Lennox COWB3 Oil-fired Water Boiler

The COWB3’s sealed combustion design provides quiet, safe, draft-free heating. It also integrates easily into your home’s existing radiator system for continuous comfort all winter long.
Efficient, quiet warmth you can count on

Features

Efficiency that’s always a warm welcome

The COWB3 offers an efficiency of up to 85.2% AFUE, meaning it can deliver significant energy savings, compared to an older boiler. That means you don’t have to worry about high heating bills, no matter how cold the winter gets.

Hot water at virtually no extra cost

By installing an optional tankless coil, you can enjoy hot water for regular use in your home during winter months, without spending extra money on energy.

Reliable, tested and ready to work for you

The COWB3’s cast-iron heat exchanger offers long life and dependable operation. It also features a Beckett® burner that sets the standard for reliable, fuel-efficient heating.

Made with innovation throughout

The COWB3’s sealed combustion design provides quiet, safe, draft-free heating. It also integrates easily into your home’s existing radiator system for continuous comfort all winter long.

Feature COWB3 Boiler

COWB3 Boiler

Efficiency Up to 85.2% AFUE
Fuel Source Oil
Sizes/Capacities Three
Burner Type Beckett
Warranty 20-Year Limited Warranty on Heat Exchanger; 5-Year Limited Warranty on covered components. This product may be eligible for 10-Year Limited Warranty coverage with product registration.

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