From Furniture to Fuel, to the Future
We have been in business for more than 100 years and our experience extends across different fields. What is consistent is our company’s devotion to providing excellent home and commercial products along with an unimpeachable brand of customer service.
Do you need more information about John Duffy Energy Services?
Four generations of family ownership
John Duffy Energy Services has been a family-owned and operated company since its inception in 1891. While our history spans four generations, there has been no change in our people-first attitude and customer-driven approach to sales and service, because this is what makes the company tick. Whether you’re a residential or a commercial customer, looking for HVAC solutions or fleet fueling options, John Duffy Energy Services has staff members who are eager and equipped to provide you with peerless service and products of the highest quality.
They Build Ideas Driven by the Future
HVAC Sales Manager
Words of Appreciation, and More
Our mission has been the same since John Duffy Energy Services first saw the light of day. We aim to provide customers with highly reliable, friendly, and professional service. For us, your complete satisfaction with our products and services is paramount, which is why it’s immensely gratifying when our clients from across New Jersey submit testimonials and endorsements. We treasure these like we would personal thank-you notes, and we display them here to showcase the fruits of our customer-driven approach.
I had a problem with my heating system (no heat) reached out to oil companies and plumbers no one could get my boiler working. Some couldn’t come out within a day or two. I called Duffy Energy (Ted) he sent out a service tech immediately found the problem and fixed it. I highly recommend Duffy Energy to anyone in need of heating or air conditioning repair. Very prompt, friendly and knowledgeable. In the past I needed to wait for parts from other companies but Duffy Energy has a large inventory on truck. I couldn’t be any happier.Rose Masters
In the dynamic landscape of HVAC and energy, many companies come and go, but John Duffy Energy Services’ legacy represents enduring quality, reliability, and innovation. Their firm’s longevity for more than a century is no accident. It speaks to their unwavering commitment to excellence, adaptability in changing times, and cultivating trust with countless customers, including my family. Their deep-rooted industry knowledge and forward-thinking approach have made them a service provider and a true partner in my family’s comfort and energy solutions. Here’s to Duffy —a beacon of reliability and expertise for over 100 years!Doug Brown
Finding a reputable company is hard these days. Not only is John Duffy Energy Services reputable, they are honest, trustworthy and perform their work to the highest standard. They are a quality, family run operation, that puts their customers first. I have been using these guys for over 10 years and anytime I call on them, they show up with a smile and get the job done right.Craig Hansen