DML & S Air Conditioning & Heating

★★★★★ 5.0 / 5 (3)
Emergency Call


: 6 Floral Ln, Saint James, NY 11780
: (631) 862-6016
: http://www.dmlsair.com

Company Overview

Cooling systems, heating, and furnace repair and installation, electrical services, water services.
My dad started the firm in 1983. Our team is a family-owned company operating in Nassau County & Suffolk. We take pride in developing long-lasting bonds with our clients, and we love keeping many of the loyal customers for three decades 30 years.
The founder established the business in the early '80s. I have over 20 years expertise in the industry, I manage the company with my sibling. We value our services and appreciate updating our clients in the loop. Our team is a small and run operation and aim to create lifelong connections with our clients.

Business Services

  • Electric inspection
  • HVAC installation or replacement
  • HVAC system repair
  • HVAC system maintenance
  • Plumbing inspection
  • Plumbing repair
  • Water pipe repair

Business Location & Hours



Mon:8:00 AM - 5:00 PM
Tue:8:00 AM - 5:00 PM
Wed:8:00 AM - 5:00 PM
Thu:8:00 AM - 5:00 PM
Fri:8:00 AM - 5:00 PM
Sat:Closed
Sun:Closed

Recommended Customer Reviews

Francis E.
★★★★★

Very professional and knowledgeable. They are always on time and go above and beyond to do the best work. Couldn't be happier with my ac thank you DML&S.

Jay T.
★★★★★

We recently purchased our first home early last year. It is a historical home built in 1920s, in which needed some moderate updating. One of which was our boiler that we wanted to convert from oil to gas. Since this being our first home and an older home we contacted many Long Island larger companies to find out what it would cost us and what it would take to convert as well as making our home more energy-efficient. After speaking with some of the larger companies we were not at all impressed nor did they offer us the quality work we needed to last us 20 years plus.
We reached out to some friends for help, this is when they recommended Donny.
Right off the bat Donny was informative upfront and told us step-by-step what our options were. We soon realize that the larger companies were clearly gouging us and we were not going to be as efficient as we needed.
Once we decide to go with Donnie and his company we realize we made the right choice. Donny kept communication lines open during the entire process, as well made sure that all the tedious paperwork was filed and done. He came in with his master plumber, who redesigned our manifold and zones. Scott the plumber's work is beyond impeccable and clean. He is simply a master plumber/artist in what he does. This without a doubt has increased the value of our home.
While my wife works from home it was very rare for me to feel comfortable with someone that was working in our house alone with my wife. And after meeting and speaking with Donny and Scott I realize that this was no problem at all.
These men are simply good and honorable and their work shows it. If anyone of my family or my friends needed a plumber or electrician I would without a doubt hands-down recommend Donny. We will be using them again in the future for a cooling system.
Thank you for for all your hard work.

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