The IPVB-ECO is an economizer system for commercial boiler and water heater systems. The unique design consists of an inline power venter with an integrated economizer unit with stainless steel tubes in a compact design, says the company. The system can operate in a condensing or non-condensing mode. Features include: seven standard sizes; energy savings up to 5 percent; variable speed and direct drive; and natural gas, LP gas and oil.

ENERVEX, 1200 Northmeadow Parkway, Suite 180, Roswell, GA 30076; 800-255-2923; 770-587-4731 (fax);;