These are part of the M-Series product line, including indoor units, outdoor units, and controller options for residential and light commercial applications.
The following remarks were made regarding the article “Is Raising Heat Pumps Really Necessary?” written by Robin Boyd, HVAC consultant, published May 23, 2011.
This heat pump features Quantum™ Coil Design, which means the coil is made of an all-aluminum alloy for corrosion-resistance that protects the unit from both indoor and outdoor elements, including salt and volatile organic compounds.