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2. Aquastat - Wikipedia

   en.wikipedia.org/wiki/Aquastat

   The boiler will also fire (regardless of thermostat state) when the boiler water temperature goes below a range around the low limit, ensuring that the boiler water temperature remains above a certain point. The low limit is intended for tankless domestic hot water; it ensures that boiler water is always warm enough to heat the domestic hot water.

3. What should you set your heat to in the winter? Avoid ... - AOL

   www.aol.com/finance/set-heat-winter-avoid...

   They have built-in safety features that turn the heaters off if they tip over, overheat or have been left turned on for too long. How to save on heating bills A Nest smart thermostat in an ...

4. Here's How Often You Should Drain Your Water Heater ... - AOL

   www.aol.com/heres-often-drain-water-heater...

   Step 1: Shut off the cold water supply on the top of the water heater. Step 2: Next, disconnect the power to the water heater or shut off the gas supply. The water inside the tank will be hot, so ...

5. Condensing boiler - Wikipedia

   en.wikipedia.org/wiki/Condensing_boiler

   Condensing boilers are water heaters typically used for heating systems that are fueled by gas or oil. When operated in the correct circumstances, a heating system can achieve high efficiency (greater than 90% on the higher heating value ) by condensing water vapour found in the exhaust gases in a heat exchanger to preheat the circulating water.

6. Hydrostatic test - Wikipedia

   en.wikipedia.org/wiki/Hydrostatic_test

   A hydrostatic test is a way in which pressure vessels such as pipelines, plumbing, gas cylinders, boilers and fuel tanks can be tested for strength and leaks. The test involves filling the vessel or pipe system with a liquid, usually water, which may be dyed to aid in visual leak detection , and pressurization of the vessel to the specified ...

7. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   A hybrid water heater is a water heating system that integrates technology traits from both the tank-type water heaters and the tankless water heaters. [5] It maintains water pressure and consistent supply of hot water across multiple hot water applications, and like its tankless cousins, it is efficient and can supply a continuous flow of hot ...