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Heating, ventilation, and air conditioning Wikipedia.
The HVAC industry was historically regulated by the manufacturers of HVAC equipment, but regulating and standards organizations such as HARDI, ASHRAE, SMACNA, ACCA, Uniform Mechanical Code, International Mechanical Code, and AMCA have been established to support the industry and encourage high standards and achievement.
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Parker Davis HVAC International, Inc.
We Offer a Full Range Of America's' Most Efficient Air Conditioners And Heat Pumps. HVAC International Inc. With a track record of over 25 years, Parker Davis HVAC has been successfully making the world a more comfortable place to live, thanks to the powerful technology inside its Pioneer brand equipment.

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