Best Heating & Air Conditioning / HVAC In Holtsville

“Brian and his team arrived to my home with 5 installation trucks and crew. His team was professional, clean and knowledgeable of the products they were installing. Once completed, Brian sat down with my wife and I and gave us a detailed class on the operation of the 5 new mini splits.
I would highly recommend Twin Air.“

“Wonderful crew, curteous, clean and extremely polite. John and his crew are on top of their game.“

“I can’t say enough good things about Ferrelli Mechanical LLC! From start to finish, their team was professional, prompt, and highly knowledgeable. My HVAC system was on the fritz during a cold snap, and they came to the rescue.

The technician arrived right on time, quickly diagnosed the issue, and clearly explained the repair process. I was impressed by their honesty and transparency—no hidden fees or unnecessary upselling. They had the system up and running in no time, and the price was very reasonable for the level of service provided.

What stood out most was their attention to detail and customer care. They treated my home with respect, cleaned up after themselves, and even followed up a few days later to ensure everything was working smoothly.

If you’re looking for a reliable, trustworthy HVAC repair company, Ferrelli Mechanical LLC is the way to go. They’ve earned a loyal customer, and I’ll be recommending them to everyone I know!“

“My oil tank started leaking and needed a replacement in a short time frame. Thanks to John (Jr), he went above and beyond with relocating the new tank upon my request, along with clean up and tuning my boiler to his recommendation to make it more efficient. A huge thank you! I will not hesitate to call for future needs.“