The Tempstar® PDX4 dual-fuel unit couples a heat pump with gas heating in one package. It achieves energy-efficiency ratings of 14.5 SEER, up to 8 HSPF, and 78 percent AFUE. The units monitor outdoor ...
The phrase “out of sight, out of mind” may as cliché as the day is long, but when HVAC contractors were asked to share their maintenance tips for rooftop units, the overused expression popped up again ...
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