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Video

Westchester Mall Night Rig

1 minute
This rigging job has been years into planning for the Westchester Mall. The units are being rigged in overnight so that the units can be online and ready during the day.
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Video

Special Projects – Turn-Key Replacements and High Efficiency System Upgrades

2 minutes
Donnelly Mechanical’s Special Projects division is committed to delivering intelligent HVAC solutions and upgrades. Our primary focus is to provide support and resources for mechanical systems that are above and beyond the general maintenance and repair services scope.
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Video

Donnelly Mechanical 10 Year Club

2 minutes
The 10 Year Club is a group of team members that have been with Donnelly Mechanical over 10 years. We have over 55 employees in the 10 Year Club.
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Video

Employee Testimonials

2 minutes
I love the people most, I love the culture, I love the excitement. When we come across a challenge we are able to accomplish what we're looking to do and make the customer happy.
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Video

Working at Donnelly Mechanical

3 minutes
Since our employees play a major role in keeping our business successful, we believe in treating them the same way. The proof is in our team members – most of our licensed, certified technicians have been employed with us for over 10 years.
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Video

About Us

2 minutes
We are New York City’s premier provider of HVAC service, maintenance, and construction, as well as energy solutions.
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Blog

Preparing Your Commercial HVAC System for the Summer

6 minutes
As the temperatures begin to rise and summer approaches, it is important to ensure your commercial HVAC system is ready for the season. Properly caring for your system now can help you avoid costly repair bills down the line.
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Featured Project

Basketball City

Basketball City is a 70,000 sq. ft. “state-of-the-art” Sports & Entertainment facility, Donnelly Mechanical helped identify ongoing issues with their HVAC equipment that included poor performance and premature equipment failure.
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