Heat Pump + Furnace - Extends propane usage between 19-38% at 35°F outdoor temperatures. In heat pump mode the RV's A/C is working in reverse. Heat from the outside is utilized to supplement the furnaceAuto Changeover Heat Pump - When outdoor temperatures drop below 25°F, heat mode automatically engages auxiliary heating sources, e.g., an RV furnace (if the RV is so quipped) to provide optimal comfortDurable by design includes corrosion-resistant coatings, heavy-duty motor support brackets, reinforced screw holes and extensive vibration control testingEasy installation - "EZ InStall" control box - Design allows the controls to be mounted to the ceiling creating hands free installation of electrical connectionsQuiet operation - High-performance motor with sound dampening rubber-grommets reduce noise and vibration throughout the coach"Cool" aerodynamic appearance - High grade, ultra-resistant UV coating and automotive grade polymer shroud with a glossy, attractive appearance complementing the overall exterior of the RVEasy to ready back lit LCD "communicates" giving diagnostic feedbackExpanded polyproylene for easy cleaning and maintenance of indoor coilGE Appliances provides warranty coverage for 2 years on products and partsDimensions: 11" H x 30" W x 40"