She did the math. The 20 SEER unit cost $3,000 more upfront. But between the federal tax credit for high-efficiency systems and the projected monthly savings of $120 from June through September, the payback was just over two years. After that, the savings went straight into her pocket.
She had saved compared to the same month the previous year. seasonal energy efficiency ratio
“And that’s bad?”
That night, as sweat beaded on her upper lip and the portable fan did little more than stir the thick air, Elara opened her laptop. She fell down a rabbit hole of HVAC forums, government energy guides, and manufacturer spec sheets. The ghost in the machine, she realized, was efficiency—or the lack of it. She did the math