Heating System Professional Services for DE, MD, & PA

Hillside installs, maintains, and repairs oil, natural gas, propane gas, and electric heating systems in DE, MD, & PA.

Hillside is here to help—from selection and purchase to delivery, installation, and service; we’ll ensure your paws are comfy all year long.

Our professional staff is fully trained to install, maintain, and repair oil, natural gas, propane gas, and electric heating systems. This includes hot air, hot water, boiler, heat pump, and water heaters (traditional and modern tankless on-demand water heaters). We’ve been successfully installing central heating solutions for over 70 years.

Hillside is capable of removing and replacing fuel oil tanks, both steel and modern Roth double-wall tanks.

We carry and service most name-brand equipment, including but not limited to Armstrong Air, Thermo Pride, Peerless Boiler, Mitsubishi and other ductless systems, Rinnai Tankless Water Heaters, Honeywell, Aprilaire, and Roth fuel oil tanks.

Our services include indoor air quality, humidifiers, humidification, air cleaners, and dehumidifiers. Hillside has options ranging from economy to high efficiency, no matter your budget.

Hillside is proud to sell and install all new, modern, and remotely accessible thermostats made by Honeywell—controlling your thermostat from anywhere! Connect from smartphones or computers to manage temperatures according to your schedule.

New Furnace Sales & Installation

If you need a new furnace in New Castle County, DE, Cecil County, MD, or Southern Chester County, PA,  Hillside Heating & Cooling will guide you through the sales and installation process. We’ll help you choose the best new heating system for your heating needs. Our heating systems are built for efficiency and performance, delivering dependable warmth at a budget-friendly price!

Furnace Repair

If your furnace is sputtering or has come to a complete halt, prevent indoor temperatures from plummeting by calling Hillside Heating & Cooling. As heating furnace repair specialists serving New Castle County, DE, Cecil County, MD, and Southern Chester County, PA, we want to restore the heat in your home as soon as possible so you can be comfortable again. Contact our friendly customer service representatives to schedule your furnace repair now!

Furnace Cleaning & Maintenance

Regular furnace cleaning and maintenance help prevent frequent failures, inefficient performance, and poor indoor air quality. Hillside Heating & Cooling is the leading furnace cleaning and maintenance specialist in New Castle County, DE, Cecil County, MD, and Southern Chester County, PA. Schedule our  30-point Furnace Tune-Up designed to prevent heating problems this season.

Boiler Sales, Maintenance, & Repairs

Hillside Heating & Cooling are boiler repair and new boiler installation specialists in New Castle County, DE, Cecil County, MD, and Southern Chester County, PA. Our expert technicians have been trained to repair any boiler regardless of the make and model. If your boiler needs service or a new boiler, you can count on Hillside’s heating professionals to do the job and do it right the first time. Contact Hillside, your Boiler Specialist, for a free estimate!

Heat Pump Sales & Installation

Are you seeking a new heat pump for your home in New Castle County, DE, Cecil County, MD, or Southern Chester County, PA? Upgrading your heating and air conditioning system presents an excellent opportunity to achieve various benefits! Heat pumps offer an efficient solution that allows you to reduce your reliance on a central furnace while still enjoying optimal indoor comfort. With the latest advancements in heat pump technology, you can expect a consistently reliable and remarkably quiet heating and cooling system.

Repair or Replace MY Outdated Heating Equipment?

Your heating in DE, PA, and MD is one of the most important investments and pieces of equipment in your home. We can have brutally cold winters. So, when should I replace my heating system? Let our heating expert explain.

Hillside Maintenance Plans

Replacement Parts, Inspections, Tune-Ups, Adjustments, and more. See what plan is right for your needs.

• Heating Maintenance Plan
• Air Conditioning Maintenance Plan

Hillside Oil Tank Protection and Replacement Warranty

Hillside offers a tank protection program by TANK-GUARD®. This service is a corrosion and protection warranty giving “Peace of Mind” knowing the expense of replacing your heating oil tank will be covered if a replacement becomes necessary due to leaks.

• Tank-Guard Proactive Heating Oil Tank Warranty

Hillside Account Application

Establish an account by filling out this application. It’s that easy!

Account Application (PDF)

Account Application (online)

Budget Sign-up Form

Our budget plan stretches annual expenses into monthly payments. We use a simple formula…your annual expense with Hillside is divided into the number of months remaining in our budget season. Plans designed specifically for your budget.

• Budget Plans