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HVAC in New Castle County

Heating and Cooling Services for New Castle County, DE

Hillside Oil Heating & Cooling is a full-service home heating oil and HVAC company proudly serving homeowners and businesses throughout New Castle County, DE. Whether you need heating oil delivery, furnace repair, air conditioning installation, or maintenance, we’re committed to keeping your home or business comfortable year-round.

Comprehensive Heating & Cooling Solutions

Heating Oil Delivery

We provide dependable heating oil delivery with automatic refill options, ensuring you never run out. Our oil heating system services include installing, maintaining, and repairing oil-fired furnaces, boilers, and burners to keep your home warm and efficient.

Learn more about our Heating Oil Delivery Services.

Heating Services

Our team specializes in gas, propane, and electric heating systems, including furnaces, boilers, heat pumps, and ductless mini-splits. Whether you need a new installation, routine maintenance, or emergency repair, we have the expertise to keep your system running smoothly.

Learn more about our Heating Services.

Cooling Services

We offer installation, repair, and maintenance for central air conditioning and ductless mini-split systems. Improve indoor air quality with air purifiers, humidifiers, dehumidifiers, and high-efficiency filtration systems for a healthier home.

Learn more about our Cooling Services.

Service Plans

We offer comprehensive service plans to keep your heating and cooling systems running efficiently. Plans include HVAC maintenance, automatic oil delivery, budget-friendly billing, and an oil tank warranty program, providing peace of mind and cost savings.

Learn more about our Service Plans.

Comfort Upgrades

Keeping your paws comfy all year involves more than heating and cooling products and services.

  • Smart Device Control. Hillside sells and installs Smart thermostats, allowing remote temperature control from your smartphone or computer for convenient scheduling.
  • Tankless Water Heaters. Hillside installs tankless water heaters, providing endless hot water, improved energy efficiency, and space-saving convenience.
Commercial Fuel Services

Hillside supplies diesel fuel and heating oil to businesses across Delaware, Maryland, and Pennsylvania. As the only oil company in New Castle County with a top-loading rack system, we provide competitive market pricing and 24/7 fueling at 40 Brookhill Drive, Newark, DE.

Learn more about our Commercial Fuel Services.

Call us to schedule any of our services at 302-738-4144 (DE&PA) or 410-398-2146 (MD).

REQUEST SERVICE

This contact form does not substitute for a service call request. Please call our office 302-738-4144 or 410-398-2146. Thank You.

Join Over 5000 Customers Who Trust Hillside For

THE TRUSTED COMFORT EXPERTS OF DE, MD, & PA

Hillside Awards

WE LOVE OUR CUSTOMERS

All of our work is guided by three generations of family attitudes and values – respect, loyalty, integrity, accountability, honesty, kindness. We pride ourselves on building excellent relationships with our customers, some of whom we have served for decades, and then gone on to serve their children for decades. Above all, we know what it’s like to be a customer and how we’d like to be treated.

That’s why we’re so honored to have received thousands of glowing ratings, reviews, recommendations, and testimonials from our heating and cooling customers. It means the care we put into our work shows through, and that we truly are doing customer service right.

ExcellentFacebook star 1Facebook star 2Facebook star 3Facebook star 4Facebook star 54.9225 reviews
4.9Facebook star 1Facebook star 2Facebook star 3Facebook star 4Facebook star 5
Excellent225 reviews
Posted on Facebook Facebook
Scott Finnegan profile picture
Scott Finnegan
October 6, 2026
negativenot recommends
2 yrs and counting since I reached out about one of their dipshit 'techs' verbally and physically assaulting me in a gym lobby and so far crickets, says a lot about the company.......
Posted on Facebook Facebook
Joe Roach profile picture
Joe Roach
January 29, 2025
positiverecommends
Hillside is great for both repairs and major system replacements. Reasonable prices and great service!
Posted on Facebook Facebook
Lauren Riebel profile picture
Lauren Riebel
November 26, 2024
positiverecommends
This was our first time using this company & we will absolutely be using them again. Our technician was extremely knowledgeable & friendly. He really took the time to explain everything to us & didn’t try to sell us something new. I would 100% recommend this company to anybody in the area for any of your heating and cooling needs.
ExcellentGoogle star 1Google star 2Google star 3Google star 4Google star 54.8255 reviews
4.8Google star 1Google star 2Google star 3Google star 4Google star 5
Excellent255 reviews
Posted on Google Google
Matthew Burlew profile picture
Matthew Burlew
November 5, 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
Ryan, Shawn and Olaf at Hillside were an excellent team. They replaced our HVAC system. They did fantastic work and spent sufficient time making sure we were comfortable with the new system. Thank you
Posted on Google Google
James Hunt profile picture
James Hunt
November 4, 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
Had a separate quote from a different company for 8k worth of fixes. Mike from Hillside came out and gave me his expertise and retested my system. He was honest with me and gave me knowledge to help me make the correct decision. Mike saved me a boatload of money. Recommend Hillside for any type of heating and cooling work!
Posted on Google Google
Kenneth Wohner profile picture
Kenneth Wohner
October 20, 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
Tom was on time and did a fantastic job. I am very pleased with Hillside.
Hillside Oil Heating & Cooling proudly serves New Castle County, DE, Chester County, PA, and Cecil County, MD with trusted heating oil delivery, HVAC service, and expert home comfort solutions.

Proudly Serving New Castle County, DE, Cecil County, MD and Southern Chester County, PA.

Call Hillside Oil Heating & Cooling at 302-738-4144 for DE & PA or 410-398-2146 for MD

302-738-4144 (DE & PA) 410-398-2146 (MD)

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