In forced-air heating and cooling systems, ducts carry hot or cold air to different parts of home.

在强制热风和冷风系统中，通风管道将热空气的冷空气输送到家里不同的地方。

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Ground source heat pumps are recognized as one of the most efficient heating and cooling systems on the market.

地源热泵是公认的最有效的加热和冷却系统的一个市场上。

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The building also has mechanical and electrical systems, such as elevators, heating and cooling systems, and lighting systems.

在建筑物内部还有机械和电气系统，例如电梯、供暖和冷却系统、照明系统等。

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These will include more modern air cooling and heating systems.

VOA: special.2009.05.22

We know how to improve the efficiency of your existing heating and cooling systems.

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Instead, in Howard Beach, floors were ruined, heating and cooling systems wrecked and walls overtaken by mold.

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Mulpuri says the premium his company will charge for the glass should be offset by the savings in heating and cooling systems.

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