The Rezzinâ„¢ ceiling diffuser Model RZ500 is made of high-strength polymer resin. Available in two-way corner, three-way and four-way deflections, the ceiling diffuser has an integral spring-loaded damper that locks in place after adjusting and a removable core that permits easy cleaning or servicing, says the manufacturer. This ceiling diffuser model has a unique interlocking multiple-collar system that connects to standard flexible duct sizes, the company states. The ratcheting clamp system requires no tools when installing the diffuser to drywall or ceiling tiles, saving valuable time, the manufacturer says.

Hart & Cooley Inc., 500 East Eighth St., Holland, MI 49423; 616-392-7855;;

eProduct #197