The BTH-400 Model is the newest addition to the Cyclone XHE® line of commercial gas water heaters. It has the delivery capacity of a 130-gallon tank and has a 400,000-Btu input. According to the manufacturer, it achieves 99 percent thermal efficiency with a new cyclonic combustion system that distributes heat more evenly and a heat exchanger coil with more heat transfer surface area. The BTH-400 provides 475-gph recovery at 100 degree F rise, 20 percent higher recovery than standard commercial gas water heaters with comparable input, the manufacturer claims.

A.O. Smith Water Products Co., 500 Lindahl Pkwy., Ashland City, TN 37015; 615-792-4371; (website).

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