Navien Tankless Water Heater Recirculation Loop

Insulate all hot water pipes to minimize standby energy loss.

Navien tankless water heater recirculation loop.

Typically with tankless water heaters the circulator needs to be properly sized. Recommended pipe size heater count 1 unit 2 units 1 3 units 1 4 to 5 units 1 6 to 8 units 2 9 to 14 units 2 15 to 16 units 3 npe a series tankless water heater. The navien npe tankless water heater is available in two models the s standard and the a advanced. Timed operation is recommended over an aquastat with the timer programmed to recirculate in early morning and evening when demand for hot water is greatest.

The buffer tank eliminates the cold water sandwich effect and issues of minimum flow rates commonly found in other tankless water heaters. The difference between the two is the inclusion of a buffer tank and recirculation pump on the a model. If it is existing and it has worked in the past then there may be something wrong with the circulator. Recirculation valve for use with npe a series tankless water heaters designed for recirculation of domestic hot water in applications where a dedicated return line is not available.

Navien comfortflow is the first and only system that incorporates a built in insulated buffer tank and recirculation pump. So to speak standard recirc pumps are too small to get it the water heater to fire.