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2. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   A hybrid water heater is a water heating system that integrates technology traits from both the tank-type water heaters and the tankless water heaters. [6] It maintains water pressure and consistent supply of hot water across multiple hot water applications, and like its tankless cousins, it is efficient and can supply a continuous flow of hot ...

3. Water heating - Wikipedia

   en.wikipedia.org/wiki/Water_heating

   However, legionella can be safely and easily controlled with good design and engineering protocols. For instance raising the temperature of water heaters once a day or even once every few days to 55 °C (131 °F) at the coldest part of the water heater for 30 minutes effectively controls legionella.

4. Edwin Ruud - Wikipedia

   en.wikipedia.org/wiki/Edwin_Ruud

   Ruud was issued his patent for the coiled tube Automatic Water Heater on September 6, 1898. [17] A 1915 diagram showing the innards of a Ruud instantaneous water heater. Ruud's business expanded as he popularized and improved on his instant water heater design. In 1908, Ruud Manufacturing acquired two local heating and plumbing firms.

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6. Solar water heating - Wikipedia

   en.wikipedia.org/wiki/Solar_water_heating

   The tested SWH system had about 20% of the impact of an electrical water heater and half that of a gas water heater. [ 51 ] Analysing their lower impact retrofit freeze-tolerant solar water heating system, Allen et al. (qv) reported a production CO 2 impact of 337 kg, which is around half the environmental impact reported in the Ardente et al ...

7. WELS rating - Wikipedia

   en.wikipedia.org/wiki/WELS_rating

   The WELS water rating label. There are three parts to the label: The star rating at the top shows the water efficiency of the product. The more stars, the more water efficient. The water consumption rate in the middle shows the amount of water used. The company name and the WELS license number are at the bottom.