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The Sheet Metal and Air Conditioning Contractors' National Association ( SMACNA; pronounced 'Smack'-'Nah') is an international trade association with more than 4,500 contributing contractor members [ 1] in 103 chapters [ 2] throughout the United States, Canada, Australia and Brazil. Its headquarters is in Chantilly, Virginia .
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 ...
Air conditioning can be achieved using a mechanical 'air conditioner' or by other methods, including passive cooling and ventilative cooling. [ 2][ 3] Air conditioning is a member of a family of systems and techniques that provide heating, ventilation, and air conditioning (HVAC). [ 4] Heat pumps are similar in many ways to air conditioners ...
Typically, a tech will blow the drain out with compressed air. But you can use a vacuum to suck it out the other end. Stangoni suggests using a vacuum both preventatively and as a fix after a clog ...
A short-lived air-conditioned service was launched in 2005 after the first Volvo buses. There were 10 buses: five Tata (built by Popular) and five Ashok Leyland, built by Irizar TVS. The Tata buses were built on LPO 1616/62 BS-II chassis with engine-driven (direct-drive) air-conditioning, and the AL chassis were 177 hp 12M BS-II (ALPSV 4/86 ...
Willis Haviland Carrier (November 26, 1876 – October 7, 1950) was an American engineer, best known for inventing modern air conditioning. Carrier invented the first electrical air conditioning unit in 1902. In 1915, he founded Carrier Corporation, a company specializing in the manufacture and distribution of heating, ventilation, and air ...
Variable air volume ( VAV) is a type of heating, ventilating, and/or air-conditioning ( HVAC) system. Unlike constant air volume (CAV) systems, which supply a constant airflow at a variable temperature, VAV systems vary the airflow at a constant or varying temperature. [ 1][ 2] The advantages of VAV systems over constant-volume systems include ...
The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work (energy) required. [ 1][ 2] Higher COPs equate to higher efficiency, lower energy (power) consumption and thus lower operating costs. The COP is used in thermodynamics .