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2. 10 Signs Your Heater Isn’t Working as Well as It Could (and ...

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   This increased cost could be the result of a clogged air filter or clogged vent, which would force the heater to work harder to heat the home. If this is the case, replace the filter and clean the ...

3. Do I need to worry about space heaters? Here’s what experts ...

   www.aol.com/lifestyle/worry-space-heaters...

   If your space heater is five or more years old, it's a good idea to check to make sure it has modern safety features like automatic shut-off if the device is tipped over or overheats, Lambert says ...

4. Thermal cutoff - Wikipedia

   en.wikipedia.org/wiki/Thermal_cutoff

   Another type of thermal switch is a PTC (Positive Temperature Coefficient) thermistor; these thermistors have a "cutting off" temperature at which the resistance suddenly rises rapidly, limiting the current through the circuit. When used in conjunction with a thermistor relay, the PTC will switch off an electrical system at a desired temperature.

5. Pilot light - Wikipedia

   en.wikipedia.org/wiki/Pilot_light

   In natural gas furnaces, water heaters, and room heating systems, a safety cut-off switch is normally included so that the gas supply to the pilot and heating system is shut off by an electrically operated valve if the pilot light goes out. This cut-off switch usually detects the pilot light in one of several ways: A flame rectification device. [2]

6. Flameless ration heater - Wikipedia

   en.wikipedia.org/wiki/Flameless_ration_heater

   When water is added to a ration heater, it dissolves the salt to form a salt-water electrolyte, thereby turning each particle of magnesium and iron into a tiny battery. Because the magnesium and iron particles are in contact, they essentially become thousands of tiny short-circuited batteries which quickly burn out, producing heat in a process ...

7. Own a pool in Southern California? New air-quality rule ...

   www.aol.com/news/own-pool-southern-california...

   The South Coast Air Quality Management District's governing board voted 9-1 to effectively phase out certain kinds of natural-gas-fired water-heating equipment in homes and businesses across its ...