As temperatures begin to rise, many homeowners wait until the first hot day to turn on their air conditioning—only to find it’s not working properly. At D.E. Duffey & Sons, we recommend testing your AC system early in the spring to make sure it’s ready......
As winter comes to an end and temperatures begin to rise, it’s time for homeowners to shift from heating their homes to preparing for warmer weather. This seasonal transition is the perfect opportunity to make sure your HVAC system is operating efficiently and ready for......
A Simple Winter Reminder from D.E. Duffey & Sons When snow hits Delaware County and the Main Line, most homeowners rush to clear the driveway and front steps. But there’s one important area that often gets overlooked: 👉 The pathway to your heating oil fill......
Your heating system rarely stops working without warning. In most cases, furnaces show clear signs of trouble before they completely fail. If you live in Pennsylvania and rely on a furnace to keep your home warm, recognizing these red flags early can help you avoid......
This winter has delivered more than just typical cold weather. During the 2026 heating season, meteorologists have tracked polar vortex activity pushing Arctic air farther south, resulting in prolonged cold snaps, winter storms, and increased demand on home heating systems throughout our region. For homeowners,......
A new year is the perfect time for fresh starts—and that includes how you heat and cool your home. As we head into 2026, homeowners across southeastern Pennsylvania are looking for ways to stay comfortable, control energy costs, and make smart, long-term decisions for their......
Happy Holidays from D.E. Duffey & Sons: Keeping Your Home Warm All Winter Long As the holiday season arrives and temperatures drop across Pennsylvania, everyone at D.E. Duffey & Sons would like to wish you and your family a warm and happy holiday season. Winter......
As December arrives across Montgomery and Chester Counties, the real heating season begins. Nights get colder, temperatures drop quickly, and your heating system shifts from occasional use to running almost nonstop. This is exactly when homeowners begin noticing something surprising:their heating system may actually be......
As December begins across Montgomery and Chester Counties, temperatures start dropping quickly — and your heating system goes from light use to running almost around the clock. This is exactly when hidden issues begin to surface. Every winter, D.E. Duffey sees the same pattern: small......
When it comes to keeping your home comfortable, customers want more than just quality equipment or competitive pricing — they want dependable people who truly care. That’s why customer reviews are so important. They help homeowners across the Greater Philadelphia area discover why D.E. Duffey......