Why Altitude Derating Matters at Tahoe
AC equipment is tested and rated at sea level. At 6,200 feet, the air is less dense. Both the compressor and the coolant cycle move less heat per unit of energy. A 3-ton unit sized for Sacramento may only deliver 2.3 to 2.5 effective tons at Tahoe's elevation.
Fresh Air applies altitude derating to every South Lake Tahoe estimate. We pick a unit size that delivers rated cooling at your elevation, not at sea level. This is a detail many valley contractors miss when they take on Tahoe jobs. It is a detail Fresh Air does not miss.