HEAT PUMPS

Heat Pump Installation, Repair, and Maintenance In DE, PA, & MD

THE ALL-IN-ONE HEATING & COOLING SYSTEM

For over 70 years, Hillside has been the trusted, local expert for heat pump installation, repair, and maintenance services in Delaware, Pennsylvania, and Maryland. 

We offer energy-efficient heat pump systems engineered for exceptional performance and durability. Our selection includes and services top brands such as Armstrong Air, Thermo Pride, Peerless, Mitsubishi, Rinnai, and other leading ductless systems. 

Hillside’s technicians have the training, certifications, and knowledge to install, maintain and repair these HVAC systems. Whether you need installation, routine maintenance, or emergency repairs, you can trust us for all of your heat pump needs.

Top Heat Pump Brands of 2026: A Buyer’s Guide

For a FREE QUOTE, call us at 302-738-4144 (DE&PA) or 410-398-2146 (MD). We’ll give you an HONEST ESTIMATE for any heat pump installation, repair, or maintenance service.  

Heat Pump Services

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
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)

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 55.0223 reviews
5.0Facebook star 1Facebook star 2Facebook star 3Facebook star 4Facebook star 5
Excellent223 reviews
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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.
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Wendy Lewis profile picture
Wendy Lewis
July 25, 2024
positiverecommends
My technician, Michael Fields II, assures me that all is well with my systems. I trust his assessment so feel confident that we will stay cool this summer and be warm this winter. He was polite, friendly, considerate, and EXTREEMLY popular with my pets. Bodhi and Baxter, one of the 2 dogs and one of the 2 cats, were very happy to follow him everywhere in the house. All 4 pets waited for him each time he went outside and made sure to get pets upon his return. I love that Michael came back this year and continues to take care of my systems as his father did before him. Very cool! Many thanks, and the crew looks forward to his return!
ExcellentGoogle star 1Google star 2Google star 3Google star 4Google star 54.8249 reviews
4.8Google star 1Google star 2Google star 3Google star 4Google star 5
Excellent249 reviews
Posted on Google Google
Jessica Casson profile picture
Jessica Casson
September 28, 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
Great team - very knowledgeable, efficient, and completely respectful of the space. Really appreciate everything you did to get us back up and running!
Posted on Google Google
Stephanie Butcher profile picture
Stephanie Butcher
September 28, 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
The 4 hour appointment window was 8 to 12. Michael was at the door at 8. Right to work as I was told and knew what to do with the system. Thank you for getting us ready for winter.
Posted on Google Google
Jen Billips profile picture
Jen Billips
September 28, 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
We had our first service visit today for a tune-up on our oil furnace, and we were very impressed. The technician was knowledgeable, thorough, and took the time to explain what he was seeing rather than just completing the service and leaving. He confirmed that our system is running well and is very efficient, while also pointing out an area that may need attention in the future and explaining why. It was especially reassuring to work with someone who clearly has experience with oil heating systems. We had used another company in the past and were looking for a company with stronger oil-furnace expertise. Based on this first experience, we feel like we found the right one.
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