how are does the heat source in air
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5
Answer:
Die to sun extreme Radiations conditions...
Answered by
34
Answer:
The heat source can vary. It can be a propane furnace, natural gas furnace, heating oil furnace, or an electric furnace. ... Although the most common source of heat for a forced air heating system is a furnace, there are geothermal heat pumps and heat pumps as well.
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