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2. Water heating - Wikipedia

   en.wikipedia.org/wiki/Water_heating

   Under the pre-2015 standard, a 75 US gal (280 L; 62 imp gal) gas storage water heater with a nominal input of 22 kW (75,000 BTU/h) or less was able to have an energy factor as low as 53%, while under the 2015 standard, the minimum energy factor for a 75-US-gallon gas storage tank water heater is now 74%, which can only be achieved by using ...

3. Off-Road RVs Exist, and They're Really Freaking Cool

   www.aol.com/off-road-rvs-exist-theyre-230000388.html

   April 20, 2024 at 7:00 PM ... a 4-gallon water heater, and gas-fired furnace. Savage Camper/YouTube. ... 12-volt electric tank heaters, and heated storage areas. Prices start at about $122,318. ...

4. Energy factor - Wikipedia

   en.wikipedia.org/wiki/Energy_factor

   The energy factor metric only applies to residential water heaters, which are currently defined by fuel, type, and input capacity. [5] Generally, the EF number represents the thermal efficiency of the water heater as a percentage, since it is an average of the ratio of the theoretical heat required to raise the temperature of water drawn to the amount of energy actually consumed by the water ...

5. Propane - Wikipedia

   en.wikipedia.org/wiki/Propane

   The density of propane gas at 25 °C (77 °F) is 1.808 kg/m 3, about 1.5× the density of air at the same temperature. The density of liquid propane at 25 °C (77 °F) is 0.493 g/cm 3, which is equivalent to 4.11 pounds per U.S. liquid gallon or 493 g/L. Propane expands at 1.5% per 10 °F. Thus, liquid propane has a density of approximately 4.2 ...

6. TKer: Wall Street strategists nailing one of their more ... - AOL

   www.aol.com/finance/tker-wall-street-strategists...

   Gas prices tick lower. From AAA: "At the pump, the national average for a gallon of gas dropped two cents since last week to $3.06 – matching the January 2024 low. There are now 28 states with ...

7. Hot water storage tank - Wikipedia

   en.wikipedia.org/wiki/Hot_water_storage_tank

   A hot water storage tank (also called a hot water tank, thermal storage tank, hot water thermal storage unit, heat storage tank, hot water cylinder, and geyser) is a water tank used for storing hot water for space heating or domestic use. Water is a convenient heat storage medium because it has a high specific heat capacity. This means ...