Seasonal Energy Efficiency Ratio [verified] -

That winter, when the heat pump reversed cycle to warm her home, she whispered a thank-you to Marco and to the engineers who chased every fraction of a ratio. She had learned that efficiency wasn’t about deprivation. It was about getting exactly what you needed, with nothing left to burn.

The first electric bill arrived. She opened it with the trepidation of someone reading a medical diagnosis. Her eyes scanned to the bottom line. seasonal energy efficiency ratio

Marco knelt and brushed a decade of dust from the data plate. “Can’t. They don’t make parts for this anymore. You need a new system.” He tapped the plate. “See this number? 6.8. That’s your SEER rating. This old beast has a Seasonal Energy Efficiency Ratio of 6.8. For every watt of electricity it eats, it produces 6.8 BTUs of cooling.” That winter, when the heat pump reversed cycle