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Residential Double-Wall Indirect Water Heaters

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  • Heat Exchanger-Double wall 1½" O.D. glass coated (Ultonium®) steel coil. The positive leak path between the two walls of the coil ensures the potable water will stay separate from the hydronic fluid.
  • Low Heat Exchanger Head Loss-Up to 10 GPM flow, with less than 5 ft. of head loss. Greatly reduces the required pump size for heat exchange.
  • Factory Installed Sparge Tube System-Cold water inlet sediment reducing device helps to minimize sediment build up in tank. Increases first hour delivery of hot water while minimizing temperature build up in tank.
  • Ultonium® Lining-Niles Steel Tank water heater tanks are protected from the corrosive effects of hot water by an exclusive ceramic porcelain-like coating. The Niles Steel Tank high silica Ultonium® lining provides a tough interior surface for our hot water tanks.
  • Fully Automatic Controls-Fast acting surface-mount thermostat for automatic temperature control.
  • Supply and Return Connections-The 3/4" NPT female connections are located on the front for both the boiler supply and boiler return./li>
  • 2" Non-CFC Foam Insulation-Covers the sides and top of tank to save energy by retarding loss of heat. Also increases jacket rigidity.
  • Water Connections-3/4" NPT factory installed true dielectric fittings extend water heater life and eases installation.
  • Two Protective Aluminum Rods-Provide added protection against corrosion for long trouble-free service.
  • Stand-by Heat Loss-Less than 1/2°F per hour (ASHRAE 90.1b current standard).
  • Steel Tank-Heavy gauge steel automatically formed, rolled and welded to assure a continuous seam for glass lining.
  • T&P Relief Valve Included-All models feature opening on side of tank.
  • Brass Drain Valve.
  • I=B=R Certified-These water heaters are rated by the Institute of Boiler and Radiation Manufacturers (I=B=R) to provide accurate performance data within the standards of the certification. The I=B=R rating is issued by the Hydronics Institute Division of GAMA and provides a recognized standard for proper comparison of hydronic appliances.