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Heating Services
Bayport, NY

One-Year Guarantee for New Installs

Free On-Site Estimates for New Equipment

Emergency Services Available

Request Lorem Epsom

Hero Request Form

Four Generations of Heating Excellence Since 1937

Since 1937, Donlon Brothers Heating & Cooling Inc has provided dependable heating services to Bayport, NY and surrounding areas. As a fourth-generation, family-owned business, we understand the importance of keeping your home comfortable during the coldest months. Our first responder-owned company combines decades of industry knowledge with personalized attention that only a small, local business can provide.

Serving Suffolk County, NY, we specialize in complete heating solutions, from installation to maintenance and repair. We're certified NORA instructors and members of Local 355, ensuring every job meets the highest standards. If you need emergency service or a free on-site estimate for new equipment, our licensed and fully insured team is ready to help. For reliable heating services, contact us today.

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Why Choose Us

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One-Year Guarantee for New Installs

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Free On-Site Estimates for New Equipment

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Emergency Services Available

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Family-Owned & Operated

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Licensed & Fully Insured

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First Responder-Owned & Operated

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Why Choose Us

White checkmark inside a black circle icon

One-Year Guarantee for New Installs

White checkmark inside a black circle icon

Free On-Site Estimates for New Equipment

White checkmark inside a black circle icon

Emergency Services Available

White check mark inside a black circle icon on a white background

Service Contracts Available

White checkmark inside a black circle icon

Family-Owned & Operated

White check mark inside a black circle icon on a white background

Licensed & Fully Insured

White checkmark inside a black circle icon

First Responder-Owned & Operated

White check mark inside a black circle icon

Four Generations of Experience

Utility room with a white water heater, boiler equipment, pipes, valves, and a bucket against a concrete wall.
Heat Pump Installation
Our team installs energy-efficient heat pump systems from trusted brands including Rheem, Carrier, and Comfort Air. We provide free on-site estimates and back every new installation with a one-year guarantee, ensuring your investment delivers lasting comfort and efficiency.
Heater and Furnace Installation

When it's time for a new heating system, we install quality furnaces and boilers including Peerless and St. Roch models, paired with reliable Beckett and Riello burners. As a small business, we offer personalized service and will consider competitive bids to meet your budget and heating needs.

Heater and Furnace Maintenance
Regular maintenance keeps your heating system running efficiently and prevents costly breakdowns. Our preventative service plans include thorough inspections and tune-ups, with special discounts available for first responders, senior citizens, and service contract holders.
Heater and Furnace Repair
When your heating system fails, our emergency services are available to restore warmth quickly. We service all major brands including System 2000 controls, Bock and Heat Flo water heaters, ensuring your equipment operates safely and efficiently when you need it most.
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Recent Projects

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Here's what our satisfied customers are saying...

At Donlon Brothers Heating & Cooling Inc, we take pride in providing exceptional HVAC services to our customers. We would be grateful if you could share your thoughts about our HVAC company with others. Your feedback helps us improve and helps others make informed decisions. Please take a moment to leave a review of Donlon Brothers and let others know what you think.