How much air can leaky ducts waste?
ENERGY STAR notes that typical homes can lose 20-30% of moving air through duct leaks, holes, and poor connections.
Duct Leakage: How Much Cold Air Is Escaping Your Phoenix Home?
Leaky ducts can waste cooled air, raise bills, and create hot rooms. Learn how duct leakage testing and duct sealing work in Phoenix homes.
QUICK ANSWER
Duct leakage means conditioned air escapes from the duct system before reaching the living space, or unconditioned attic air is pulled into the system. In Phoenix, leaky ducts in hot attics can waste cooling, create hot rooms, increase dust, and make the AC run longer. Duct testing shows how much leakage exists.
Your AC can be working perfectly and still lose the game if the ducts leak. That is because ducts are the highway for cooled air, and some homes built that highway with exits into the attic. Duct leakage is one of the most important hidden comfort problems in Phoenix homes because many ducts run through extremely hot spaces.
What duct leakage is
Duct leakage happens when air escapes through loose connections, torn flex duct, gaps, holes, leaky plenums, or poorly sealed boots. Supply leaks lose cooled air before it reaches rooms. Return leaks can pull hot attic air and dust into the system. Both types make the AC work harder and can create comfort complaints that seem like equipment failure.
Why leaks matter more in Phoenix attics
In a mild climate, duct leakage is wasteful. In a Phoenix attic during summer, it is wasteful with theatrical intensity. Cooled air leaking into an attic is energy you paid for but never enjoy. Leaky return ducts can also pull superheated attic air into the air stream, raising the load on the AC and potentially increasing dust and indoor air quality complaints.
Signs you may have duct leakage
Duct leaks are not always visible from inside the living space, but the symptoms are often noticeable.
- Hot or cold rooms.
- Weak airflow at certain vents.
- High energy bills.
- Dusty rooms.
- AC runs longer than expected.
- Musty or attic-like odors from vents.
- Uneven temperatures after equipment replacement.
How duct leakage is tested
A duct leakage test uses diagnostic equipment to measure how much air escapes from the duct system. This is much better than guessing based on vent feel, which is basically HVAC palm reading. Testing helps determine whether sealing is needed and gives homeowners a clearer picture of where comfort and energy are being lost.
How duct sealing helps
Duct sealing can include sealing joints, boots, plenums, and accessible leaks with approved materials such as mastic or appropriate sealing systems. Damaged duct runs may need repair or replacement. Once leakage is reduced, more conditioned air reaches the rooms. That can improve comfort, reduce waste, and help the AC operate under better conditions.
Duct leakage and HVAC replacement
If you are replacing an AC system, duct leakage should be checked before or during the project. A new system attached to leaky ducts may disappoint immediately. Way Cool can evaluate ducts as part of a whole-home comfort plan so equipment, airflow, and building performance work together.
Frequently Asked Questions
Can duct sealing lower energy bills?
It can help reduce wasted conditioned air and may lower operating costs, especially when ducts are in hot attics.
How do I know if my ducts leak?
A duct leakage test is the best way to measure leakage. Symptoms include hot rooms, weak airflow, dust, and high bills.
Schedule a Way Cool duct leakage test or home performance audit to find out whether your cooled air is reaching your rooms or donating itself to the attic.
Got more questionsOr Want a Quote?
Schedule online or call. $89 service call, waived with any approved repair.