pump works by trying to cool outside air - thereby heating inside air. However as outside temperature drops below 40F, the heat pump has little outside heat to pump inside. Therefore (and unlike other heating systems) a heat pump must also have the 'emergency heat' function. That is typically electric heat - very expensive. Thermostat must have extra functions to control that 'emergency heat' function. Heat pumps generally are most efficient at latitudes and temperatures of North Carolina.

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