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MoreThe WP/AE 9 brazed plate heat exchanger offers 100 tons evaporating and 140 tons condensing capacity. It is compatible with R-22,
-134a, -404A, and other refrigerants. Low refrigerant charge, compact size, and high efficiency make the unit a cost-effective replacement for shell and tube heat exchangers, says the company. Constructed of AISI 316L stainless steel with copper brazing, connection sizes of up to 3 in. are available.
WTT America, Inc., 1630-3 Ocean Ave., Bohemia, NY 11716; 631-218-1900; 631-218-1911 (fax); WTTAmerica@aol.com (e-mail); www.WTTamerica.com (Web site).
This overview of the benefits of zoning includes tips for selling to consumers and businesses. Tom Jackson discusses options for new construction and retrofit, as well as some ways a residential contractor can get into the light commercial business with zoning products. Speaker: Tom Jackson, CEO, Jackson Systems
With access to over one million professionals and more than 60 industry-specific publications, 
