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

   www.aol.com/10-signs-heater-isn-t-200000044.html

   Ultimately, the older a heater gets, the less efficient it will become, so if the heater is 15 to 25 years of age, it may be time to start saving for an upgrade. 5. Clogged Air Filter

3. Radiator reflector - Wikipedia

   en.wikipedia.org/wiki/Radiator_reflector

   Radiator reflector panels being installed behind a domestic radiator. A radiator reflector is a thin sheet or foil applied to the wall behind, and closely spaced from, a domestic heating radiator. The intention is to reduce heat losses into the wall by reflecting radiant heat away from the wall.

4. Spacecraft thermal control - Wikipedia

   en.wikipedia.org/wiki/Spacecraft_thermal_control

   The thermal control subsystem can be composed of both passive and active items and works in two ways: Protects the equipment from overheating, either by thermal insulation from external heat fluxes (such as the Sun or the planetary infrared and albedo flux), or by proper heat removal from internal sources (such as the heat emitted by the internal electronic equipment).

5. Heater core - Wikipedia

   en.wikipedia.org/wiki/Heater_core

   Because the heater core cools the heated coolant from the engine by transferring its heat to the cabin air, it can also act as an auxiliary radiator for the engine. If the radiator is working improperly, the operator may turn the heat on (together with the cabin blower fan placed on full speed, and with the windows opened) in the passenger ...

6. Thermoelectric cooling - Wikipedia

   en.wikipedia.org/wiki/Thermoelectric_cooling

   Thermoelectric cooling uses the Peltier effect to create a heat flux at the junction of two different types of materials. A Peltier cooler, heater, or thermoelectric heat pump is a solid-state active heat pump which transfers heat from one side of the device to the other, with consumption of electrical energy, depending on the direction of the current.

7. Radiator - Wikipedia

   en.wikipedia.org/wiki/Radiator

   The Roman hypocaust is an early example of a type of radiator for building space heating. Franz San Galli, a Prussian-born Russian businessman living in St. Petersburg, is credited with inventing the heating radiator around 1855, [1] [2] having received a radiator patent in 1857, [3] but American Joseph Nason and Scot Rory Gregor developed a primitive radiator in 1841 [4] and received a number ...