Whether you need an endless supply of hot water, efficient home heating or both, Navien has the perfect energy efficient solutions.

Navien offers the industry’s most advanced condensing tankless water heaters, condensing boilers and the first combi-boilers strong enough to support whole house heating and hot water for larger homes.

Navien was the first manufacturer to bring commercial-grade whole-house heating and advanced domestic hot water capabilities to larger homes — providing homeowners with a variety of solutions that are powerful, efficient, and eco-friendly.

A tankless water heater, also called "On-Demand Water Heater", will only heat the water when there is demand, or flow, through the unit.  Inside the unit is a heat exchanger with small passageways, a burner, and some type of flow detection switch.  When flow starts, the unit will activate the burner and with the smaller water waterways the water is quickly heated to the desired temperature before leaving the unit.  They are called tankless, since there is no large tank of water that is continuously heated 24/7 when there may be no demand.

Since tankless units will control the amount of flow to maintain a consistent outlet temperature, they need to be able to provide enough flow for the highest demand the job requires.  That demand is based on the flow rate of all fixtures that may be used at the same time.  A qualified contractor can help to determine flow rates and demand to properly size a tankless unit.

Although tankless units are often referred to as "Instantaneous", there are multiple factors that will affect how quickly the water will produce the required set temperature.  Once the unit detects flow, it must go through multiple steps to ignite the burner and reach the required operation.  Generally the start up of the unit happens quickly, with water leaving the unit reaching the desired set temperature within 5-10 seconds.  The distance from the water heater to the fixture will also affect how quickly that water gets "hot" since that water must get from the unit to the faucet or fixture.

Once the tankless water heater detects flow and begins to heat water, the unit will provide continuous hot water at the desired set temperature until the flow through the fixture (and the unit) stops.  Tankless units provide endless hot water, so the hot water only ends when the faucet is turned off.

The water heater has multiple control features that ensure safe and proper operation.  If the unit detects an issue, it will shut down and display an error code on the front display.  To reset the water heater, press the RESET button on the front control panel.  On newer units the reset button is labeled as a return arrow.  The unit will attempt to restart after resetting, and may resume operating.  If conditions still exist that prevent operation the error code will reappear.  Any time an error code appears on the unit, a service contractor should verify the proper set up and operation of the water heater.

Tankless installation requires knowledge of gas line sizing, venting requirements, and water flow demands.  Due to the multiple requirements for proper installation, Navien requires a qualified contractor install the unit.  Navien products not installed by a qualified contractor will void the warranty.  Please consult with a plumbing, HVAC, or mechanical contractor for installation.  To find a contractor refer to the Navien website. 

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