01
Decision tool / 03
Three HVAC paths. One transparent cost frame.
Compare net installed cost and the present value of annual energy and maintenance over the years you expect to own the home.
About 5 minutes · Lifecycle method v1.0.0Example loaded
Illustrative numbers show the lifecycle comparison. They are not national cost defaults. Replace them with written quotes and your own annual-cost estimates.
Comparison frame
Put every system on the same clock.
Use installed cash prices, confirmed incentives, and annual costs built from your utility rates or contractor estimates.02
Furnace and central AC
03
Dual-fuel system
Keep the scenarios truly comparable
Review system results Include electrical, duct, venting, gas, condensate, controls, removal, permits, and backup-heat work in the installed price when they apply. This version does not model financing, tax effects, future rate changes, equipment replacement, or resale value.