DML & S Air Conditioning & Heating
DML & S Air Conditioning & Heating is a HVAC provider serving Smithtown, NY. Rated 4.7★ with 15 Google reviews. See services, review signals, and request a quote.
HVACSmithtown, NY
On this page
Company overview
- TradeHVAC
- Service areaSmithtown, NY
- Google rating4.7★ (15 reviews)
- Phone(631) 862-6016
- Address6 Floral Ln, St James, NY 11780, USA
Photos
Photos from Jhovani Garcia Perez, Don D'Angelo, DML & S Air Conditioning & Heating
What customers say
“Donny and Russ are the most impressive professional — trustworthy people— to have ever done any work in our home. I can recommend them easily —and highly— they are incredibly knowledgeable and so hone…”
“Don is a true professional and has been serving Suffolk and Nassau for years!!! About 13 years ago he and his dad did a major repair and today Don returned to provide timely, honest and fair service …”
“I have been working with Donny from DML&S for close to 10 years. He is very good. Punctual, reliable and when his team leaves my house it's like they were never there. Very clean work. His prices are …”
“Donny from DML&S inspires confidence and trust. Made a great first impression when he serviced my mother-in-laws A/C ~5 years ago. I have used him since and recommend him to others without reservation…”
“Donny and Mike have always been extremely honest, on time, and have done right by me for my heating and A/C needs. When I have an emergency, they always come quickly and are pros at what they do . Hig…”
Key highlights
Strengths
- Highly rated (4.7★ average)
Things to ask
- Confirm availability for your area and timeline
- Ask about warranty terms on parts and labor
- Request a written estimate before work begins
- Ask about payment plans or financing
Explore nearby research
Frequently Asked Questions
What services does DML & S Air Conditioning & Heating offer?
DML & S Air Conditioning & Heating provides: HVAC diagnosis, repairs, and full system installs. They serve residential and commercial customers in Smithtown, NY.
What is DML & S Air Conditioning & Heating's rating?
DML & S Air Conditioning & Heating has a 4.7 out of 5 star rating based on 15 Google reviews.
Is this company licensed in New York?
All listed providers have a verified New York contractor license at time of publication. You can verify on the New York Department of State (consumer protection) plus local licensing (NYC DCWP, county Consumer Affairs) lookup at https://a858-elpaco.nyc.gov/CitizenAccess/.
Does DML & S Air Conditioning & Heating offer emergency service?
Contact them directly to ask about emergency availability and after-hours service.
How do I request a quote?
Use the CTA below to submit your ZIP. You can message this company alongside two or three other local pros for easy comparison.
Licensing verified 2026-04-22. Reviews refreshed 2026-04-22.
Licensing data: New York Department of State (consumer protection) plus local licensing (NYC DCWP, county Consumer Affairs) · Company data: verified business records + Google Business profile
See our editorial standardsReport inaccurate info about DML & S Air Conditioning & Heating
Request a quote from DML & S Air Conditioning & Heating
Enter your ZIP and we will line up a free estimate alongside other top local pros.
Own or manage this business? Claim this listing to earn a verified-owner badge.