The Pro Tanklessâ„¢ by Bosch gas water heaters are designed to be energy efficient and environmentally friendly, says the company. The GWH 635 ES Model is capable of producing more than 6 gallons of hot water per minute, the company states. Features include a solid copper heat exchanger, electronic ignition, and external temperature controls. It has a 175,000-Btu input and an 87-percent average efficiency rating. It is rated at 6.35 gallons per minute. The product line is backed by a 15-year warranty. The Pro Tankless is available in either natural gas or liquid propane configurations.

Controlled Energy Corp., 340 Mad River Park, Waitsfield, VT 05673; 800-495-1782; www.protankless.com.

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