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The furnace is part of an HVAC or central heating system used to generate heat. Typically this is done with gas, a heat pump, or an electric element. For hot water and radiator based heating, use the boiler tag.

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1 answer
681 views

What does this device on my new furnace do?

I had a 35-year old oil furnace replaced recently and the new furnace is obviously more complex and has many safety features the old one didn't. …
Carey Gregory's user avatar