A Denver-area Reddit post is drawing attention because one homeowner reported a 36% year-over-year drop in summer electricity use. The homeowner said the decrease followed the replacement of a 32-year-old air conditioner and furnace with a heat pump and backup furnace.
For households bracing for high cooling bills, that kind of result offers a concrete way to imagine what a heat pump can do.
What happened?
The figures came from a post on Reddit, where the homeowner compared two billing periods of equal length — 29 days each — covering June 1-30, 2025, and June 2-July 1, 2026.
According to the post, the Denver-area home was built in 1985, is roughly 3,300 square feet, and was kept at 74 degrees Fahrenheit during the summer.
“The only change we made was replacing a 32 year old A/C & furnace with a heat pump & backup furnace in December,” the original poster wrote…