Control for dual heating system including a heat pump and furnac

Details Control for dual heating system including a heat pump and furnac Control for dual heating system including a heat pump and furnac

1992-07-13

1993-11-09

Ford, John K.

Heat exchange

With alarm, indicator, signal, register, recorder, test or...

Remotely controlled inspection means

165 29, 236 46R, F25B 2900, F25B 1300

Patent

active

052594459

ABSTRACT:
A programmable thermostat is provided for the selective operation either of a fossil fuel furnace or a heat pump. The thermostat is programmed to operate the fossil fuel furnace when the outside temperature is below a preselected temperature range, and to operate the heat pump when the outside temperature is above the preselected temperature range. Within the preselected temperature range, the fossil fuel furnace may be operated during certain time periods and the heat pump may be operated during other time periods.

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