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Domestic Hot Water

  • Q&A: Noisy Expansion Tank

    Q: Even though I followed the manufacturer's specifications when I installed the 2-gallon thermal expansion tank and check valve for my customers' domestic hot-water system, they still complain of "clicking" noises, mainly during the heating season. Does

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    Proper Water-Heater Temperature

    Q: I recently learned that building codes in my state now require that newly installed water heaters be set at 140°F. But up until now, with concerns about energy conservation and scalding safety, 120°F was the normal setting. Why the change?

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    Kitchen & Bath

    RO water filtration; laundry rooms; showers

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    Rebuilding the Gulf: Cooling Strategies for the Gulf Coast

    In the hot, humid South, it's not enough to install high-efficiency air conditioning. Dedicated dehumidification, along with impeccable attention to sealing the building enclosure, is required. Researchers at LSU exhibit three practical systems that balance performance and cost in the "LaHouse"...

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    Pneumatic fasteners; skylights; instantaneous water heaters

  • Protecting Water Heaters With Expansion Tanks

    Q. We recently had to replace our relatively new gas-fired water heater when its internal flue tube collapsed, ruining the thermostat and causing hot combustion gases to spew out the front. The installer, who claimed that the water heater was ruined by thermal expansion, added a thermal-expansion...

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    Installing On-Demand Water Heaters

    Compact tankless water heaters free up valuable space and save energy, but sizing and installation require a unique approach.

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    Using PEX in solar water heating; solar hot-water storage; hot-water recirculation; leak testing

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    Solar Hot Water 101

    Solar water heating has a proven record of cutting energy costs. Here's what you need to know to help customers choose the right system.

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    Who Says There's No Free Lunch?

    Homemade biodiesel