When summer temperatures arrive, your heating system is probably the last thing on your mind. However, the warmer months are one of the best times to inspect your heating oil tank and prepare your home for the next heating season. Checking your tank now gives you...
Choosing the right size air conditioner isn’t just about staying cool—it directly impacts your energy costs, comfort, and how long your system lasts. At D.E. Duffey & Sons, we often see homeowners dealing with systems that are either too large or too small, leading to...
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, polar...
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 is one...
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 problems...
If your air conditioner isn’t cooling like it used to, the issue might be refrigerant-related. But what is refrigerant—and why is it so essential to your comfort? What Is Refrigerant? Refrigerant is the chemical compound inside your air conditioning system that makes cooling possible. It absorbs heat...
When it comes to heating your home or business, not all heating oil is created equal. At D.E. Duffey & Sons, we deliver premium heating oil that is blended with a Preventative Maintenance Treatment (PMT). This special blend ensures that you get more heat for...
As the summer heat sets in, many homeowners focus on keeping their homes cool and comfortable. However, another important aspect to consider is indoor air quality (IAQ). Poor IAQ can lead to health issues, especially for those with allergies or respiratory conditions. Here are some...