A.O. Smith Water Products Co. has expanded its line of 94 percent efficient Cyclone XHER commercial gas water heaters, adding 300,000, 400,000 and 500,000 Btu models, each with larger 130-gallon tanks. By manifolding up to three Cyclones together, total storage of 390 gallons and total input of 1.5 million Btu can be achieved.

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