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Utilities · Efficiency

Heat Pump Savings

Estimate low/base/high annual savings and payback ranges for heat pump installation.

Last reviewed: February 18, 2026

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What this calculator does

Estimate low/base/high annual savings and payback ranges for heat pump installation.

How it's calculated

  • Inputs are validated before running the calculator-specific compute() function.
  • Core math is deterministic and implemented in src/lib/calculators/heat-pump-savings.ts.
  • Results are recalculated instantly as values change and are shareable via query parameters.
  • Disclosure assumptions and limitations are shown on-page for decision context.

Example

Example scenario: Install cost = 14000 USD; Current annual heating/cooling cost = 2800 USD; Savings low = 15 %; Savings base = 25 %. Sample output: Annual savings (low): $420.00

Common mistakes

  • Using optimistic rates or appreciation assumptions without testing a conservative case.
  • Ignoring taxes, insurance, HOA, or maintenance in monthly cost planning.
  • Treating modeled outputs as guaranteed quotes rather than planning estimates.
  • Not comparing at least two scenarios before making a financing decision.
  • Skipping professional review for legal, tax, underwriting, or insurance details.

FAQs

Why use low/base/high scenarios?
HVAC savings are uncertain, so scenario ranges help avoid overconfidence in one estimate.
Does this include incentives or rebates?
Not directly. Reduce install cost input to reflect expected incentives if you want net-cost modeling.
Can payback be longer than equipment life?
Yes in low-savings scenarios. Use horizon assumptions that match your expected ownership period.
Does this include maintenance differences?
No. Add expected annual maintenance differences separately in your planning.
Is this a utility audit replacement?
No. Use professional load calculations and contractor proposals for final decisions.