What Does It Actually Cost to Heat Your Home?
Real fuel prices for Greater Portland, updated weekly from the Maine Governor's Energy Office. Enter your current heating setup to see how every system compares.
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You've seen what these upgrades look like for an average Greater Portland home. The next step is for us to come look at your house — measure the actual walls, the actual heating system, the actual ductwork — and turn the estimate into a specific number.
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About This Data
Fuel prices come from the Maine Governor's Energy Office weekly survey of fuel dealers across the state. We use prices for the Southeast / Greater Portland region.
The calculator adjusts efficiency based on your system type and age. For example, an ancient oil boiler runs at roughly 70% AFUE, while a newer one might hit 87%. Upgrade options use manufacturer-rated efficiencies: ductless heat pumps at COP 2.7, ducted at COP 2.3, and condensing boilers at 95% AFUE.
These represent typical installed performance, not lab ratings. Your actual efficiency depends on equipment condition and sizing.
What This Tool Doesn't Show
- Exact equipment cost. Installation costs vary by home. The insulation and rebate sections in Part 2 give rough estimates, but a free energy assessment gives you exact numbers.
- Your specific insulation levels. Part 2 estimates savings from insulation upgrades assuming minimal existing insulation. Your actual savings depend on current conditions.
- Maintenance costs. Oil and propane systems require annual servicing. Heat pumps need filter cleaning and periodic professional maintenance.
- The value of cooling. Heat pumps provide air conditioning. If you currently run window AC units, that cost isn't captured here.