Who We Are

Donlon Brothers is a full-service provider of heating and cooling services specializing in residential system service, installation, and replacement throughout Suffolk County.

Our business stands apart because it is built on four generations of family experience serving local homeowners, a tradition of knowledge and craftsmanship that has been passed down through the years.

• Oil Burner Service, Installation & Replacement
• Boiler Service & Replacement
• Water Heater Service & Installation
• Air Conditioning Service, Repair & Installation
• Preventative Maintenance & Service Contracts
  

Our Mission

Our goal is to deliver dependable heating and cooling solutions that safeguard our customers’ comfort, safety, and investment, all while ensuring an honest and professional service experience. With four generations of experience serving Suffolk County homeowners, we recognize the significance of maintaining home comfort systems in a safe and efficient manner.

First Responder Discount

Senior Citizen Discount

Service Contract Discount

What Sets Donlon Brothers Apart

There are many providers of heating and cooling services serving Long Island, but homeowners choose Donlon Brothers because of our experience, honesty, and dedication to quality work.

• Four Generations of Heating & Cooling Experience
• Family-Owned & Operated by First Responders
• Specialists in Service, Repair & Replacement
• Oil Burner, Boiler, Water Heater & AC Experts
• Competitive Pricing on System Installations
• Preventative Maintenance & Service Contracts Available
• Honest Recommendations — No Pressure Sales
• Licensed & Fully Insured