Heating & Heat Pumps
What Is a Furnace?
A combustion (gas or oil) or electric-resistance heating unit that generates heat directly, as opposed to a heat pump, which moves existing heat.
This definition is pending sign-off from a licensed HVAC reviewer.
Why It Matters to You
A gas furnace can produce more heat output than a heat pump during a rare hard freeze, which is why some Alabama homes keep one as backup even alongside a heat pump.
Practical Guidance
If your furnace is over 15-20 years old or you're seeing an inconsistent flame, unusual smells, or rising bills, ask for an inspection before the next cold snap rather than waiting for a mid-winter failure.
See it in context
→ Heating Installation & Replacement
Related Terms
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