Gradient’s high-efficiency, 120v window heat pump plugs into a standard socket and is designed for easy installation with residents in place, enabling heating and cooling electrification without drilling, plumbing, electrical upgrades, or major retrofits. The heat pump provides room-by-room temperature control, improving comfort by replacing centralized systems like boilers, with flexible, unitized HVAC. The system delivers efficient performance even in cold climates, helping reduce energy costs and emissions. Gradient’s design uses low-GWP refrigerant sealed at the factory, minimizing leak risk and eliminating the need for field refrigerant connections.

• Electrify building heating and cooling

• Install high-efficiency heating/cooling in building

• Regulate indoor temperature by unit or zone

• Improve tenant control over traditional central systems

• Reduced risk of refrigerant leaks in a building/portfolio

• Low barrier path to building HVAC electrification, no panel upgrades and easy to install

• Minimally-disruptive, quick installation - Gradient's heat pump uses the existing hole in the building's envelope: the window. The mounting bracket requires no drilling or structural modifications. Installation does not require permitting. Built-in atomizers convert condensate into outdoor mist, eliminating plumbing and building alterations. No drainage is needed. Plugs into standard 120v outlet.

• Efficiency in extreme temperatures - The heat pump system delivers efficient performance even in cold climates

• Enhanced air quality - Optional MERV 13 filtration captures fine particulates and enhances indoor air quality.

Gradient's pilot at NYCHA demonstrated up to 60% cost savings when compared to baseline steam radiators. ACEEE has published a report finding that, of the space heating decarbonization options for centrally heated multifamily buildings, window heat pumps generally have the lowest life-cycle capital and energy costs.