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2. Own a pool in Southern California? New air-quality rule ...

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   The rule will lead to the replacement over three decades of more than 1 million gas-burning appliances — including an estimated 700,000 pool heaters and 300,000 tankless water heaters — with ...

3. Water heating - Wikipedia

   en.wikipedia.org/wiki/Water_heating

   In the United States, typical natural gas water heaters for households without unusual needs are 150–190 L (40–50 US gal) with a burner rated at 10.0–11.7 kilowatts (34,000–40,000 BTU/h). This is a popular arrangement where higher flow rates are required for limited periods.

4. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   Gas water heaters have an exhaust vent or one to two exhaust pipes on the top, and still require electric power for electronics, sensing and ignition. A three-phase, 21 kW, 400-volt tankless water heater in Europe, with new European color coding for three-phase power. There are also heaters that use several single-phase circuits instead.

5. Feedwater heater - Wikipedia

   en.wikipedia.org/wiki/Feedwater_heater

   A feedwater heater is a power plant component used to pre-heat water delivered to a steam generating boiler. [1] [2] [3] Preheating the feedwater reduces the irreversibilities involved in steam generation and therefore improves the thermodynamic efficiency of the system. [4] This reduces plant operating costs and also helps to avoid thermal ...

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   AOL latest headlines, entertainment, sports, articles for business, health and world news.

7. Biden heralds his efforts to strengthen gun laws hours after ...

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   June 11, 2024 at 7:14 PM. Evan Vucci/AP. President Joe Biden on Tuesday heralded the steps his administration has taken to strengthen the country’s gun laws and enhance the penalties for those ...