Important! Rocky Mountain Power’s wattsmart Starter Kit will no longer be available effective August 5, 2016. For questions or additional clarification, please email HES@rockymountainpower.net.

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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