Home Comfort Upgrades Services in DE, PA, & MD
Keeping your paws comfy all year long often takes more than just heating and cooling products and services.
Smart Device Control. Hillside proudly sells and installs modern, remotely accessible Honeywell thermostats. Control your thermostat from anywhere using your smartphone or computer, allowing you to manage temperatures according to your schedule.
Tankless Water Heaters. A tankless water heater is an excellent alternative to the traditional “tank” water heater. They are affordable and flexible, accommodating many replacement situations. Install a tankless water heater today and never again worry about running out of hot water, water pressure, or planning when to shower in your home.
REQUEST FREE ESTIMATE
This contact form does not substitute for a service call request. Please call our office 302-738-4144 or 410-398-2146. Thank You.
Why Invest in Home Comfort Upgrades?
Home comfort upgrades improve efficiency, control, and long-term savings. Homeowners in New Castle County, DE, Chester County, PA, and Cecil County, MD can reduce energy costs and enjoy more consistent comfort with modern systems.Why Smart Thermosotats
Take control with smart thermostats from Honeywell.- Adjust temperature remotely
- Set energy-saving schedules
- Monitor usage and improve efficiency
- Integrate with smart home systems
Why Tankless Water Heaters
Tankless water heaters deliver hot water on demand.- Endless hot water
- Energy-efficient operation
- Space-saving design
- No more running out during peak use
SCHEDULE A FREE ESTIMATE TODAY!
Call Hillside Heating and Cooling to schedule a FREE estimate for a new smart thermostat or tankless water heater installation 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.
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Joe RoachJanuary 29, 2025recommends
Hillside is great for both repairs and major system replacements. Reasonable prices and great service!Posted on Facebook![]()
Lauren RiebelNovember 26, 2024recommends
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 LewisJuly 25, 2024recommends
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!Load more
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R MAugust 25, 2026
Very professional. Highly recommendPosted on Google![]()
Brandon ElmanAugust 17, 2026
Justin from Hillside came out to do a tune-up on our heat pump with auxiliary oil and replace a fuel gauge. He was very helpful in answering questions and service was fast, professional, and affordable.Posted on Google![]()
Aaron WrightAugust 12, 2026
Great service by great people. Highly recommended.Load more
Proudly Serving New Castle County, DE, Cecil County, MD and Southern Chester County, PA.