Don’t be left without heat when you need it most.

Peace of mind (and heat) is guaranteed with an annual D.E. Duffey maintenance plan.

Now, when you sign up for a Duffey maintenance plan, you’ll get THREE years of coverage and comfort for the price of one!* Rely on us for around-the-clock, priority service on your heating and cooling systems. Protect your heating system with a Duffey protection plan today. You’ll be glad you did.

Or call us at (610) 940-1400 for more info

Get 3 years maintenance for the price of 1

Optimal equipment performance

Saves money

Ensures your heating system works when you need it most!


Welcome to D.E. Duffey & Sons, your trusted, local, 4th generation home comfort partner.  Since 1898, suburban Philadelphia home-owners have trusted us to provide complete heating and cooling solutions for their families.  We have experienced a lot in nearly 120 years, as have our loyal customers, but throughout that time we have strived to meet the ever-changing needs of the communities we serve.  We have done this through an unwavering commitment to delivering an exceptional level of service for our customers in everything that we do.  This is our promise, it is who we are, and what we do each and every day.  It is what has driven our growth for over a century and it is what will fuel our continued growth in the future.  While we are extremely proud of our past, Duffeys remains on the cutting edge of our industry. We offer the latest in high efficiency heating and cooling systems and a team of installation and service professionals that are truly the best around.  We believe that this is a perfect combination of past and future and, along with our commitment to the customer experience, positions Duffeys as the clear choice as your complete comfort partner.  

Noticed your oil level’s running low? Call or email us today to schedule your next delivery.

Having a heating or cooling issue?  Due for your annual tune-up? Contact Duffey’s today.

Become a customer and experience the D.E. Duffey difference today.


D.E. Duffey is happy to meet the heating oil fuel delivery needs of residents of Montgomery County, and select areas of surrounding counties. We offer delivery as well as HVAC maintenance, service, and installation.

CALL US TODAY AT (610) 940-1400


D.E. Duffey & Sons, Inc.
1982 Butler Pike
Conshohocken, PA 19428
Phone: 610-940-1400
Fax: 610-940-1404

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