: Lowest upfront cost ($2,500–$7,000 installed) but significantly higher monthly bills, especially in cold climates. They are quieter and safer as they don't produce carbon monoxide.
: The most popular and cost-effective for operation. It requires a gas line and venting, heating homes faster than electric models. how to buy a furnace for your home
: Common in colder regions like the Northeast; provides powerful heat but requires regular maintenance and on-site fuel storage. 2. Determine Efficiency (AFUE) : Lowest upfront cost ($2