heating installation, repair, and maintenance Diesel and gasoline on-site fleet fueling Residential heating oil and HVAC services whole house generators

Heating Oil, Heating & Air Conditioning Services, and Motor Fuels to Homes and Businesses in Northern and Central New Jersey

John Duffy Energy Services has been a family-owned and operated company since its 1891 inception. Its history spans four generations, but what remains consistent is the people-first attitude and customer-driven approach to sales and service that make the company tick.

Whether you're looking for residential or commercial services, you need heating oil or heating / air conditioning systems, or your business needs motor fuels, for the best service and quality in Essex and Union counties, and throughout northern and central New Jersey, contact us.

John Duffy Energy Services, serving Newark, Elizabeth, Jersey City, Edison, East Orange, and surrounding towns in Essex, Union, Middlesex, Morris and Hudson county, NJ.

Up To $1,700 In Rebates!

SAVE MONEY by installing a High Efficency heating & air conditioning system. UP TO $1,700 IN REBATES!

Service Contract Offer

Extend the life of your equipment with guaranteed repairs for one full year, free of charge!

Motor Fuel Tank Loans

John Duffy Energy Services provides the best in tank equipment loans for your business needs....

Heating & A/C

First-class products with
expert installation.
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Residential Generators

Get your power restored
in 10 seconds!
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Fleet Fueling

Lower your costs and increase productivity by cutting fueling time.
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Commercial Fuels

The best heating oil and gas
prices for your building.
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Enjoy top-notch service

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