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Bryant Boilers

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Bryant makes four different series of oil and gas boilers, which vary in efficiency from 81.6% AFUE to 90% AFUE.

Legacy Line BW/BS Boiler

This product has an AFUE of 81.6. It uses a cast-iron heat exchanger, and its burners are made from an alloy of stainless steel and titanium. The casing is insulated fiberglass.

The boiler can be procured in a few different styles: there are choices between water or steam and pilot or electronic ignition.

Preferred Series BW3 Boiler

This boiler has an AFUE of 84.4. It uses internal valves with contours that increase the efficiency of heat exchange by maximizing surface area. A similar result is accomplished with 'thermal pins,' which protrude out into the water.

Both this Preferred BW3 and the Legacy BW/BS are designed for gas fuel.

Preferred Series BW 4/5 Boiler

These boilers have AFUEs of up to 86. They use oil fuel, rather than gas. They also feature a heat exchanger made from aluminum, not steel. The device itself is 220 pounds and uses simple PVC piping. The pipe system allows air to be inputted and outputted from outside the house.

This is the only model with an "Easy Access" burner door for easy maintenance.

The BW 4/5 boilers have received a government EnergyStar due to their relative efficiency.

Preferred Series BW9 Boiler

This boiler is at the top of Bryant's line. It has an AFUE of 90 and is powered by gas. It has mostly the same features as the other boilers. Its heat exchanger is aluminum. It also received an EnergyStar.

Homeowner Information

Bryant boilers should be installed and regularly inspected by a qualified technician. Homeowners should make sure that their boiler always has adequate airflow available. This means both that the boiler should not be surrounded by material and that the room should not be airtight.

The boiler should also be far from insulation and combustible materials.

Leaking water is obviously a sign that the boiler might not be working correctly. If the boiler is leaking or if you smell gas, the boiler can be, and should be shut down using a manual switch.

If the boiler is not working, you should make sure to check its thermostat and power supply before calling a technician. Many states require boilers to be inspected on an annual basis to avoid the extremely dangerous conditions that can occur if they are neglected.


The Legacy boiler, the Preferred BW3, and the Preferred BW4/5 come with a five-year warranty on their parts and a twenty-year warranty on their heat exchangers.

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