Q:

Should heat and air window units be sealed?

A:

Quick Answer

Sealing heating and air conditioning window units is recommended to prevent the loss of heated and cooled air through unsealed spaces around the unit. Unsealed air conditioning units, in particular, are a major source of wasted electricity.

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Full Answer

An unsealed heating or air conditioning window unit often allows substantial amounts of heated or cooled air to escape into the environment, reducing the effectiveness of the unit and requiring more energy to replenish the heated or cooled air that escapes. Poorly fitted and sealed air conditioners were estimated to cost residents in New York City between $130 million and $180 million in additional fuel and energy costs a year, as reported in 2011 by the New York Times.

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