This brand is a part of UNITED TECHNOLOGIES CORP and is only sold through their authorized dealer network. The COMFORT SERIES 38MFQ models are premium heat pumps with a 15 SEER efficiency and they are available in 115 volt or 208/230 volt models for flexibility in installation. They are backed by a very good guarantee and are budget friendly.
The 38GRQ models (part of their INFINITY SERIES) offer efficiencies as high as 30 SEER and are for single zones while the 38GJQ models can serve multiple zones of the home. They can serve up to nine independent zones from a single outdoor unit and have a 22 SEER energy efficiency.
These heat pumps are sold online through HOME DEPOT, LOWES, and other places. They are basic 13 seer units and are made for the DIY market with quick connect refrigerant lines and wiring. The warranty is not very good when compared to other brands.
This brand is from Heat Controller Inc. which is a part of MARS. The D SERIES offers basic 15 SEER air conditioners and heat pumps. They have random swing louvers which give the effect of a gentle breeze and temperature compensation which takes into account the difference in temperatures from floor to ceiling in a room. They are competitively priced but the guarantee on the units is not very good when compared to other brands. The VMH models are premium heat pump units with a "follow me" temperature sensing remote and a low ambient kit for cooling operation down to 5F.
The InverterFlex models are multisplit units that can serve up to four indoor air handlers but the warranty is not as good as other brands. The VMH ULTRA V SERIES units are designed to provide heating as well as cooling in areas where the outdoor temperature gets as low as oF. The units are available in the USA but only through their dealer network.
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