Dr-Fix-It! HVAC-R Commercial Package Units. HVAC-R Commercial Package Units. General Information and Sources for Commercial Air Conditioning Package Units. Commercial Systems and Service of Heat Pumps and air conditioning Package Units principally for the commercial, industrial and institutional markets.Package Units are Self-Contained Air Conditioners, Heat Pumps and/or Heaters. All that is Necessary is to Hook Up the Required Utilities and Ductwork.

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

McQuay Commercial McQuay International 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 Commercial Our 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.