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  2. Victorian Railways power vans - Wikipedia

    en.wikipedia.org/wiki/Victorian_Railways_power_vans

    From 1961 to 1963, a single van was fitted with a generator set to provide power to passenger trains running between Melbourne and Albury on the new standard gauge route. The van was numbered BP98 and painted in blue with gold stripes to match the carriages. A video of the vehicle in service is available online, timestamp 2:31 to 2:44 -

  3. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...

  4. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    Heating, ventilation, and air conditioning (HVAC) is the use of various technologies to control the temperature, humidity, and purity of the air in an enclosed space. Its goal is to provide thermal comfort and acceptable indoor air quality .

  5. VicRail N type carriage - Wikipedia

    en.wikipedia.org/wiki/VicRail_N_type_carriage

    Two-stage air-conditioning was fitted for summer, and heating elements placed underneath the carpet for winter. Those systems, along with those for lighting and announcements, were powered by three-phase alternators, fixed to the underframe of each carriage.

  6. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    A thermostat is a system that monitors and regulates a heating or cooling system. It can be used to set the desired temperature at which it keeps the environment either heated or cooled. two-stage (cooling and heating) A two-stage air conditioner is designed to operate on high and low settings during different weather conditions and seasons.

  7. Heat recovery ventilation - Wikipedia

    en.wikipedia.org/wiki/Heat_recovery_ventilation

    Ventilation unit with heat pump & ground heat exchanger - cooling. Heat recovery ventilation (HRV), also known as mechanical ventilation heat recovery (MVHR) is a ventilation system that recovers energy by operating between two air sources at different temperatures. It is used to reduce the heating and cooling demands of buildings.

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