- Furnace Retrofit Pak
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Product description: An array of Solarsheat air collectors can be used
to retrofit any furnace. At least four SolarSheat 1500GS solar collectors
attaches to cold air return. Whenever the SolarSheat air collectors are warm
and there is a call for heat from the solar thermostat, the furnace's fan and
solar fan turn on, blowing solar heated air into the home through existing
ductwork.
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