Furnace, heat, efficient, $$$, expensive, reliable, safe, green, AFUE, protection, energy, BTUs.
A new homeowner to someone who has lived in their house for 20 years to a person that isn't old enough to spell the word 'furnace', we all know heat is a necessity. It's second nature that when we are cold, we need to be warm. It's so habitual that truly knowing about your furnace and what it entails is overlooked.
A furnace is designed to add heat to your home.
(we all know that...I hope)
okay, that was a joke. When I said simple, I didn't mean that simple.
Read on.
HOW A GAS FURNACE WORKS
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