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2. Passive cooling - Wikipedia

   en.wikipedia.org/wiki/Passive_cooling

   Passive cooling covers all natural processes and techniques of heat dissipation and modulation without the use of energy. [1] Some authors consider that minor and simple mechanical systems (e.g. pumps and economizers) can be integrated in passive cooling techniques, as long they are used to enhance the effectiveness of the natural cooling process. [7]

3. Slave quarters in the United States - Wikipedia

   en.wikipedia.org/wiki/Slave_quarters_in_the...

   Dogtrot houses or open-passage houses had a breezeway between the two living spaces. [11] Cabins with one room and a loft above were known as one up and one down. [12] A former slave cabin near Eufaula, Barbour County, Alabama, still in use as a residence and photographed c. 1936 for the Slave Narratives project of the Works Progress Administration

4. Thermostatic radiator valve - Wikipedia

   en.wikipedia.org/wiki/Thermostatic_radiator_valve

   A thermostatic radiator valve on position 2 (15–17 °C) Installed thermostatic radiator valve with the adjustment wheel removed A thermostatic radiator valve (TRV) is a self-regulating valve fitted to hot water heating system radiator, to control the temperature of a room by changing the flow of hot water to the radiator.

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6. Micro-environments and radiator hacks: Tips for staying warm ...

   www.aol.com/micro-environments-radiator-hacks...

   This can be done by opening the radiator valve (on a cold radiator) until a hissing sound can be heard. Once water starts to flow from the valve, all the air has escaped and it can be closed.

7. Automatic bleeding valve - Wikipedia

   en.wikipedia.org/wiki/Automatic_bleeding_valve

   A working system should not generate further trapped gas. Air may be drawn in if there is a small leak, or dissolved air in make-up water may come out of solution, but this generally indicates a system leak if new water is needing to be added. The most likely cause of continual gas bleeding is hydrogen, rather than air. [2]

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9. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   In a steam heating system, each room is equipped with a radiator which is connected to a source of low-pressure steam (a boiler). Steam entering the radiator condenses and gives up its latent heat, returning to liquid water. The radiator in turn heats the air of the room, and provides some direct radiant heat. The condensate water returns to ...