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    Get a FREE NEST
    Wi-Fi Thermostat

    Wi-Fi Nest Learning Thermostat

    A $450.00 value!

    with the purchase of any new Home Heating System.*

    *AC/Heating System must be installed by John Duffy Energy Services Installation Experts. Good for residential properties only and some restrictions apply. Not valid on prior quotes.

    Office Address
    465 Mulberry St Newark NJ 07114-2736

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