Would anyone know the age of a Gama water heater s/n:
9436104292 m/n:G1E4034TN3



Just a guess, 1994

Gama does not manufacture or sell heating equipment. It is an association of manufacturers and supplies efficiency ratings (but doesn’t mark the rating on the equipment). At times it has been the only name I’ve been able to find on a furnace, so I called them today.

They supply free equipment ID including date of mfg, but only for the last couple of years and I don’t know how well their site works… I tried it for the first time today with no luck.

They referred me to the Preston Guide site for older equipment.