Air conditioning, heating systems and more

John Duffy Energy Services is one of central and northern New Jersey’s leading names in energy, home heating, fueling, and HVAC services. As such, we get a lot of questions, including air conditioning questions, heating questions, general energy questions, HVAC questions, and more. Here are some of the more common ones. If your question isn’t listed here, don’t hesitate to contact John Duffy Energy Services today! Maybe we’ll add it to the FAQ page.

Contact Us

Office Address
465 Mulberry St Newark NJ 07114-2736

Mailing Address
P.O. Box 5610, Newark, NJ 07105