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sensible heat pump

the world's first compact, low-carbon window heat pump (formerly bootbox)

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high-efficiency + low-carbon

sensible delivers ENERGY STAR–level efficiency without using high–global warming potential (high-GWP) refrigerants. our heat pump electrifies space heating, cooling, dehumidification, and air filtration in a low-carbon way.

beautifully designed to fit most windows

sensible features a slim, modern design that maximizes natural light and preserves your view instead of blocking it. it can fit in single-hung, double-hung, or slider windows. with clean lines and premium finishes, it looks more like a beautiful piece of furniture than a bulky appliance.

installs in fewer than 5 minutes

sensible weighs less than 50 lb, much lighter than other window heat pumps that can exceed 120 lb. that means it can be shipped to your doorstep and it's easy for one person to install without professional help.

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Concept Rendering

our mission is to electrify the HVAC industry. we’re starting with sensible, the world’s first compact, low-carbon heat pump. 

who we are

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