Business Details
50+ Years
experience
Emergency
services
Trusted HVAC Services in Delaware, Maryland, and Pennsylvania
Hillside Heating & Cooling has been a trusted provider of heating, air conditioning, and fuel services for over 70 years, serving residential and commercial customers across Delaware, Maryland, and Pennsylvania. Founded as a family-owned business, we prioritize exceptional customer service, treating every client with the respect and care we would expect ourselves. Our team of certified professionals specializes in oil delivery, HVAC installation and repair, ductless systems, and commercial fuel solutions, backed by industry-leading warranties and maintenance plans.With a commitment to innovation, we offer energy-efficient products, smart thermostats, and tankless water heaters to meet modern comfort needs. Recognized with awards like the BBB International Torch Award for Ethics and the Rush Memorial Award for Outstanding Family-Owned Business, we combine decades of expertise with a dedication to community service, supporting local charities and organizations focused on disabilities, youth sports, and the arts. Real people answer your calls, and our fleet of modern trucks ensures reliable, timely service year-round.
Services
Oil Delivery
HVAC Installation
AC Repair
Commercial Fuels
Maintenance Plans
Tankless Water Heaters
Ductless Systems
Emergency Services
Smart Thermostats
Generator Fueling
Details
- Year established: 1951
Highlights and features
- Over 70 years of industry expertise with a family-owned commitment to service.
- Certified technicians providing fast, reliable HVAC repairs and installations.
- Award-winning ethics and community involvement recognized by BBB and local organizations.
- 24/7 emergency service for urgent heating and cooling needs.
- Transparent pricing with budget billing and special financing options.
Associations and certifications
- Better Business Bureau (BBB)
What people say
Exceptional customer service
Prompt emergency response
Competitive fuel prices
Professional technicians
Long-term reliability
Services
HVAC Installation
Hillside provides expert installation of heating, air conditioning, and ductless mini-split systems for residential and commercial properties. Our technicians are trained in all major brands, ensuring efficient, long-lasting solutions tailored to your space. With 70+ years of experience, we deliver precise installations backed by industry-leading warranties and energy-efficient technology.
Emergency AC Repair
Our certified technicians offer rapid response for urgent cooling system failures, typically arriving within hours of your call. Available 24/7 year-round, we diagnose and repair all major AC brands to restore comfort quickly. Emergency service includes priority scheduling and no overtime charges for after-hours visits.
Heating Oil Delivery
Hillside delivers high-quality heating oil with automatic or on-demand scheduling options. Our fleet ensures reliable winter service across DE, MD, and PA, with budget billing available to spread costs evenly. Customers receive competitive pricing and transparent tracking of fuel levels and usage patterns.
Commercial Fueling
We supply ultra-low sulfur diesel (ULSD) and other fuels for construction, agriculture, and industrial operations. Our 24/7 accessible fueling island in Newark, DE offers competitive pricing, while bulk delivery options serve generators and fleet operations. Custom tank leasing and on-site fueling solutions optimize efficiency for business clients.
Maintenance Plans
Our maintenance plans include annual tune-ups, discounted parts, and priority service for HVAC systems. The Premium Plan offers 25% service discounts, free preventative maintenance, and emergency response within 24 hours. Contracts transfer with equipment ownership, providing long-term value and system longevity.
Questions
What areas do you serve?
Hillside serves New Castle County, DE; Cecil County, MD; and Southern Chester County, PA for all heating, cooling, and fuel needs.
Do you offer emergency HVAC service?
Yes, we provide 24/7 emergency heating and cooling repairs with technician arrival typically within hours of your call.
What payment options are available?
We accept budget billing, credit/debit cards, checks, and cash-on-delivery payments for all services and fuel deliveries.
Are financing options available?
Yes, we offer special financing for HVAC installations and equipment upgrades to qualified customers.
How can I schedule service?
Call 302-738-4144 (DE/PA) or 410-398-2146 (MD) during business hours or request service online for non-emergency appointments.
Reviews (2)
Sarah Mullins
Sep 22, 2017
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Hillside is the best! When we needed them They were here! Will definitely recommend this place to everyone I know! Thank you hillside for always.
Dorothy Coulter
May 18, 2017
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After a power surge and a power outage I found out it had ruined my heater. Since both my heater and AC were close to 20 years old I contacted.
