Adding natural gas service to a propane- or oil-heated home costs $4,000 to $8,000. A whole-home heat-pump retrofit costs $12,000 to $22,000 but qualifies for IRA tax credits and state Home Energy Rebates that can compress the net out-of-pocket by 30 to 60 percent. The 20-year ownership math favors heat-pump electrification in most US households when incentives stack. Here is the side-by-side cost analysis and the decision tree by climate zone and current fuel.
Upfront cost comparison
Gas conversion: $4,000 to $8,000. Costs include extending the gas main to the home (if within 100 feet of existing service, the utility usually subsidises), installing a meter, running internal gas piping, and converting heating and water-heating appliances.
Heat-pump retrofit: $12,000 to $22,000. Includes the heat pump itself ($9,000 to $14,000 for a cold-climate model installed), ductwork upgrades if needed, electrical service upgrade if needed ($1,500 to $3,500), and heat-pump water heater if part of the retrofit.
Operating cost over 20 years
Gas conversion cuts operating cost vs propane or oil by 30 to 45 percent. Typical 20-year operating savings: $14,000 to $22,000.
Heat-pump retrofit cuts operating cost by 50 to 70 percent. Typical 20-year operating savings: $20,000 to $32,000. Heat pump also eliminates indoor combustion (no carbon monoxide risk, no annual furnace inspection, no exhaust venting).
How IRA tax credits change the math
Heat-pump retrofit qualifies for the IRA Energy Efficient Home Improvement Credit: 30 percent of installed cost, capped at $2,000. State Home Energy Rebates programs add another $4,000 to $8,000 in income-qualified states.
Gas conversion has no equivalent federal incentive. Some utilities offer modest conversion rebates ($500 to $1,500). The incentive gap typically tips the 20-year math in favor of heat-pump retrofit.
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Quick answers from the editorial desk
Which costs less upfront — gas conversion or heat pump?
What is the maximum IRA tax credit for a heat pump?
Do heat pumps work in cold climates like Maine or Vermont?
Which is the common path: oil-to-gas or oil-to-heat-pump?
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