How wide must my window be to fit the All-Weather 120V heat pump? January 14, 2025 16:07 Updated Windows must be a minimum of 26 inches wide to fit the All-Weather 120V Related articles What is the range of depth of my window sill that the All-Weather 120V heat pump can support? What room size is the All-Weather 120V heat pump designed to cover? What temperatures can the All-Weather 120V heat pump operate in? When can I buy the Gradient?