Stillwell-Hansen, Inc.

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Power Quality International, Inc. is a full service company, providing power system solutions to its many consulting, utility, industrial, governmental, institutional, commercial and manufacturing clients.

Count on Stillwell-Hansen to Provide the Best Products for Your Mission Critical Power and HVAC Infrastructure Needs. Whether you need to satisfy the most demanding specifications for mission critical power and business continuity or implement efficient air distribution or energy recovery solutions, you can trust the experts at Stillwell-Hansen. With Liebert Precision Cooling and Power products we offer our customers the premier manufactured solutions to address the needs of any project—delivered on time and on budget.

For over 60 years Acme Engineering & Manufacturing Corporation has grown to become a world leader in the design, manufacture and distribution of fans, blowers and ventilation equipment.

In order to provide a complete offering of duct systems, Lindab also manufactures rectangular ventilation ducts and ventilation components. Many duct systems continue to be made up of rectangular parts and in certain countries these rectangular systems still dominate.

Air Balance, Inc. was founded in Philadelphia in 1958 to manufacture louvers and dampers, with special emphasis on fire dampers. In 1964, Air Balance revolutionized fire dampers by inventing and introducing the curtain blade fire damper, which is still the industry standard. As HVAC systems have become more sophisticated, Air Balance has continued its role as the industry leader in developing state of the art UL classified life safety products including fire, fire/smoke and smoke dampers for both static and dynamic applications.

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