PEACHTREE CITY, Géorgie (Sept. 5, 2012) - To make multi-unit condensing tankless water heater installation easier and more flexible for commercial contractors, Rinnai America Corporation is introducing the Rinnai Tankless Rack System (TRS).

The system is available in free-standing or wall-mounted options for indoor or outdoor applications and can be ordered, built and shipped fully assembled, including gas and water manifolds, to any location in the United States and Canada, including the job site.

Indoor installations can be configured with either Rinnai's standard polypropylene concentric venting or its new Common Venting System. Individual racks can hold between two and six of the company’s 199,000-Btu condensing units which have an Energy Factor of 0,95. For even larger tankless systems, multiple racks can be banked to give commercial customers up to 25 units and nearly five-million Btus of input capacity.

The free-standing version of the fully assembled Rinnai TRS fits through a standard 32-inch doorway, even with attached water heaters, for easy moving and installation on the job site. The racks are constructed of powder-coated aluminum to stand up to the most demanding commercial environments, while minimizing weight.

“This Rinnai-engineered system saves valuable installation time and avoids the costly, complicated process of designing and fabricating gas and water manifolds on-site,” said Adam Hersh, national commercial development manager at Rinnai. “The Rinnai TRS features design details that make installation straightforward. Gas and water manifolds are properly sized and, when necessary, electronic controls for multiple units can also be included. The entire system has been designed by Rinnai to ensure maximum safety, reliability and peace of mind.”

The TRS is available with Rinnai’s Common Venting System, which allows for the connection of up to eight 199 000 Btu-condensing units together using the same exhaust and intake venting. The exhaust flue uses a CSA-certified and tested polypropylene venting system. For intake venting, Rinnai has certified Schedule 40 PVC, which can be obtained from local plumbing distributors.

The Common Venting System allows for longer vent runs and utilizes only two terminations for each bank of units. An eight-unit system has a maximum vent length of 41 feet and offers 1.5-million Btus, and for seven or fewer units, the maximum length is 100 feet. The exhaust flue material, PPtl, is currently certified for use in the United States only and not for high-altitude applications above 2 000 ft.

Common Venting is available with the TRS or can be ordered separately for any application requiring multiple condensing units. Rinnai is currently accepting and shipping orders for the TRS and Common Venting and will begin shipping on Sept. 4.

For help with sizing, call a Rinnai Application Engineer at 800-621- 9419 then press 6.