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These two, simple four-letter words with opposite meanings "push" and "pull" are often used interchangeably. They produce different results, however, so why would they be confused?

Honeywell commissioned surveys - one of HVAC residential contractors and the other of general contractors and others involved in residential construction projects. The surveys asked about the awareness of the phaseout of virgin R-22 refrigerant, supplies of R-22 in the future, and an understanding of R-410A.

I've watched - with great interest - the new offerings by mass retailers. I'm talking about products that normally wouldn't be stocked by the Home Depots of this world. At the same time, I'm equally interested in consumer reaction to this ever-growing trend.

HFCs And Other Refrigerants On behalf of York International, I would like to clarify York International's position cited in Peter Powell's recent article, "HFCs Are On Shaky Ground In Europe"

September 20-22 Basics of Air Conditioning And Refrigeration National Technology Transfer Detroit 800-933-2820 www.nttinc.com September 20-22 Basics Of Air Conditioning And Refrigeration National Technology Transfer St. Louis 800-933-2820 www.nttinc.com September

Business financial matters are private to many of you. It is one reason why it is difficult for us to round up our annual residential all-star team.

The Certification Circus Comes To Town Mark Skaer's editorial concerning the "certification jungle" ("Clearing Up The Certification Jungle," Aug. 2) absolutely struck a nerve with me. I suggest that the

Readers write in on the topics of certification and contractors hiring HVACR-trained ex-felons.

Wearing shoe or boots coverings while in a customer's home or business might be a bit more bother for techs, but could win the appreciation of customers.

Responsible Refrigerant Decision-Making On behalf of the Alliance for Responsible Atmospheric Policy, I am writing to express strong objection about "HFCs Are On Shaky Ground in Europe" (July 26). We