A ductless head is cold, dark and moist. Prevention first, then the cleaning practice that actually…

A correctly designed duct system and two uncomfortable rooms years later. Static pressure measurement as the…

Constant fan, cycling thermostats and UV lights all stop dirty sock syndrome, and none of them…

Cut the flare nuts off the line set. Why a ductless refrigerant circuit needs the frost-rated…

Early-season maintenance in cold mornings and R-410A valves that hunt — what to expect long before…

A cut-and-dry procedure for identifying the wrong fixed orifice, and the case for field-installing a TXV…

The old sight-glass adage, and why a clear glass does not tell you the TXV has…

A simple process for confirming non-condensables without burning hours and hundreds of dollars in virgin refrigerant.

Why EER is the more honest number for field energy savings than seasonal SEER, and the…