Bootbox is a high-efficiency window heat pump for multifamily buildings with a sleek, lightweight design. It significantly reduces operating costs, lowers carbon emissions, and improves tenant comfort. The electric-powered, low-GWP window unit weighs just 50 lbs and installs in under 5 minutes, offering an affordable, simple solution to decarbonizing without retrofits, electrical upgrades, or disruptive construction.  It fits in 20" single- and double-hung windows, sliders, and wall sleeves. Bootbox features heating, cooling, dehumidification, IAQ monitoring, air filtration, and outside air intake, making it a simple, all-in-one solution for property managers and their tenants.