QME uses a unique cal-rod resistance type heat coil which does not glow "red-hot" as do other types of common heat resistance coils. Danger from overheating or fires is virtually non-existent and the coil is safe to use in wet or humid conditions. Unlike reverse cycle heat systems, heat does not depend upon water circulation. Thus, the life of the compressor, coil, and pump are prolonged. Boats can be winterized and still obtain 100% efficiency even when the water temperature falls below 45? F.

A/C units under 17,000 BTU utilize the quieter, more efficient, and lighter rotary compressors. These compressors have proved to be more durable with less moving parts than the piston type compressors. At the customer's request, however, QME also manufactures units using piston compressors with reverse cycle heat in the smaller units.

QME has developed a unique ducting system which makes installation faster, easier and more economical by using one plenum to supply up to four different ducts to be located in various places throughout the boat. Standard installation kits include 2 supply ducts for systems up to 9,000 BTU's, 3 supply ducts for systems between 12,000 and 17,000 BTU's and 4-5 supply ducts for units 20,000 to 36,000 BTU's.