As record heatwaves boost demand for cooling, air conditioning becomes vital – but with a steep environmental cost.

This is the third and final installment in the systematic air conditioning troubleshooting series. Part 1 dealt with low and high condenser entering air temperatures, an inefficient compressor, and ...

The minimum SEER allowed for a new split system central air conditioner in the U.S. today is 14, which is at least 20 percent more efficient than minimum-efficiency models made even 10 years ago.