For more than 120 years, D.E. Duffey & Sons has been dedicated to one mission: keeping our friends and neighbors comfortable. Since our founding in 1898, we’ve built a legacy of trust and reliability in suburban Philadelphia and surrounding communities. While we take immense pride in our history, we see it as the foundation for building a brighter future—one that focuses on innovation and exceptional service. This commitment is what we call The Duffey Difference.

A Legacy of Trust and Commitment

As a 4th-generation, family-owned business, D.E. Duffey & Sons has earned the trust of local homeowners through decades of honest and dependable service. We don’t just view you as a customer—we see you as part of our family. Our customer-first culture is built on doing the right thing, the right way, every time. This principle has driven our growth for over a century, and it’s what fuels our continued success today.

What Sets Us Apart?

The Duffey Difference isn’t just a phrase—it’s the way we do business. Here’s what makes us unique:

1. Over 120 Years of Experience

Our long-standing history gives us the expertise to handle any heating or cooling challenge. From installing high-efficiency systems to offering reliable home heating oil delivery, we’ve seen and done it all.

2. Exceptional Customer Service

At D.E. Duffey, we believe every customer deserves personalized attention and respect. Our goal is to establish long-term relationships by consistently delivering outstanding service.

3. Top-Quality Heating and Cooling Systems

We partner with leading brands like Rheem, Fujitsu, Burnham, Lochinvar, Energy Kinetics, and more to offer state-of-the-art, energy-efficient systems. Whether you need a new installation or routine maintenance, our expert technicians ensure your system operates at peak performance.

4. Highly Skilled Technicians

Our team of technicians is among the best in the area, bringing both technical expertise and a commitment to excellence. With D.E. Duffey, you can trust that your heating and cooling systems are in capable hands.

Services Tailored to Your Needs

D.E. Duffey & Sons provides a comprehensive range of services to meet the diverse needs of our customers:

• Heating Oil Delivery: Affordable, reliable service to keep your home warm through the coldest months.
• Heating and AC System Installation: We specialize in high-efficiency systems that save energy and reduce costs.
• Maintenance and Repairs: Regular maintenance ensures your system stays efficient and minimizes the risk of breakdowns.

Your Trusted Total Home Comfort Partner

The Duffey Difference isn’t just about delivering services—it’s about delivering peace of mind. When you choose D.E. Duffey & Sons, you’re choosing a partner dedicated to your comfort and satisfaction. Our sincere hope is to welcome you into our family and build a relationship that lasts for years to come.

Contact Us Today

Ready to experience The Duffey Difference? Join the thousands of homeowners who have trusted us for over 120 years. Call us at 610-940-1400 or visit our website to learn more about our services and schedule your appointment: www.deduffey.com.

At D.E. Duffey & Sons, we don’t just promise exceptional service—we deliver it every day. Let us show you why we’ve been the trusted choice for home comfort since 1898.