Here’s the twist the Martins missed: It’s like judging a winter coat by how well it works in a rainstorm.
The Martin’s 22 SEER unit had a terrible (Heating Seasonal Performance Factor)—only 8.2. It was a cooling machine that could sort-of heat. For Vermont winters, they needed a cold-climate heat pump with an HSPF above 10 and a low-temperature rating. SEER had nothing to do with it. Act III: The Neighbor’s Counter-Story Across the street lived the Chens. They’d installed a heat pump the same week. Their unit was only 18 SEER —four points lower than Mark’s. seer ratings for heat pumps
Here is the SEER tells you, and the story it hides: Here’s the twist the Martins missed: It’s like
The Martins were sold. The install was clean. That August, the house felt like a wine cellar. Their electric bill dropped 30% compared to the window units. Mark posted a smug photo on Facebook: “Go big or go home. 22 SEER. #Winning.” For Vermont winters, they needed a cold-climate heat
Mark asked Mr. Chen, “But isn’t 18 SEER worse than my 22?”
Dave sighed. “Mark, I told you about HSPF. You wanted the big SEER number.”
“SEER is the gold standard,” Dave said, tapping the brochure. “That’s 22 Seasonal Energy Efficiency Ratio. Your old unit was a 14. You’ll save a fortune.”