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Rinnai Water Heater Age by Serial Number
Enter the serial number from your Rinnai water heater's data plate to get its manufacture date, remaining life, warranty and recall status, and a repair-or-replace recommendation.
How to read a Rinnai serial number
We can decode serial numbers from Rinnai water heaters built 1999–2026.
2009–2026 format Corroborated
The serial starts with two letters: the first is the year and the second is the month. For example, ED.CA-026584 was made in April 2013 (E = 2013, D = April). Year letters start at A for 2009 and skip I, O, Q, U and V; month letters run A (January) to H (August).
This format is confirmed by two or more independent references rather than a Rinnai document for this product line, so treat dates from it as likely rather than certain.
2009–2026 format Corroborated
The serial starts with two letters: the first is the year. For example, BL.CA-051306 was made in 2010 (B = 2010). Year letters start at A for 2009 and skip I, O, Q, U and V. When the second letter is J, K, L or M we show the year only.
This format is confirmed by two or more independent references rather than a Rinnai document for this product line, so treat dates from it as likely rather than certain.
1999–2008 format Corroborated
Older Rinnai serials are all digits. The first two digits are the year and the next two are the month, sometimes with a dot between them. For example, 04.03-102521 was made in March 2004.
This format is confirmed by two or more independent references rather than a Rinnai document for this product line, so treat dates from it as likely rather than certain.
Worked examples
year month / week
| Serial | Built |
|---|---|
| ED.CA026584 | April 2013 |
| EE.CA041563 | May 2013 |
| LM.BA152112 | 2019 |
| SL.BA194366 | 2024 |
| BL.CA051306 | 2010 |
| 04.03102521 | March 2004 |
| 050706654 | July 2005 |
How long does a Rinnai water heater last?
| Type | Typical life |
|---|---|
| Tankless | 15–20 years |
| Gas tank | 8–12 years |
| Electric tank | 10–14 years |
| Heat pump water heater | 10–14 years |
Ranges come from industry life-expectancy studies (NAHB/Bank of America, InterNACHI, DOE) and apply across brands. Your result adjusts for your state's climate and water hardness.
Is my Rinnai water heater still under warranty?
- SENSEI condensing models (RU, RUR) and RE Series non-condensing models have a 15-year heat exchanger and 5-year parts warranty in a home. Commercial use drops the heat exchanger term to 8 years.
- HE+ Series non-condensing models (RL75, RL94, RLX94) have a 12-year heat exchanger and 5-year parts warranty in a home.
- HE Series non-condensing V models (V53De, V65, V75, V94) have a 10-year heat exchanger warranty, or 12 years if installed with a tankless isolation valve kit, and a 5-year parts warranty.
Rinnai tankless warranties run from the date of purchase, so keep your receipt. Registering within 90 days of purchase extends labor coverage on tankless units from 1 year to 5 years and counts as proof of purchase. Rinnai recommends installation by a Rinnai-trained professional, and units bought from an unauthorized online seller are not covered.
Rinnai water heater recalls
No CPSC recalls found for Rinnai water heaters.
Recalls come from the U.S. Consumer Product Safety Commission. Decode your unit above to check whether its model and serial fall inside a recall.
Should you repair or replace it?
Once you decode your unit, we compare its age against its typical life, a typical major repair against the cost of replacing it, and, with your model and state, what a new unit would save on energy. A common rule of thumb: if a repair costs more than about 30–50% of a replacement and the unit is past mid-life, replacing usually wins.
FAQ
How do I tell how old my Rinnai water heater is?
The manufacture date is encoded in the serial number on the unit's data plate. The serial starts with two letters: the first is the year and the second is the month. For example, ED.CA-026584 was made in April 2013 (E = 2013, D = April). Year letters start at A for 2009 and skip I, O, Q, U and V; month letters run A (January) to H (August). The serial starts with two letters: the first is the year. For example, BL.CA-051306 was made in 2010 (B = 2010). Year letters start at A for 2009 and skip I, O, Q, U and V. When the second letter is J, K, L or M we show the year only. Older Rinnai serials are all digits. The first two digits are the year and the next two are the month, sometimes with a dot between them. For example, 04.03-102521 was made in March 2004. We can decode Rinnai water heaters built 1999–2026. Enter the serial above to decode it automatically.
How long does a Rinnai water heater last?
Typical lifespans: Tankless 15–20 years; Gas tank 8–12 years; Electric tank 10–14 years; Heat pump water heater 10–14 years. These ranges apply across brands. Maintenance, climate and water hardness move a unit toward one end.
How do I check my Rinnai warranty?
Rinnai tankless warranties run from the date of purchase, so keep your receipt. Registering within 90 days of purchase extends labor coverage on tankless units from 1 year to 5 years and counts as proof of purchase. Rinnai recommends installation by a Rinnai-trained professional, and units bought from an unauthorized online seller are not covered. Register a unit: https://www.rinnai.us/support/registration
Has my Rinnai water heater been recalled?
We found no CPSC recalls for Rinnai water heaters.
Sources: Rinnai service, warranty and installation documentation; independent industry references for formats no Rinnai document covers; U.S. Consumer Product Safety Commission; DOE and ENERGY STAR; NAHB/Bank of America and InterNACHI life-expectancy studies. More about our sources.