Different tankless water heaters a consumer might have installed by San Diego plumbers, include Navien, Noritz, Rheem and Rinnai. Each have there own system of listing things like the age of the unit on the warranty data plate.
A Navien data plate looks like the photo below. See the number between two letters in the middle of the serial number? On this unit, the number “14” shown between “C” and “X” says this particular tankless water heater was manufactured in 2014.
Here’s a data plate from a Noritz Tankless Water Heater:
If you experience a problem with your Navien tankless water heater, the age of the system is one of the first places to start in determining what to do next. System age will help determine warranty coverages if any, options for upgrades, such as installing recirculating pumps (https://www.cariniair.com/plumbing-services-2/hot-water-recirculation-systems/) and the average amount of time you might expect for the remaining useful life of the system.
For more information about Tankless Water Heaters in San Diego, contact: Carini Heating, Air and Plumbing at 619-843-0997.