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MOVING toward

Old House Journal

|

November - December 2021

Changing energy markets and evolving technology make it possible to heat, cool, and ventilate homes of any age with (mostly) clean, all-electric power—and less of it. Heating home water, formerly an energy hog, is turning into an energy sipper, too.

- MARY ELLEN POLSON

MOVING toward

A self-described early adopter,

Kendall Christiansen previously had helped lead a movement to permit solar panels on the roofs in his historic Brooklyn row-house neighborhood. As his 35-year-old hot-water boiler neared the end of its life, it was a natural decision to convert to a more efficient heating and cooling system—one that was as close to fossil-free as possible.

Christiansen and his wife, Carol Shuchman, chose to replace the old hot-water boiler with a whole-house, air-source heat pump system. Commonly referred to as mini-splits and more accurately as inverter systems, air-source (or air-to-air) heat pumps run solely on electricity. Typically operating at lower temperatures than traditional forced-air or hot-water systems, they can be three to four times as efficient. Some work in temperatures as low as -20°F, too.

“They call them cold-climate heat pumps,” says Matt Crowley, the crew chief for Green Team Long Island, the installer for Christiansen’s 1910 limestone row house. He has seen a flood of residential and commercial customers moving to the all-electric heat pumps. “Basically, we try to get people off fossil fuels.”

THE PRO TIP

A 2018 study in California found that air-source heat pumps could reduce household greenhouse-gas emissions from heating by as much as 54 percent. So besides homeowner savings on fuel costs, the environment also benefits.

Once, we heated our homes with coal.

Old House Journal

このストーリーは、Old House Journal の November - December 2021 版からのものです。

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