Do you own a hot-water heater?

你家有热水器吗？

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HOT WATER HEATER: Similar to refrigerators, consider replacing your water heater if more than 10 years old.

热水加热器（指带有蓄水功能的热水器） ：和对待冰箱的做法一样，换掉使用超过10年的热水器。

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The Solution: If it isn’t a truly essential item (hot water heater or a fridge), then you can wait.

策略：如果不是必需品（热水器，冰箱），那么你能等。

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The authors walk readers through the investment decisions made when the average American house decides to replace a hot-water heater, and why markets are currently structured to discourage buying more efficient heaters.

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Solar thermal heat is ideal as an auxiliary system to existing furnaces and hot water systems -your furnace or water heater operates exactly the same as it always has, coming on and running in response to thermostat settings to keep your house or water heated to the thermostat setting.

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