Navien, a Korean manufacturer of water heaters is known for making some durable tankless units. Pictured below is their flagship NPE 240A2 model which we like to install here in Santa Barbara, CA. These units are equipped with dual stainless steel heat exchangers and come with a built in recirculating pump. For this particular application, since there was no dedicated recirculating line, we installed the Navi Circ crossover valve underneath the bathroom sink that was furthest away from the unit.

Based on our local temperature rise of about 60 degrees Fahrenheit, this Navien NPE 240A2 can put out 6.5 gallons per minute, allowing 3 showers to be running simultaneously with no worries of running out of hot water.

What I also like about these units is the ability to run the 2” venting up to 75ft and the 1/2” gas feed up to 24ft.

These units come with a 5 year warranty on parts and 15 year warranty on the heat exchanger.

Remember that these units need to be serviced about every 12-18 months depending on if you have a water softener.

You can goto Navien’s website if you feel the need to look into these products more. https://www.navieninc.com/products/npe-240a2