How old is my Rinnai water heater?

1. Find the rating label: On the unit's rating plate; Rinnai's North American pages checked do not describe its position, so check the installation manual.
2. Take a photo of the whole label, or note the model and serial numbers.
3. Check it on Appliance Age. It is free, and no account is needed.

On the unit's rating plate; Rinnai's North American pages checked do not describe its position, so check the installation manual.

Keep the model, serial and any separate production code or printed date together. Not every serial number contains a publicly decodable date.

Use the format that belongs to this product family. A printed production date, a supported serial code or manufacturer confirmation can establish the age. Repeating year codes may leave more than one possible year; a model-series introduction date helps narrow the range but does not date your individual unit.

Water Heaters typically last 8 to 12 years. Use, water quality and maintenance matter more than the brand. Drain a few litres from the bottom yearly and check the anode rod every few years to slow corrosion.

25 Rinnai models are currently ENERGY STAR certified, 25 of them sold in Canada. The certified models went on the market between 2024 and 2026. An older Rinnai water heater may use more energy than today's certified models.

Source: ENERGY STAR open data, 2026-10-08.

Parts that wear out most often on water heaters:

• Anode rod
• Heating element
• Thermostat
• Temperature and pressure relief valve
• Thermocouple or flame sensor
• Drain valve

Have the model number from the rating label ready so the parts fit.

Every Rinnai check is compared with Health Canada, U.S. CPSC and U.S. NHTSA recall notices.

Questions

How do I find out how old my Rinnai water heater is?

Find the rating label (On the unit's rating plate; Rinnai's North American pages checked do not describe its position, so check the installation manual), then enter the serial number or a photo of the label on Appliance Age. It checks supported serial date codes or a printed date for you, free; some formats need more information.

Where is the serial number on a Rinnai water heater?

On the unit's rating plate; Rinnai's North American pages checked do not describe its position, so check the installation manual.

Can I tell how old my Rinnai water heater is by the model number?

The model number tells you which model it is, not when your unit was made. Look for a manufacture date or a supported date code in the serial number, printed next to the model number on the same label.

Can I decode a Rinnai serial number myself?

Some Rinnai product families have serial date codes, while others need a printed date or manufacturer confirmation. Repeated year codes can produce multiple candidate years; the model and original documents help resolve them.

How long does a Rinnai water heater last?

Water Heaters typically last 8 to 12 years with normal use and maintenance.

Where can I get Rinnai water heater parts?

From an appliance parts retailer. Have the model number from the rating label ready so the parts fit.

Other Rinnai appliances

• Rinnai tankless water heater
• Rinnai boiler