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About GMG HVAC INC.

A Long Island HVAC Company You Can Count On

GMG HVAC INC. is a local and family-owned HVAC company dedicated to understanding the individual needs of our customers in order to maximize your overall safety and comfort indoors. Our team of licensed, insured, and certified technicians are highly trained in the most advanced HVAC systems on the market, so you can count on all of our results to be long-lasting and energy- and cost-efficient. We operate in Central Islip and throughout Suffolk counties—and we are available when you need us most, offering same-day appointments.

We install, repair, maintain, and replace the HVAC systems you depend on most, including:

Why Choose GMG HVAC INC.?

Our team understands that inviting a service technician into your home requires a level of trust, and we work tirelessly to honor that trust—going above and beyond to exceed your expectations.

When you call GMG HVAC INC., you can expect to receive:

Fast response times: We are often able to solve your HVAC issue the same day you call.
Trained, professional, and friendly technicians: We are a fully licensed and insured team, with every one of our technicians being EPA-certified and background checked.
Advanced, energy-efficient systems: Our team wants your new HVAC systems to run optimally for years to come, so we work with you to find a system that best matches your specific needs.
Honest advice to boost your systems’ longevity: At GMG HVAC INC., we understand that new HVAC systems are a big investment, and we want to maximize your return on investment. That is why we offer honest recommendations and annual preventative maintenance treatments to ensure a properly functioning system that lasts.
Service performed with care and integrity: We are a local Long Island small business that genuinely cares about our community, so we approach every service with the utmost commitment to care, integrity, and quality.

Call our team today at (631) 309-2535 or fill out our quick and easy online form.

Certifications And License Requirements

Fdny G60 Torch Certified
Fdny F60 Fire Guard for Torch Operations Certified
Best Of Long Island Nominee 2019,2020,2021
Suffolk Home Improvement Lic# H-60149
Suffolk Restricted pluming Lic# Rp-60150
Suffolk Restricted Electrical Lic# RE-60168
Suffolk Restricted pluming Natural Gas Lic#RP-60148
Town of Islip Lic#470/384

A GMG HVAC Experience

What Our Past Customers Are Saying

Quick and painless repair on my HVAC.
“Jocelyn is very responsive and Joe is very professional. I received multiple options which was incredibly helpful. I'll have them bookmarked.”
- Daniel L.
What a fabulous experience I had with GMG HVAC INC!
“I looked at the reviews on this company before I called them. Saw they were known for their honestly. That’s what I wanted and certainly what I got - in addition to professional, quality service.”
- Red B.
Professional, Helpful, Reasonably Priced
“Our AC suddenly stopped working- we called and they were able to come out within a couple of hours to help- and thankfully were able to get our AC working again! We are so appreciative and will definitely continue working with them.”
- Caitlin R.
Professional service at a reasonable price. Customer service is excellent.
“They understand my needs and get the right people to do the job. They also communicate well with my GC regarding residual painting that needs to be done. They always clean up after themselves leaving job site clean and neat. They pay attention to details.”
- Joanne C.
Fast, efficient, knowledgeable and honest service!
“Very reasonable and family owned, who could ask for more nowadays? Highly recommend. He is unquestionably my go to guy from now on! Thank you Andrew!!”
- Elyse G.