Welcome to the D.E. Duffey & Sons Web Site. Our company is a full-service heating oil and HVAC contractor located in suburban Philadelphia, PA. We have been keeping families comfortable since 1898 with exceptional service and quality products.
- Delaware Valley Fuel Dealer
- Better Home Heat Council
- Oil Heat America
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We had Duffey's Install a new heating and air conditioning system in our home and we were very pleased with the job.Steve and Nicole Brandt, Norristown
I have come to rely on Duffey's for prompt service. I also appreciate the quality in the service and products you deliver to my home.Mark Brody, Collegeville
I was very happy with the conversion from hot air to high efficiency hot water heating and multiple air conditioning system which included a high efficiency hot water heater.Joe Houldin, Chestnut Hill