The new Phoenix® Evolution from Heat Transfer Products melds hydronic space heating and domestic hot water with complete system control in a single, compact, 96-percent-efficient package. One Evolution unit effectively replaces a gas-fired water heater, a 135,000 Btuh boiler, and a buffer tank in a space the size of the average residential water heater, notes the company. The units are entirely pre-plumbed and wired to ease installation.

Heat Transfer Products, Inc., PO Box 429, 120 Braley Road, East Freetown, MA 02717; 800 323 9651 or 508 763 8071; 508 763 3769 (fax);