Control for dual heating system including a heat pump and furnace
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 9, 1993
Grant Date -
N/A
app pub date -
Jul 13, 1992
filing date -
Jul 13, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
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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Family
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