Qualified Remodeler Magazine

JUL 2018

Qualified Remodeler helps independent remodeling firms to survive, become more professional and more profitable by providing must-have business information, namely best business practices, new product information and timely design ideas.

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Page 53 of 67

WHAT THEY ENTAIL e installation of a tankless water heater works better in new construction, where the contractor can plan for its gas or electrical consumption. A unit typically uses between 120,000 and 199,000 BTUs of natural gas or propane an hour when heating water, Smith notes. While tankless heaters need up to five times more gas at one time than a tank, they use less gas to heat the same amount. "In many residential applications, a con- tractor would need to upsize the pipe be - tween the [gas] main and the water heater to ensure sufficient supply," Smith explains. "For retrofits involving electric tankless water heaters, a contractor would likely have to install a larger breaker panel with a new elec- trical service to the home. While a standard 50-gallon electric tank-type water heater can run off a 30-amp circuit, a whole-home rate of 11 gallons per minute and a Uniform Energy Factor (UEF) up to 0.94, he adds. Rheem offers a 12-year warranty on all its tankless heat exchangers, although routine service and maintenance can increase the lon- gevity of units, Maxwell explains. e man- ufacturer's AllClear scale-prevention device, when installed with a tankless water heater, distorts the molecular makeup of mineral de- posits—keeping scale buildup from sticking to the inside of heat exchangers. A.O. Smith recently introduced the Product Preservers Anti-Scale System for its tankless water heaters. is process utilizes a non-chemical, non-salt mechanism that prompts the mineral content in water (often calcium and magnesium) to bind together, forming inactive crystals that will not stick to the heat exchanger, and limiting maintenance to a filter change every two years. "Tankless water heaters are generally more sensitive to water chemistry, specifically hard water conditions," Smith says. "Hard water scale can form in the heat exchanger, reducing efficiency and eventually causing a leak." A home water-softener system can help lessen hardness as well, he adds. "Contractors appreciate products that can fulfill multiple roles in a home's hot water system," notes Arthur Smith, product man- ager, specialty residential for A.O. Smith Water Products. Last year the company rolled out its ProLine X E 540P Tankless Water Heater with Recirculation Pump, the most recent addition to its condensing tankless portfolio, for homes with a dedi- cated return line. If the residence does not already have a dedicated return line, the installation of a crossover or bypass valve at the fixture farthest from the unit can usually suffice. Once in place, the valve temporarily uses the cold-water line to recirculate cooled water back to the tankless heater. Because the pump regulates water flow in the pipe instead of a faucet or showerhead, it delivers the hot water faster. "Tankless units with a built-in recircula- tion pump help the average household save up to 12,000 thousand gallons of water per year," says Phillip Maxwell, product manag- er, tankless for Rheem. e company's High Efficiency Tankless Gas Water Heater with Built-in Recirculation boasts a maximum STIEBEL ELTRON's MegaBoost can install on either the inlet or outlet side of any hot water tank, gas or electric, to provide greater amounts of water than the tank can produce by itself, reducing recovery time. Circle 7 on inquiry card NORITZ's EZ Series of tankless water heaters features top-mount water connections, an ability to utilize the existing B-vent, and the possibility of a ½-inch gas line to simplify the installation process for remodelers. Circle 6 on inquiry card 54 July 2018 QR QualifiedRemodeler.com PRODUCT TRENDS: Tankless Water Heaters

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