About Us

Hart & Iliff was founded in 1889 by two brothers-in-law, Nathan H. Hart and Louis S. Iliff. The company initially sold feed and grain, coal and building materials. Eventually Hart & Iliff branched out into selling heating oil and installing/servicing heating and air conditioning equipment. After a number of years operating as partners, Louis Iliff bought out Nathan Hart. The business was run by the Iliff family continually until 1971 when it was purchased by Albert & Florence Brand.

Our Personal Guarantee

For over 130 years we have built our business by consistently doing what is right for our customers. We guarantee your satisfaction with all of our products and services.

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Who We Serve

Hart & Iliff has provided top quality products and services to the residents of Sussex, Northern Morris and Northern Warren Counties since 1889. Our products and services include:

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What Our Clients Are Saying

"Your response to a service call has been outstanding. Your technicians are first class and know their trade."

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Frequently Asked Questions

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What Our Customers are Saying

These are unsolicited comments received from Hart & Iliff customers.

"The installation has exceeded my expectations and I am grateful for your recommendation. The installation is not only functional but has an aesthetic quality, which friends of mine have admired. The service people who installed the furnace exemplified professionalism, solid work ethic, and excellent customer care. They spent a bit of extra time explaining furnace operation and their work. The extra minutes they spent with me made initial operation and programming much simple and probably eliminated a service call. As a result of your excellent service, I am and will be a very loyal Hart & Iliff customer. I recommend your company to others on a regular basis."

"Your generosity means more than you know, and will touch more lives than you know. It’s rare these days to find a business so responsive to its customers’ needs, and so invested in the community it serves. The warmth and positive attitude everyone on the Hart & Iliff staff exudes make working with you, even under unfortunate circumstances a true pleasure. I offer my deep gratitude to you and your colleagues."

"I would like to express my gratitude to your company for sending such a competent service technician to service my heating unit. His work is beyond the norm. He serviced my unit completely as it should have been. He was thorough, neat and clean. He likes his job, he speaks very highly of the Hart & Iliff Company and its members. Again, thank you so much for employing such a fine man. Its always nice to be able to praise someone who has earned it."