* The “cold-water sandwich effect” is the undesired introduction of cold water into the hot water supply line on occasions of frequent on/off operations. (Measure Guideline : Transitioning to a Tankless Water heater, DOE, Sept.2012).

With Navien's Ready-Link® cascading technology, when a unit gets up to 80% capacity the next unit will turn on to help meet requirements. The flow on demand ratio will continue until all 32 units are generating hot water as needed. The Navien cascading system also balances out the workload of each unit for longer life.

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Under Sink Guardian® Thermostatic Mixing Valve, Series/Model: Series LFUSG-B, Nominal Size: 3/8 IN, Connection Type: Male Compression, Ports/Ways: 4-Port, Pressure Rating: 30 - 150 PSI, Flow Rate: 0.25 GPM Minimum, Temperature Rating: 80 - 120 DEG F, 120 - 180 DEG F Hot Inlet, 39 - 80 DEG F Cold Inlet, 5 DEG F Minimum Inlet Temperature Differential, Brass Body Material, Trim Material: Buna-N Disc, Seal Material: Buna-N O-Ring, Industry Standards: ASSE Standard 1070, IAPMO Certified, cUPC Listed, 3-3/16 IN Width, 3-3/8 IN Height, Lead Free: Yes

NaviLink & NaviLink Lite make it easy to communicate with your Navien systems anywhere internet service is accessible. The NaviLink system attaches easily to any new or existing* Navien tankless water heater, combi‐boiler and boiler. NaviLink Lite is great for single residential units and magnetically mounts to the side of the unit or can easily be mounted on the wall. Also, NaviLink Lite does not require external power.

Navien’s new backlit EZNav™ control panel uses simple text and icons to make set up, operation status and troubleshooting faster and easier than ever before.

This 3/8 IN under sink guardian® lead-free thermostatic mixing valve is used in commercial and residential applications to control the hot water temperature and minimize the potential for accidental scalding. It is suitable for kitchen and bath installations where the water delivered to the fixtures is intended for bathing or washing. The double throttling design controls both the hot and cold water supply to the mixed outlet. This valve consists of a lead-free brass body, 3/8 in male compression fittings, copper thermostat, check valves, integral strainer with 40 mesh stainless steel screens, and a tamper resistant locking cap. The maximum working pressure is 150 PSI (10.3 BAR). The water temperature can be field adjusted between 80 - 120 DEG F (27 - 49 DEG C). The recommended maximum temperature is 110 DEG F (43 DEG C).

Navien’s patented ComfortFlow® system is the first to include a buffer tank, recirculation pump and fine-tuned controls into a tankless water heater, resolving the cold-water sandwich effect* and issues of minimal flow rates commonly found in other tankless water heaters.