The best selection of furnaces in Essex, Union, Middlesex, Morris and Hudson county, NJ

When you buy from John Duffy Energy Services, you’re buying from a company that’s been keeping customers happy ever since 1891. You’re buying from a company that doesn’t only sell heating equipment, doesn’t merely offer furnace repair and furnace replacement, but provides peace of mind to countless households throughout the New Jersey area:

  • great products
  • installation
  • maintenance
  • repair services

Trane Natural Gas and Oil Furnaces

The Trane XC95m natural gas modulating furnace provides ultimate comfort and ultra-high efficiency for big energy savings.


  • Up to 97.3% AFUE (Annual Fuel Utilization Efficiency).
  • ComfortLink™ II communicating control technology allows the XC95m to constantly calibrate itself for optimal performance year after year.
  • Variable-speed blower motor adjusts speed to provide a consistent flow of warm, comfortable air with quiet operation.
  • The Trane XV80 high efficiency oil furnace provides two stages of comfort all winter long.

  • Up to 85% AFUE (Annual Fuel Utilization Efficiency).
  • Variable-speed blower motor.
  • Clean–burning, environmentally-friendly.
  • trane-xc95m

    Thermo Pride Furnaces

    The Thermo Pride Premiere’s advantages include:

  • Large, easily accessible inspection ports
  • Front or rear flue option
  • Sound and vibration absorbing blower mounts
  • 22-gauge panel cabinet
  • 10-year “Peace of Mind Plus” Warranty
  • Hallmark Warm Air Furnaces

    Since it first went into production in 1939, the Hallmark furnace has offered the finest quality and engineering innovations available in a furnace.


  • Efficiencies from 80% AFUE to 84% AFUE (Annual Fuel Utilization Efficiency)
  • Front and rear flue
  • Limited lifetime warranty
  • hallmark-oil-heater
    Everything we offer is backed with John Duffy Energy Services’ peerless service plans and around-the-clock emergency maintenance options. For more information on our furnace services, or on furnace prices, contact John Duffy Energy Services today! 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