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2. Close Coupled Cooling - Wikipedia

   en.wikipedia.org/wiki/Close_Coupled_Cooling

   Kava also stated, referring to other types of cooling systems with installations on the ceiling to return the hot exhaust air to the air conditioners of the computer room (CRAC) located along the perimeter of the raised floor area, that The whole system is inefficient because the hot air is moved over a long distance while traveling towards the ...

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. Glossary of HVAC terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_HVAC_terms

   The hourly ventilation rate divided by the volume of a space. For perfectly mixed air or laminar flow spaces, this is equal to the number of times per hour that the volume the space is exchanged by mechanical and natural ventilation. Also called air change rate or air exchange rate. Abbreviated ACH or ac/hr. air conditioner

5. Server room - Wikipedia

   en.wikipedia.org/wiki/Server_room

   This type of air conditioning draws air into the front of the air handler unit (AHU), cools the air over the heat exchanger, then distributes the cooled air out through the top or through duct work. This air conditioning configuration is well suited to retro-fitted computer rooms when raised floors are either of inadequate depth or do not exist ...

6. Fan coil unit - Wikipedia

   en.wikipedia.org/wiki/Fan_coil_unit

   A unit ventilator is a fan coil unit that is used mainly in classrooms, hotels, apartments and condominium applications. A unit ventilator can be a wall mounted or ceiling hung cabinet, and is designed to use a fan to blow outside air across a coil, thus conditioning and ventilating the space which it is serving.

7. Air handler - Wikipedia

   en.wikipedia.org/wiki/Air_handler

   An air handler, or air handling unit (often abbreviated to AHU), is a device used to regulate and circulate air as part of a heating, ventilating, and air-conditioning system. [1] An air handler is usually a large metal box containing a blower , furnace or A/C elements, filter racks or chambers, sound attenuators , and dampers . [ 2 ]