Water Heaters

Water heater installation or repair in Essex, Union, Middlesex, Morris and Hudson county, NJ

There are many benefits to choosing John Duffy Energy Services for all of your water heater needs in central and northern NJ:

  • We offer a full range of services, including not only sales but also installation and repair.
  • John Duffy Energy Services only uses water heaters with the best parts and equipment. We proudly carry Bock products, known for their excellence and durability.
  • We are happy to offer oil-fired water heater coverage, allowing you more options in flexibility and reliability to meet your water heating needs.

Bock Oil-Fired Water Heater

Recognized as the leader in oil-fired water heaters, Bock provides quality in construction, efficiency in performance and durability in operation. The company’s patented, multi-finned Turboflue® transfers more than twice as much heat to the domestic water as its competitors, minimizing heat loss up the chimney flue. What does this mean for you? A hotter, “no-wait” shower, energy and water conservation, and lower bills.


  • CGlass® –  Durable and exclusive porcelain enamel glass is used to line all tanks and Turboflues.
  • Built to last – Hand-crafted from heavy-gauge steel. Longer life equals a higher “return on investment.”
  • Double pressure tested – Only Bock pressure-tests its tanks twice.
  • Fully welded tank skirt – Prevents noxious flue gases from escaping between the tank and jacket.
  • hot-water-heater-bock
    Turboflue® – Bock’s patented design is the industry’s most advanced and efficient heat exchanger. It heats water faster and uses less fuel, which reduces energy costs.
    The DynaClean™ II system protects against lime and sediment buildup

    AO Smith ProMax® Gas Water Heater

    The ProMax family offers a wide range of water heating solutions — from models that help you qualify for gas utility rebates to high recovery models ideal for large families with high demand for hot water. All ProMax water heaters are engineered to help lower your energy bills and provide exceptional reliability.


  • Features C3 Technology™ that protects against accidental ignition of flammable vapors.
  • “Environmentally-Friendly” Green Choice® gas burner reduces NOx emissions by 33% compared to standard burners.
  • Easy to install – dimensions similar to a standard 50-gallon power vent water heater
  • Contact us today for more information on a water heater installation, repair, or maintenance. John Duffy, serving Newark, Elizabeth, Jersey City, Edison, East Orange and surrounding towns in Essex, Union, Middlesex, Morris and Hudson county, NJ.

    Office Address
    465 Mulberry St Newark NJ 07114-2736

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