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2. Rheem Manufacturing Company - Wikipedia

   en.wikipedia.org/wiki/Rheem_Manufacturing_Company

   Rheem Manufacturing Company is a privately held manufacturer who produces residential and commercial water heaters, boilers, heating, ventilating and air conditioning (HVAC) equipment. The company also produces and sells products under the Ruud brand name.

3. Propane, butane, and LPG container valve connections

   en.wikipedia.org/wiki/Propane,_butane,_and_LPG...

   Several types of valve connections for propane, butane, and LPG containers exist for transport and storage, sometimes with overlapping usage and applications, and there are major differences in usage between different countries. Even within a single country more than one type can be in use for a specific application.

4. Thermal expansion valve - Wikipedia

   en.wikipedia.org/wiki/Thermal_expansion_valve

   A thermal expansion valve is a key element to a heat pump; this is the cycle that makes air conditioning, or air cooling, possible.A basic refrigeration cycle consists of four major elements: a compressor, a condenser, a metering device and an evaporator.

5. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   Tankless gas electronic ignition water heaters. 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.

6. List of recreational vehicle manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_recreational...

   Caravan (travel trailer) Static caravan 5th wheel Popup / hybrid Other Notes; AEONrv. Reno, Nevada, United States. X. Adria Mobil. Novo Mesto, City Municipality of ...

7. Bang–bang control - Wikipedia

   en.wikipedia.org/wiki/Bang–bang_control

   A water heater that maintains desired temperature by turning the applied power on and off (as opposed to continuously varying electrical voltage or current) based on temperature feedback is an example application of bang–bang control. Although the applied power switches from one discrete state to another, the water temperature will remain ...