Important! Rocky Mountain Power's planned changes to the energy efficiency program will become effective September 3, 2018. Changes include streamlining incentive tables to only include measure offerings and maximum incentive levels. Qualifications for energy efficiency measures going forward will be maintained on the wattsmart Homes program website. For questions or additional clarification, please email [email protected].

Heating Seasonal Performance Factor (HSPF)

Heating Seasonal Performance Factor, is an equipment efficiency rating. HSPF is a measure of a heat pump's energy efficiency over one heating season. It represents the total heating output of a heat pump (including supplementary back-up electric heat) during the normal heating season.

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