The hundred-day summer
Cooling season in Alabama is not a season; it is most of the year. From the first sticky week of April to the last warm afternoons of October, the system runs nearly every day — and equipment ages by the hour of runtime, not by the calendar. The same unit that lasts twenty years in a northern climate does an honest career here in far fewer.
- 1 Thermostat — The season’s odometer — a hundred cooling days pass through it.
- 2 Return and filter — The lungs, and the first thing a retrofit house sized too small.
- 3 Air handler and furnace — Up in the attic, asleep nine months, asked for everything in December.
- 4 Coil and condensate drain — Litres of Gulf moisture a day, all leaving through one narrow line.
- 5 Attic ducts — The coldest air in the house, commuting through the hottest room on the property.
- 6 Outdoor unit — Full sun, full load — where August culls capacitors by the thousand.
Hours are the real odometer
A compressor’s life is a budget of starts and running hours, and an Alabama summer spends that budget generously: long afternoons at full load, evenings that barely relent, and a shoulder season on each side that would count as summer anywhere else. Multiply by a hundred-plus cooling days and the arithmetic explains what the trade sees every year — units retiring here at ages that would be considered young in Ohio.
That is not a defect; it is a duty cycle. But it changes how age should be read. A ten-year-old system in Alabama has northern fifteen-year hours on it, and decisions — repair, replace, budget for next year — go better when they are made on hours worked rather than birthdays. A system that limps through August while the bills climb is not having a bad month; it is telling you where it is in its career.
Working with the season, not against it
The calendar has two merciful windows: the mild weeks of early spring and the long gentle fall. Those are the moments for the look-over — coil cleaned, charge verified, drain cleared — because the technician has time, the parts are on the shelf, and whatever gets found is found before the heat arrives to exploit it. The same visit in July happens at the back of a very long line.
And when replacement day comes, the season argues for buying equipment suited to the duty: efficiency ratings matter more here than almost anywhere, because every point of efficiency is multiplied by more running hours than the brochure assumed. The bill difference between two units is a northern rounding error and an Alabama line item.