How to determine the manufacture date of a Giant water heater
Giant Uses a Date Stamp, Not a Serial Code
Unlike most water heater brands, Giant Factories Inc. does not encode the manufacture date inside the serial number. The production date is printed as a separate stamp directly on the data plate label.
How to find the manufacture date:
1
Check the data plate label
Look for a stamped or printed production date on the rating plate — often near the barcode or to the right of the Giant logo. It may read as MM/YY, MM-YYYY, or a full date.
2
Use Giant's online warranty tool
Giant offers a warranty validation page where you can enter your serial number to look up the manufacture date.
Tip: If a date sticker is present on the data plate, that date is always definitive and takes priority over any other source.
About Giant Water Heaters
Giant Factories Inc. is the only water heater manufacturer based and operating entirely in Canada, with two production facilities equipped with modern manufacturing machinery and more than 300 employees. Headquartered in Montreal-East, Quebec, Giant manufactures residential, light commercial, and commercial electric, gas, and oil-fired water heaters distributed throughout Canada and parts of the United States. The company has built a strong regional presence over decades of Canadian market focus, making Giant one of the most recognized water heater brands in Quebec and across Atlantic Canada.
Giant's product lineup covers the full range of residential water heating technologies, including conventional natural gas and propane tank models, electric storage heaters in multiple capacities, power-vent configurations for flexible installation, and high-efficiency condensing units. Residential tank sizes range from compact 40-litre point-of-use models to large 270-litre storage tanks suited to high-demand households. Commercial offerings extend to large-volume storage systems and high-recovery gas models for apartment buildings, hotels, and food service operations. The company also manufactures specialty products for harsh water conditions and high-altitude installations, reflecting its engineering depth across a wide range of Canadian climates and building types.
Giant backs its products with a Canadian customer service infrastructure including technical support by phone and an online warranty validation tool that allows homeowners and contractors to verify manufacture dates and warranty status using the unit's serial number. Replacement parts are distributed through an established Canadian wholesale network, and the company maintains a network of authorized service providers across the country. Because Giant does not encode the manufacture date within the serial number itself, owners who need to determine a unit's age should check the production date stamp on the data plate, use the online warranty tool, or contact Giant directly at 1-800-363-9354.
Giant Factories Inc. — 40 Avenue Lesage, Montreal-East, Quebec, Canada
