What is the range of depth of my window sill that the All-Weather 120V heat pump can support? January 14, 2025 16:23 Updated Please see this chart which shows the acceptable dimensions for the All-Weather 120V heat pump. Related articles How do I install my All-Weather 120V heat pump? What is the power supply requirement for the All-Weather 120V™ Window Heat Pump? What is the voltage of the All-Weather 120V heat pump? What is the weight of the All-Weather 120V heat pump?