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2. Edwin Ruud - Wikipedia

   en.wikipedia.org/wiki/Edwin_Ruud

   Edwin Ruud. Edwin Ruud (9 June 1854 – 9 December 1932) was a Norwegian-American mechanical engineer and inventor who immigrated to the United States where he designed, sold, and popularized the tankless water heater. He was the founder and President of Ruud Manufacturing Company, now a division of Rheem Manufacturing Company. [ 6 ][ 7 ][ 8 ]

3. Water heating - Wikipedia

   en.wikipedia.org/wiki/Water_heating

   A BTU is the energy required to raise one pound of water by one degree Fahrenheit. A US gallon of water weighs 8.3 pounds (3.8 kg). To raise 230 L (60 US gal) of water from 10 °C (50 °F) to 50 °C (122 °F) at 90% efficiency requires 60 × 8.3 × (122 − 50) × 1.11 = 39,840 BTU. A 46 kW (157,000 BTU/h) heater, as might exist in a tankless ...

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. More than 20 of the best Labor Day deals under $100 you need ...

   www.aol.com/lifestyle/best-labor-day-deals-under...

   September 1, 2024 at 7:46 AM. More than 20 of the best Labor Day deals under $100 you need to know about. Whether you like it or not, Labor Day weekend is the unofficial end of summer. If the ...

6. Average rate on a 30-year mortgage slips to 6.08%, lowest ...

   www.aol.com/average-rate-30-mortgage-slips...

   The average rate on a 30-year mortgage in the U.S. slipped to its lowest level in two years, boosting home shoppers' purchasing power as they navigate a housing market with prices near all-time highs.

7. Wisconsin mayor carts away absentee ballot drop box, says he ...

   www.aol.com/wisconsin-mayor-carts-away-absentee...

   The mayor of a central Wisconsin city who ran for office on his opposition to absentee ballot drop boxes said Wednesday he did nothing wrong when he put on work gloves, donned a hard hat and used ...