COWB3 Boiler

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

Categories: Boilers, Oil-Fired Water Boilers Tag: Lennox

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.

Lennox COWB3 Oil-fired Water Boiler Brochure

Lennox COWB3 Oil-fired Water Boiler Manual

Feature	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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People like you shared their purchase and installation experience!

Susanna Pingitore

Susanna Pingitore

I've been a client of Cozy Comfort for 15 yrs. for any HVAC need or service.

My AC broke down in the heat wave and could not be repaired. I called and talked to Brian @ Cozy Comfort.
Explained I was looking for a specific Carrier model and a humidifier as well.
He managed to find it and had both installed by tech. Alex and his crew within a few days. They did a good job and took all garbage with them.

While being installed, other companies I had called for a quote were calling me to inquire what I was looking for. Told them too late!

During this unexpected breakdown in prime summer heat, Brian was patient, quick and fair getting the job done quickly.

These days it is difficult to give a positive review but I highly recommend dealing with Brian at Cozy Comfort for any service they offer.

David Tsuchiya

I had my tankless water heater replaced through Cozy Comfort Plus. Brian was very helpful and his technician did his best to ensure the new model would fit the tight nook that the original one was in. The team installed the new heater quickly and ensured the location was clean afterwards. Overall, I was very satisfied with the installation and service.

Maria Leitao

Maury from Cozy Comfort did a fantastic job of examining the functionality of my furnace and cleaning the major components. He tested my furnace to make sure that it would run efficiently in the winter. My humidifier was cleaned, the drip pad replaced and settings properly set up. Thank you Maury for your effective care. thank you Cozy Comfort- you are a company that has proven your worth over the past 25 years that you have looked after my family's heating and cooling needs.