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Your Trusted HVAC Partner in Newton, NJ
Hart & Iliff has been dedicated to providing exceptional heating, ventilation, and air conditioning services since 1889. Our commitment to personalized attention ensures that each customer receives tailored solutions for their home comfort needs. With a team of certified New Jersey Master HVACR Technicians, we deliver expert installation, maintenance, and repair services for all types of heating and cooling systems. Our 24/7 emergency service guarantees prompt assistance whenever needed, reflecting our core value of customer satisfaction. We pride ourselves on innovative offerings like the Perfect Installation System, which ensures precise equipment sizing and superior workmanship. Backed by over 130 years of experience, we combine traditional values with advanced technologies such as Ultrablend Heating Oil and solar thermal systems.

Our ISO-certified Roth safety tanks and partnerships with leading manufacturers like Buderus and Peerless demonstrate our dedication to quality. As a locally owned business serving Northwest New Jersey, we maintain deep community ties while adhering to strict environmental and safety standards. Our comprehensive service area covers Sussex, Northern Morris, and Northern Warren Counties, where we continue to uphold the trust earned over three centuries. Through continuous training and investment in cutting-edge solutions, we ensure our technicians remain at the forefront of HVAC technology while maintaining the personal service that has defined our company since its founding.
Services
HVAC Installation Radiant Heat Systems Heating Oil Delivery Solar Thermal Systems Boiler Repair Air Conditioning Service Fuel Tank Installation Emergency Maintenance System Diagnostics Energy Efficiency Solutions
Highlights and features
  • We offer over 130 years of local HVAC expertise since 1889
  • Our certified technicians provide 24/7 emergency service
  • We use advanced Ultrablend Heating Oil technology for cleaner combustion
  • Our Perfect Installation System ensures precise equipment sizing and quality
  • We maintain Master HVACR Contractor License #19HC00796300
Associations and certifications
  • ISO 9000
What people say
Courteous service technician Professionalism Exceeded expectations Community investment Sympathetic approach
Services
HVAC Installation
Our certified technicians install heating, ventilation, and air conditioning systems using the 8-step Perfect Installation Process. We ensure proper BTU calculations, code compliance, and personalized equipment selection. The service includes permitting, professional installation with quality materials, and final code inspections to guarantee optimal performance and customer satisfaction.
Radiant Heat Systems
We distribute and install Roth radiant heat systems that provide efficient, quiet home heating through hydronic tubing. This European technology offers energy savings of 20-40% while eliminating drafts and providing even temperature distribution. Our experts handle complete system design and installation for residential properties.
Heating Oil Delivery
We deliver premium heating oil with advanced additive technology that prevents sludge buildup and improves system efficiency. Our service includes tank monitoring, emergency deliveries, and environmentally responsible fuel management for residential customers throughout Northwest New Jersey.
Solar Thermal Systems
Our solar domestic hot water systems combine solar panels with efficient storage tanks to reduce energy costs year-round. Professional installation includes system design, component selection, and integration with existing heating systems to maximize energy savings and environmental benefits.
Emergency Maintenance
We provide round-the-clock emergency HVAC service for system failures and urgent heating/cooling needs. Our trained technicians respond promptly to service calls, with equipment diagnostics and repair capabilities for all major brands and system types.
Questions
What HVAC services do you offer?
We provide complete HVAC solutions including installation, maintenance, and repair of heating and cooling systems for residential properties.
Do you offer emergency HVAC service?
Yes, we provide 24/7 emergency service for urgent heating and air conditioning repairs.
What areas do you serve?
We serve Sussex County, Northern Morris County, and Northern Warren County in New Jersey.
Do you offer heating oil delivery?
Yes, we deliver premium heating oil with advanced additive technology for improved system efficiency and cleaner combustion.
What makes your installation process different?
Our Perfect Installation System uses precise BTU calculations and quality materials to ensure optimal system performance and longevity.
Do you install solar heating systems?
Yes, we install solar thermal systems that provide energy-efficient domestic hot water solutions for homes.
Reviews (7)
Jerry Head
Sep 19, 2021 Report
We got 4 quotes on a new heating system and they weren't the highest or lowest but we chose them for their knowledge. We were given 3 quotes on different systems with detail on differences in the systems, no pressure to choose one over another as with other companies. Clearly professional and very knowledgeable, we had full confidence in what they were going to do. Install day was great, very nice crew, all work areas were left very clean. We were given a detailed walkthrough of the system, they answered all questions we had. The company guarantees their work. Look no further if you need any type of heating or cooling systems work.
Ken Roberts
Sep 16, 2021 Report
I have been a customer of Hart & Iliff since 1973 when I moved to the County. In addition to normal oil delivery and yearly maintenance, they have always been there promptly during the times I needed emergency service no matter what the weather. Their technicians have always been knowledgeable and and professional and I have seen a few in my almost 50 years using the company. Hart and Iliff has my highest recommendation.
Mark J.
Jun 11, 2021 Report
I have been a customer since 2016. They maintain my furnace, air conditioning system, and provide me with home heating oil. I have also had repairs done on my furnace in the middle of the winter, with one call, the issue was fixed the right way. Everyone from the first phone call to the service visit are professional and kind. I would never think of going anywhere else. I highly recommend them for: quality of work, piece of mind, exceptional value, and consistent results.
Jennifer Balogh
Apr 24, 2021 Report
As a single mother buying a home, it is a relief to have businesses you can trust and rely on to be there. I have had 1/2 a dozen emergency visits for my old heating system, and not only were they to the rescue quickly {within an hour each time!} they were personable and knowledgeable and empathetic. The "girls" running the office and paperwork are equally professional, helpful and kind. Finally, I was able to speak at length to the owner when contemplating pulling and replacing my underground tank. I am in excellent hands, feels like family and will never leave Hart and Iliff.
Lois Verbeek
Feb 28, 2021 Report
I have been using Hart and Iliff for almost 40 years since I moved into my home in Byram Township in 1980. They deliver oil, maintain and clean my furnace annually and always are only a phone call away when I need repair. 15 years ago they installed two new Roth oil tanks in my basement. They are very dependable and reliable and I would never use any other oil company. Lois V.
Catherine Wille
Jan 27, 2021 Report
I have been using Hart and Iliff for the past 13 years. They have provided excellent service. Their field workers are extremely knowledgeable, personable and efficient. They have earned my trust over the past 13 years because they are so reliable, great communicators and are willing to work with you as a customer! I highly recommend this upstanding business!
Patricia Pruser
Jan 17, 2021 Report
Hart and Iliff has been our oil supplier for over 20 years and we couldn't be more satisfied with their professional service. They NEVER left us cold when the furnace needed repair, and they are on top of deliveries when a snow or ice storm is on the horizon. THANK-YOU very very much! Sincerely, Patricia Pruser Services: Cleaning, Heating system maintenance