Hillside Oil Heating & Cooling
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About Hillside Oil Heating & Cooling
Hillside Oil Heating & Cooling has kept Delaware, Maryland, and Pennsylvania homeowners comfortable for over 70 years, earning a 4.7-star rating across 224 reviews. Based in Newark, Delaware, this full-service HVAC contractor serves New Castle County and Cecil County while handling heating oil delivery, boiler and furnace repair, central air installation, and ductless mini-split systems for both residential and commercial clients.
What distinguishes Hillside is their commitment to transparency and responsive service. Their automatic heating oil delivery program includes budget billing, and they partner with LIHEAP to assist households facing energy emergencies. The company also handles natural gas conversions and installs smart thermostats for enhanced climate control, offering commercial fuel services for businesses needing ultra low sulfur diesel.
Homeowners consistently praise named technicians who arrive prepared and communicative. When Justin responded to an emergency call after another contractor failed to show, he calmly assessed the situation and restored heat while explaining each step to the homeowner. For LIHEAP-assisted customers facing urgent situations, staff members like Kasey and Sherri have navigated complex assistance paperwork to ensure timely service.
What Customers Say
Of four detailed reviews examined, all five-star ratings highlight specific technicians by name, with customers emphasizing transparency, clear communication, and respectful service. Multiple reviewers note same-day response capabilities and appreciation for speaking directly with actual service personnel rather than automated systems.
Working Hours
| Sunday | Closed |
| Monday | 7:30 AM–4 PM |
| Tuesday | 7:30 AM–4 PM |
| Wednesday | 7:30 AM–4 PM |
| ThursdayToday | 7:30 AM–4 PM |
| Friday | Closed |
| Saturday | Closed |
Services
Heating System Installation & Repair
Complete furnace and boiler installation, repair, and tune-up services for oil, natural gas, and electric heating systems.
Air Conditioning Services
Central AC installation, replacement, repair, and maintenance for all major brands plus ductless mini-split systems.
Heating Oil Delivery
Automatic and call-in heating oil delivery with budget billing plans and tank monitoring programs.
Tankless Water Heaters
Installation of tankless water heating systems for endless hot water supply and energy efficiency.
Smart Thermostat Installation
Smart thermostat setup for remote climate control and optimized energy usage.
Commercial Fuel Services
Ultra low sulfur diesel and commercial fuel tank sales, leasing, and delivery for businesses.
Natural Gas Conversion
Conversion services for homeowners switching from oil heating to natural gas systems.