Touted as the first green fan tray on the market, the Gardtec Green Fan Tray assembly sports a design that allows fans to remain in the off position until the system is fully operational and requires cooling. This design is 100% integrated and requires no additional wiring, controllers, or probes. The fan trays are available with 31619 ac fans, both in 115V and 230V versions. A standard fan tray is designed for a 1U configuration. For more details and prices, call Gardtec Inc., Racine, WI. (262) 634-5560.