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Duct leakage test in the US. A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating, ventilating and air-conditioning (HVAC) ductwork. A duct leakage tester consists of a calibrated fan for measuring an air flow rate and a pressure sensing device to measure the pressure created by the fan flow.
In 1996, ARS was founded to consolidate local and regional HVAC service companies. Shortly after, The Servicemaster Company , based in Downers Grove, Illinois , acquired both Rescue Rooter and ARS, in 1998 and 1999 respectively, and brought them together under the "ARS/Service Express" brand.
Lake Travis is located near Hudson Bend Hudson Bend is located 16 miles (26 km) northwest of Austin on Lake Travis . According to the United States Census Bureau , the CDP has a total area of 6.7 square miles (17.3 km 2 ), of which 4.0 square miles (10.3 km 2 ) is land and 2.7 square miles (7.0 km 2 ) (40.27%) is water.
By 1950, the company was a large manufacturer of commercial refrigeration equipment. It entered the relatively new field of air conditioning in 1952 with its first window air conditioning units. The company is credited with several innovations, including introducing the first refrigerated display case for food retailers.
The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER), which is defined by the Air Conditioning, Heating and Refrigeration Institute in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment. [61]
The HVAC industry was historically regulated by the manufacturers of HVAC equipment, but regulating and standards organizations such as HARDI (Heating, Air-conditioning and Refrigeration Distributors International), ASHRAE, SMACNA, ACCA (Air Conditioning Contractors of America), Uniform Mechanical Code, International Mechanical Code, and AMCA ...
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