Before your scheduled appointment, make sure our technicians can easily access your HVAC system and thermostat. Clear away any items or obstacles surrounding your heating or cooling equipment to allow our team to work effectively. If you've noticed particular problems or concerns with your system, jot them down so we can address everything during our visit. We also ask that you keep pets in another room to ensure our technicians can work safely and without disruption.

Absolutely. Donlon Brothers Heating & Cooling Inc backs the quality of our work and the equipment we provide. We offer warranties covering both labor and parts, with specific details varying based on the service or equipment involved. At the completion of your service or installation, our technicians will review the warranty coverage that applies to your particular job. Your complete satisfaction is our priority with every project we undertake.

Donlon Brothers Heating & Cooling Inc delivers complete heating and air conditioning services for both residential and commercial properties across Suffolk County, NY. We handle installation, repair, and maintenance for furnaces, boilers, central air conditioning systems, heat pumps, and ductless mini-split systems. Our offerings also include indoor air quality improvements, thermostat installations, emergency repairs, and seasonal maintenance plans designed to keep your HVAC equipment operating efficiently throughout the year.

Our family began serving the community in 1936 when our grandfather started the business. Taylor established Donlon Brothers in 2011. We're a proud family-owned company with four generations of expertise in oil burner and boiler service and deep ties to the local area. As a business founded and run by first responders, we apply the same dedication, integrity, and dependability to every project. We've built our reputation on lasting customer relationships and a steadfast commitment to honest, trustworthy service.

Our office hours are Monday through Friday, 9:00 am to 5:00 pm. We're closed on Saturday and Sunday. Emergency service is available when you need it.

We accept cash, checks, and all major credit cards. Financing options are also available through Synchrony Bank.

Yes, we provide complimentary on-site estimates for new product installations.