Residential Water Heaters

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GIANT manufactures a complete line of residential – electric, gas and oil-fired water heaters using the best raw materials available in Canada. We manufacture most of our components and are the ONLY MANUFACTURER operating in Canada.

Our automated plants enable us to revolutionize the industry with competitive products that meet your daily hot water needs!


Point of Use

Compact water heaters can be installed wherever a small amount of hot water is needed such as in a cottage, an office, a store or in isolated bathrooms.

Standard, Cascade & Super Cascade

Standard residential electric water heaters have a factory-installed heat trap. It helps reduce the migration of hot water, thus limiting heat loss escaping through inlet and outlet fittings.

Cascade and Super Cascade models are designed with a cold water inlet at the bottom of the tank. They allow you to get 10% more hot water compared to traditional top entry water heaters.

ECOPEAK® technology

Available in 60 Imp. Gal. capacities, these water heaters have three heating elements, they are more energy efficient in peak periods than a traditional two-element model.
For experts only

Expert Plus

These highly durable water heaters are made exclusively for certified contractors and qualified installers. Only these professionals can ensure that your water heater is installed in accordance with current codes and standards. You’ll get a superior quality water heater, a better warranty and expert service, ensuring peace of mind for years to come.


Atmospheric Vent

These gas-fired water heaters are equipped with eco-friendly burners (LOW NOx) for effective, pollution-free combustion. FVIR technology prevents the ignition of flammable vapours (including aerosols, solvents, gasoline, paint, paint thinner and lacquer) outside of the water heater.

These water heaters require a chimney.

Atmospheric Vent with Powered Damper

These gas-fired water heaters are equipped with a 24 VAC powered damper that includes a standard 110 volt plug-in transformer with an electrical power cord. They come with an adjustable thermostat and automatic controller. These ENERGY STAR® certified models require very little maintenance and offer more hot water and lower operating costs.

These water heaters require a chimney.

Power Vent

These gas-fired water heaters include a powerful blower assembly. No chimney required, simply vent through the roof or an exterior wall. These models come with Intelli-Vent™ electronic gas control that allows precision temperature control and history tracking using error codes.

Power Direct Vent

These power direct vent gas-fired water heaters are equipped with Intelli-Vent™ gas control, a sealed combustion chamber and ¾-inch NPT-F side tappings for high-capacity units. They could be used with standard 90° elbow or concentric terminations. Combustion product can be vented horizontally through an exterior wall or vertically through the roof. Since no ambient air is used for combustion, the outdoor air supply pipe connects directly to the water heater.



This oil-fired water heater provides constant hot water as long as the demand remains within the unit’s recovery limits.

Storage Tanks

Storage Tanks

Offered in 30, 40 and 60 imperial gallon, these tanks keep water at a constant temperature, regardless of demand. When selecting your storage tank, optimize your comfort and choose a potable water or space heating application. These storage tanks are ideal for modern households that require larger volumes of hot water for multiple bathrooms, multi-showerhead systems, extra-large bathtubs or whirlpools, spas, etc.