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2. Storage water heater - Wikipedia

   en.wikipedia.org/wiki/Storage_water_heater

   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 ...

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. 3 Things You Aren't Buying at Costco But Should Be - AOL

   www.aol.com/3-things-arent-buying-costco...

   In fact, some of the best savings the warehouse club provides can be found on products you might never think to purchase there. Just check out these three items from Costco that you're probably ...

6. How much should a house down payment be? - AOL

   www.aol.com/finance/much-house-down-payment...

   0%. It's important to note that the 3% minimum down payment for conventional loans is mainly for first-time homebuyers. If you've owned a home in the past three years, the minimum is generally 5% ...

7. Psst...Amazon has a secret coupon page - AOL

   www.aol.com/lifestyle/amazon-secret-coupons...

   Super-savvy old-school coupon clippers can make an art form out of saving money. And though you may think online shopping doesn't quite allow for the same form of self-expression, you'd be wrong.