About Hentkowski Inc.

Hentkowski Inc. is dedicated to providing the best heating, air conditioning and electrical services and products to our customers in the Delaware, Southeastern Pennsylvania and Northeastern Maryland areas since 1968.

Readers' Choice '13 winner At Hentkowski Inc. we have a lot to be proud of. We are proud of becoming the 1st Carrier Factory Authorized Dealer in Delaware, our NATE Certified Technicians, our NATE Quality Circle Contractor Status, and the dedicated service we have provided our customers in the Delaware, Southeastern Pennsylvania and Northeastern Maryland areas since 1968 Carrier is proud to present the 2015 President's Award to Hentkowski Inc. for a fifth time. We were also President's Award winners in 2009 2011, 2012 and 2013. Thank you to our customers for this Quality driven Award from Carrier.

We have been providing residential and commercial customers alike with complete, sales, service and installation of high-quality heating and cooling systems from Carrier and other manufacturers. And we also provide repairs on all makes and models.

When it comes to your family or workplace you want dependable heating and cooling systems that provide you with value as well as comfort. Thanks to the "Key to Comfort" staff here at Hentkowski Inc. you can expect just that.

Hentkowski Inc. is a licensed, bonded, and insured HVAC, Heating, AC, and Electrician contractor in all the municipalities that we work in.

We invite your questions about our company.

Here is some information about us:


    We are Licensed, Insured, and Bonded:

    HVAC Licenses:


    • New Castle County, DE
    • City of Wilmington, DE
    • City of Newark, DE
    • City of New Castle, DE
    • Town of Newport, DE
    • Town of Elsmere, DE

    Home Improvement Contractor PA001898 | Various townships and boroughs

    State of Maryland:
    • Master HVAC
    • Cecil County

    Electrical Licenses:
    • State of Delaware

    Business Licenses:
    • State of Delaware
    • State of Maryland


    We are active members of the community and trade groups:

    • Carrier Dealer Alliance
    • Servassure Dealer
    • Mitsubishi Diamond Dealer
    • Better Business Bureau of Delaware
    • Plumbing Heating Cooling Contractors
    • Various Service, Educational & Charitable Organizations


    We want to serve you:

    It is our highest concern that your job is put in professionally, safely, neatly and according to code and the manufacturer's specifications. All of our employees take advantage of continuing education programs offered by manufacturers, organizations and local schools. We give free written estimates for all installation jobs and service repairs upon your request. We handle all permits and inspections on your job with the necessary agency. We file paperwork for applicable Rebates and Extended Warranties. As an added service we offer Preventative Maintenance Agreements for all our customers. We install and service your new or existing comfort system as if it were in our own home.


    We are a Family Business:

    Founded in January 1968, by John W. Hentkowski the business now employees sons of John Jr., Kym, Stephen, daughter Barbara and son-in-law Brian. John is active in the daily operation of the business. We invite you to visit our office so you can meet us and see the equipment we offer in our showroom.


    We are dedicated to the environment:

    As a "Green Company" we recycle all paper, cardboard, metal, plastic, waste oil, mercury and refrigerants etc. Our mechanics are EPA certified to handle refrigerants. We offer equipment that uses Ozone Friendly refrigerants. We also offer precast air conditioner pads made from recycled materials.