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2. Edwin Ruud - Wikipedia

   en.wikipedia.org/wiki/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

   Built-in small storage water reservoir as part of heat exchanger (typically between 2 US gallons (7.6 L; 1.7 imp gal) to 20 gallons) Dual activation: flow sensing and thermostat control; Hybrid water heaters can be gas-fired (natural gas or propane), or be electrically powered using a combination of heat pump and conventional electric heating ...

5. This 102-year-old resort owner knows a thing or two about ...

   www.aol.com/finance/102-old-resort-owner-knows...

   It charges guests $5,100 and up per person for weeklong packages and is replete with 20 full-time fitness instructors, 11 gyms, a cooking school, an organic farm, three spa treatment centers ...

6. Storage water heater - Wikipedia

   en.wikipedia.org/wiki/Storage_water_heater

   A storage water heater, or a hot water system ( HWS ), is a domestic water heating appliance that uses a hot water storage tank to maximize water heating capacity and provide instantaneous delivery of hot water. [1] Conventional storage water heaters use a variety of fuels, including natural gas, propane, fuel oil, and electricity.

7. IRS makes free tax return program permanent and is ... - AOL

   www.aol.com/news/irs-makes-free-tax-return...

   The IRS said Thursday it will make permanent the free electronic tax return filing system that it experimented with this year and is asking all 50 states and the District of Columbia to help ...