Environmental control | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-16

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Heating,_ventilation,_and_air_conditioning


00:02:17 1 Overview
00:03:05 1.1 Individual systems
00:04:06 1.2 District networks
00:05:35 2 History
00:06:45 3 Heating
00:07:25 3.1 Generation
00:08:53 3.2 Distribution
00:09:03 3.2.1 Water/steam
00:10:03 3.2.2 Air
00:10:36 3.3 Dangers
00:12:25 4 Ventilation
00:13:17 4.1 Mechanical or forced ventilation
00:14:45 4.2 Natural ventilation
00:17:08 4.2.1 Airborne diseases
00:17:45 5 Air conditioning
00:19:16 5.1 Refrigeration cycle
00:21:01 5.2 Free cooling
00:23:07 5.3 Packaged vs. split system
00:25:55 5.4 Dehumidification
00:27:05 5.5 Maintenance
00:28:48 6 Energy efficiency
00:29:39 6.1 Heating energy
00:31:19 6.2 Ground source heat pump
00:34:04 6.3 Ventilation energy recovery
00:34:36 6.4 Air conditioning energy
00:36:36 6.5 Demand controlled kitchen ventilation
00:37:38 7 Air filtration and cleaning
00:38:11 7.1 Clean air delivery rate and filter performance
00:39:10 8 HVAC industry and standards
00:40:25 8.1 International
00:41:57 8.2 North America
00:42:07 8.2.1 United States
00:45:50 8.3 Europe
00:45:59 8.3.1 United Kingdom
00:49:09 8.4 Australia
00:49:39 8.5 Asia
00:50:14 8.5.1 Philippines
00:50:47 8.5.2 India



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SUMMARY
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Heating, ventilation, and air conditioning (HVAC) is the technology of indoor and vehicular environmental comfort. Its goal is to provide thermal comfort and acceptable indoor air quality. HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics and heat transfer. "Refrigeration" is sometimes added to the field's abbreviation, as HVAC&R or HVACR or "ventilation" is dropped, as in HACR (as in the designation of HACR-rated circuit breakers).
HVAC is an important part of residential structures such as single family homes, apartment buildings, hotels and senior living facilities, medium to large industrial and office buildings such as skyscrapers and hospitals, vehicles such as cars, trains, airplanes, ships and submarines, and in marine environments, where safe and healthy building conditions are regulated with respect to temperature and humidity, using fresh air from outdoors.
Ventilating or ventilation (the V in HVAC)  is the process of exchanging or replacing air in any space to provide high indoor air quality which involves temperature control, oxygen replenishment, and removal of moisture, odors, smoke, heat, dust, airborne bacteria, carbon dioxide, and other gases. Ventilation removes unpleasant smells and excessive moisture, introduces outside air, keeps interior building air circulating, and prevents stagnation of the interior air.
Ventilation includes both the exchange of air to the outside as well as circulation of air within the building. It is one of the most important factors for maintaining acceptable indoor air quality in buildings. Methods for ventilating a building may be divided into mechanical/forced and natural types.