$1000 OFF A NEW A/C AND FURNACE COMBO INSTALLATION

For a limited time, save $1000 on a new furnace and new A/C, sales, and installation!

Special Financing Available.

Expires 10/7/2026.

Cannot be combined with any other offers and discounts.

$500 OFF A NEW DUCTLESS HVAC & FURNACE COMBO INSTALLATION

For a limited time, save $500 on new furnace and ductless mini-split sales and installation!

Special Financing Available.

Expires 10/7/2026.

Cannot be combined with any other offers and discounts.

FREE 12-YEAR EXTENDED WARRANTY

12-year parts and compressor warranty with the purchase of a Mitsubishi Ductless Mini-split System installed by a Diamond Contractor (Approx. $1000 Value) and registered within 90 days of installation.

Expires 10/7/2026.

Cannot be combined with any other offers and discounts.

10¢ OFF PER GALLON OF HEATING OIL

FILL YOUR TANK NOW AND SAVE!
For a limited time, get 10¢ of your heating oil bill. (C.O.D. orders only).

Expires 8/30/26.

Offer valid for new customers or previous customers who have not purchased from Hillside in the last 24 months. Valid for one delivery location per customer. Cannot be combined with any other offers and discounts. Cannot be combined with any other offers and discounts.

SCHEDULE A FREE ESTIMATE TODAY!

Call Hillside Heating and Cooling to schedule a FREE estimate at 302-738-4144 or 410-398-2146

Join Over 5000 Customers Who Trust Hillside For

Modern Energy-Efficient Products
Exceptional Customer Service
Fast and Flexible Scheduling
Up-Front and Fair Pricing
Industry Leading Warranties
Excellent Service and Maintenance Plans
Courteous and Professional Technicians
Over 70 Years of Industry Expertise

THE TRUSTED COMFORT EXPERTS OF DE, MD, & PA

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.

       
 Excellent5.0223 reviews
 5.0
 Excellent223 reviews
  Write a review 
 
 
 
      Posted on Facebook  
   
   Joe Roach 
 January 29, 2025
 
 
 recommends  Hillside is great for both repairs and major system replacements. Reasonable prices and great service!
  
 
 
     Posted on Facebook  
   
   Lauren Riebel 
 November 26, 2024
 
 
 recommends  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.
  
 
 
     Posted on Facebook  
   
   Wendy Lewis 
 July 25, 2024
 
 
 recommends  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!
  
 
 
 
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 Excellent4.8249 reviews
 4.8
 Excellent249 reviews
  Write a review 
 
 
 
      Posted on Google  
   
   Jessica Casson 
 September 28, 2026
 
 
   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  
   
   Stephanie Butcher 
 September 28, 2026
 
 
   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  
   
   Jen Billips 
 September 28, 2026
 
 
   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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COUPONS & REBATES

$1000 OFF A NEW A/C AND FURNACE COMBO INSTALLATION

$500 OFF A NEW DUCTLESS HVAC & FURNACE COMBO INSTALLATION

FREE 12-YEAR EXTENDED WARRANTY

10¢ OFF PER GALLON OF HEATING OIL

SCHEDULE A FREE ESTIMATE TODAY!

Join Over 5000 Customers Who Trust Hillside For

THE TRUSTED COMFORT EXPERTS OF DE, MD, & PA

WE LOVE OUR CUSTOMERS

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

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

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THE TRUSTED COMFORT EXPERTS OF DE, MD, & PA

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