New Title

New Title

One-Year Guarantee for New Installs

Free On-Site Estimates for New Equipment

Emergency Services Available

Request Lorem Epsom

Hero Request Form

AC 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 Cooling Excellence Since 1937

Donlon Brothers Heating & Cooling Inc has been providing reliable air conditioning services to Bayport, NY since 1937. As a fourth-generation, family-owned business, we understand the importance of keeping your home comfortable during the warmest months. Our first responder-owned and operated company delivers personalized cooling solutions backed by decades of experience and Local 355 certification.

Serving Suffolk County, NY, we offer comprehensive air conditioning services with a commitment to quality that only a small, locally-owned business can provide. Fully licensed and insured, we offer emergency services when you need them most, along with first responder and senior citizen discounts. Ready to experience better service? Contact us for a free on-site estimate today.

Text START to (631) 309-2519 to begin receiving announcements by text.

Msgs may be autodialed. Consent to texts not required to purchase our svcs. Msg. and data rates may apply. To unsubscribe text STOP.

Text Now!

Why Choose Us

White checkmark inside a black circle icon on a white background

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 checkmark inside a black circle on a white background.

Family-Owned & Operated

White check mark inside a black circle icon

Licensed & Fully Insured

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

First Responder-Owned & Operated

Utility room with a white water heater, boiler equipment, pipes, valves, and a bucket against a concrete wall.

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.
AC Installation
Our certified technicians install air conditioning systems from trusted brands including Rheem, Comfort Air, and Carrier. Every new installation comes with a one-year guarantee, and we'll discuss manufacturer warranties to make sure your investment is protected.
AC Maintenance
Regular maintenance keeps your cooling system running efficiently throughout the season. As a certified NORA instructor, I bring advanced technical knowledge to every service visit, and our service contract discount makes ongoing care affordable for homeowners across Suffolk County.
AC Repair
When your air conditioner breaks down, our emergency services are available to restore comfort quickly. We diagnose and repair all makes and models with the precision and care that comes from being a small business that values every customer relationship.
AC Tune-Up
A seasonal tune-up optimizes your system's performance and helps prevent costly breakdowns during peak cooling season. Our thorough inspections and adjustments keep your equipment operating at maximum efficiency, saving you money on energy bills while extending the life of your investment.
Black outlined briefcase icon with a handle and flap on a white background

Short title 11

Describe some quality or feature of the company. Write a short paragraph about it and choose an appropriate.

Black line icon of a handbag or purse on a white background

Short title 12

Describe some quality or feature of the company. Write a short paragraph about it and choose an appropriate.

Simple black outline of a handbag or briefcase icon on a white background

Short title 13

Describe some quality or feature of the company. Write a short paragraph about it and choose an appropriate.

Simple black outline of an envelope icon with a handle on top

Short title 14

Describe some quality or feature of the company. Write a short paragraph about it and choose an appropriate.

Simple black outline of a handbag or briefcase icon with a curved handle

Short title 15

Describe some quality or feature of the company. Write a short paragraph about it and choose an appropriate.

Recent Projects

Turquoise ocean waves crashing with white foam in a close-up seascape
Winding river cutting through dense green forest aerial view
Wind-sculpted sand dunes with rippled shadows in warm beige and brown tones
Person icon with speech bubble containing three stars, suggesting a rating or review.

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.