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2. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   Tankless water heaters provide many advantages: [8] Long term energy savings: Though a tankless water heater typically costs more initially, it usually costs less to operate because of lower energy use—since it only heats water when required instead of continuously maintaining a tank of heated water. Even homes or buildings with high demand ...

3. Water heating - Wikipedia

   en.wikipedia.org/wiki/Water_heating

   A 46 kW (157,000 BTU/h) heater, as might exist in a tankless heater, would take about 15 minutes to do this. At $1 per therm, the cost of the gas would be about 40 cents. In comparison, a typical 230 L (60 US gal) tank electric water heater has a 4.5 kW (15,000 BTU/h) heating element, which at 100% efficient results in a heating time of about 2 ...

4. Cost estimate - Wikipedia

   en.wikipedia.org/wiki/Cost_estimate

   A cost estimate is the approximation of the cost of a program, project, or operation. The cost estimate is the product of the cost estimating process. The cost estimate has a single total value and may have identifiable component values. A problem with a cost overrun can be avoided with a credible, reliable, and accurate cost estimate. A cost ...

5. The IRA Has Made a Little Climate Bang for a Lot of Taxpayer ...

   www.aol.com/news/ira-made-little-climate-bang...

   With federal tax credits covering a third (or more) of the cost of wind and solar installations and $7500 for every EV that automakers sell, the aggregate costs of this approach to bringing down ...

6. Lang factor - Wikipedia

   en.wikipedia.org/wiki/Lang_factor

   It is widely used in industrial engineering to calculate the capital and operating costs of a plant. [1] [2] [3] The factors were introduced by H. J. Lang and Dr Micheal Bird in Chemical Engineering magazine in 1947 as a method for estimating the total installation cost for plants and equipment.

7. Solar water heating - Wikipedia

   en.wikipedia.org/wiki/Solar_water_heating

   Calculators are available for estimating insolation at a site. [ 45 ] [ 46 ] [ 47 ] Below is a table that gives a rough indication of the specifications and energy that could be expected from a solar water heating system involving some 2 m 2 of absorber area of the collector, demonstrating two evacuated tube and three flat plate solar water ...