Expert installation and around-the-clock emergency services in central and northern New Jersey.
John Duffy Energy Services is a family-owned and operated business that’s been around since 1891. Having served Newark and the surrounding area for a long time, we have built a reputation for providing excellent products and dependable customer service.
HVAC Commercial HVAC
A top commercial air conditioning & heating contractor in northern and central New Jersey.
Our commercial HVAC services will keep your place of business cool during the summer and warm during the winter. We’re a company with a reputation built on always putting our customers’ needs first, offering superior products, and providing unbeatable service.
We stand behind our work with pride. We’re confident that if you select John Duffy Energy Services, you’ll make a decision you’ll never regret. Whether you need commercial air conditioning services or a commercial heating contractor, John Duffy Energy Services has the experience and expertise to provide the right solution.
Standby Generators
Get a standby generator to safeguard your business
Given that recent years have witnessed several storms, a number of businesses have turned to us for installing backup generators. These units take little time to start once you lose power, which enables your business to continue functioning seamlessly.
We provide generators for all small, mid-sized, and large businesses alike, and you get to choose from varied kilowatt output capacities as well as complete and partial backup. You also benefit from our 100% satisfaction guarantee and industry-leading manufacturer warranties.
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Commercial Repairs and Installations
John Duffy Energy Services makes customer satisfaction a top priority. Whether you’re interested in getting a new water heater or thermostat installed or need repair work done on your air conditioning unit, we offer energy solutions for businesses across northern and central New Jersey. With us, you can be sure we’ll put the required effort into designing and installing a system that’s perfectly suited to meet your business needs.