Rinnai Cu199en 9.8 Gpm Commercial Condensing Tankless Water Heater

The Rinnai Sensei Commercial CU199 is a super high efficiency, Commercial Energy Star Certified, tankless hot water heater. The commercial line offers 97% Thermal Efficiency with a heat exchanger built for commercial demands. The CU199 is designed specifically for commercial use with precision engineering to give you an endless supply of hot water. Restaurants and hotels, as well as multi-family dwellings and schools are perfect applications for a commercial tankless water heater. Cascade Logic and Cable Assembly
is available for the CU199 tanks. With Cascade Cables used to connect up to 24 water heaters together, Cascade Logic rotates water heater operation to ensure the entire system gets equal usage and functions as a single hot water source. In a commercial installation where you may need to use more than one unit, Rinnai offers many Tankless Rack Systems for installation flexibility as well. The Tankless Rack system is available for wall mounted or freestanding installation for two or more units. This item, the CU199e, is for outdoor installation and does not require venting. Because of extreme temperatures and exposed water lines, outdoor / exterior installation it is not recommended in locations from Virginia and north. Also keep this in mind in mountainous regions of the country where extreme temperatures may also exist.
The Rinnai Sensei Series with condensing technology offers built-in freeze protection down to -4°F on the outdoor units. The unit features an integrated check valve located between the turbo fan and the combustion chamber to prevent cold air from entering the venting system and backflow of exhaust in common vent applications. The Fiber Mesh Premix Burner helps to provide even flame distribution for optimal performance for any demand.
It features 199,000 BTUs and hot water delivery with a flow rate that ranges from 0.26 - 9.8 GPM. The minimum GPMs is perfect for low demand uses such as shaving, where warm water is needed but not at a high rate! The MCC-91-2US controller is included with the water heater as part of the front panel. The default minimum temperature setting is 98° with a maximum of 140°F. The unit offers a maximum setting of 185°F with parameter adjustment. A parameter adjustment on the CU199 unit can be made for greater hot water flow - up to 11 GPM - as well.
In a condensing tankless water heater, such as the CU199, once you turn on the tap, cold water goes into tankless heater and the flame is activated. Water is pre-heated as it passes through the primary stainless steel heat exchanger then continues to be heated as it passes through the coils in the secondary heat exchanger, exits the water heater, into your pipes and up to the fixture calling for the hot water. Depending on the amount of hot water called for, the flame adjusts accordingly to heat more or less water.