24/7 Emergency Service Available (631) 862-6016

Serving Nassau & Suffolk Counties Since 1983

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Count On Us For Sales, Service & Installation of:

  • Air Conditioning Systems
  • Ductless Air Conditioning
  • Heating Systems
  • Indoor Air Quality Products
  • Gas & Electric Water Heaters
  • Humidifiers
  • Ventilation
  • Thermostats

Quality Workmanship
at Affordable Prices!

Residential & Commercial

Air Conditioning & Heating Expertise on Long Island Since 1983

At DML & S Air Conditioning & Heating, we’re here to help your create and maintain a healthy indoor climate in your home or commercial property. As a full-service HVAC contractor, we provide both residential and commercial heating, cooling and indoor air quality products and services. Our family owned business has been serving Long Island for over 30 years and we are proud of our reputation for professional, courteous and attentive service.

What's New?

Replace your system and get up to $1,400 per unit in rebates with the PSEGLI Cool Homes Program. Only available through approved contractors. Learn more.