Runtime hours, not years in North Charleston
冷氣度日 1373、一年約 25 天超過 32°C——運轉時數中等，壽命接近全國平均.
冷氣度日 1373、一年約 25 天超過 32°C——運轉時數中等，壽命接近全國平均
North Charleston runs about 1373 cooling degree days a year, which is a direct proxy for how many hours the compressor will actually turn - and compressors wear out by running hours, not by calendar years.
Why this changes what you should buy
In a dry climate the machine is doing almost pure sensible cooling, so the limiting factors move outdoors: how hot the condenser gets, how much dust is packed into its fins, and how many hours a year it runs. Those are maintenance and placement questions more than equipment questions.
Average relative humidity around North Charleston sits near 77 percent, which decides whether the machine's job is mostly cooling or mostly pulling water out of the air.
What to ask for, in order
- A Manual J load calculation, not a square-footage rule of thumb
- Shade or at least afternoon relief for the outdoor unit, without blocking airflow
- A maintenance interval that includes washing the condenser coil, which fills fast here
- Duct inspection before sizing, because attic ducts in this climate leak into very hot air
North Charleston gets roughly 25 days a year above 32 Celsius, and those are the days a system that is even slightly undersized will never catch up.
Prices in nearby cities
Spartanburg · Savannah · Augusta · Wilmington · Athens · Macon · Cary · High Point · Durham · Sandy Springs · South Fulton · Ocala