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Carrier CommercialWelcome to Commercial Systems and Services. This site is designed for HVAC professionals like yourselves: engineers, specifiers, building owners, contractors, and facility professionals.

Comparing Energy Efficiency Free On-Line analysis instantly compares the energy efficiency of different brands of heating and cooling equipment utilizing standardized rating systems:AFUE(gas heating)SEER(cooling)HSPF(heat pump heating).

Daikin Applied is a world leader in the manufacture, sales, and service of heating, ventilating, and air conditioning equipment principally for the commercial, industrial, and institutional markets.

Trane CommercialOur goal is to help improve your productivity and competitive edge by helping you get the greatest value from your parts purchase.

York Commercial YORK International is the largest independent supplier of heating, ventilating, air conditioning, and refrigeration (HVAC&R;) equipment in the United States and a leading competitor in the industry internationally.

ahrinet.orgAir Conditioning and Refrigeration Institute

www.ashrae.orgAmerican Society of Heating, Refrigeration & Air Conditioning Engineers

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