Window heat pumps offer efficient heating and cooling for renters

A new generation of window heat pumps is emerging in the U.S., offering a more accessible way for renters and budget-conscious homeowners to adopt efficient heating and cooling technology. Traditionally, upgrading to electric heat pumps, which move heat rather than generate it, required expensive, professionally installed systems costing up to $10,000. These systems, often called mini-splits, typically involve an outdoor condenser and an indoor unit.

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Heating and cooling buildings consumes 35% of all the energy used in the United States each year.

Window heat pumps, however, function similarly to window air conditioners. These self-contained units can be installed by the user without professional help and plug into a standard wall outlet. Crucially, they provide both heating and cooling. With a price point between $3,000 and $4,000, they are considerably cheaper than permanent installations and offer the flexibility of being moved to a new residence.

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Unlike window air conditioners, though, they can provide heat as well as cooling.

Designed by experts who have evaluated various energy efficiency technologies, these window units aim to make significant improvements to home climate control systems more attainable. They use less than half the electricity of traditional electric resistance heating and cooling systems. While federal subsidies for such equipment expired in 2025, some local utilities, states, and governments may still offer financial assistance.

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They cost much less than a permanent system – between $3,000 and $4,000 – and can be moved to a new property if the owner relocates.

Despite their advantages, current models have limitations. Their availability is still limited, and they are not designed to heat or cool very large spaces independently. Furthermore, their efficiency decreases when heating in extremely cold outdoor conditions. Some cheaper models exist but lack efficiency ratings and struggle in low temperatures, often operating more loudly.

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Heat pumps use a reversible refrigeration cycle and can provide similar heating and cooling as electric-powered space heaters, furnaces and baseboard heaters, while using less than half the electricity.