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Michael & Isabel,
When we are in those temps a tank will last 3 to 4 days.
The furnace runs a lot but the burner is only on part of the time.
The blower comes on and blows a minute or so before the furnace lights and then if the temp gets to hot the burner will cut off until the temp drops then if the thermostat is still calling for heat it will relight.
Once the thermostat is satisfied the fan keeps running to get the heat out of the unit and ducts.
This way the fan may run for five minutes but the burner is only running maybe two.
We get two to three days when the temp is in the low twentys.
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Hybrid Mode
