Rheem-Ruud® Water Heater Age

The date of production/manufacture or age of Rheem-Ruud® Water Heater(s) can be determined from the serial number.

Serial number styles/formats found are:

→Style 1: D1114A441408265A
→Style 2: RHNG 0804P000036 (Serial Number begins with letter prefix – i.e. R; RH; RNG; RHNG; etc.)
→Style 3: 05.05-000021

Legend:  Year is RED;  Month is GREEN;  Week is BLUE

Style 1:    D1114A441408265A

Style 2:    RHNG 0804P000036

Prefix can be R; RH; RNG; RHNG; etc.

Style 3:    05.05-000021

Every effort is undertaken to offer you correct and concise information to assist you in determining the age or manufacture date of water heating equipment. Anytime anyone is dealing with numbers and letters in determining data, mistakes and misinterpretation are bound to happen. For this reason if you find during your research that we may have erred please contact us. In addition perhaps you have come across a brand, model or serial number format that we have not addressed. Contact us with your concerns or new submissions. Please include all pertinent information including clear and legible pictures of data/nomenclature plates.