Duct Leakage Test in Brandamore, PA

How a Duct Leakage Test Is Conducted

To kick off a duct leakage test in Brandamore, PA, your technician will block all supply and return registers while keeping the main return or air handler accessible. A specially calibrated duct blaster is then installed onto the opening. The fan lowers the pressure inside the ducts, helping reveal any leakage points.

The duct blaster works together with a precision pressure sensor to measure airflow and pinpoint leaks in the ductwork without disturbing your home. A duct leakage test — also called a duct blaster test — locates the points where duct air escapes, helping you implement the right sealing solution.

duct leakage test is fast, debris-free, and completely resident-friendly. Most tests in Brandamore, PA finish within 30 to 60 minutes, and the benefits to your home’s comfort and efficiency can last for years.

How to Measure Duct Leakage

Duct leakage is evaluated in cubic feet per minute (CFM) per 100 square feet of conditioned space inside the home. Your technician uses a nanometer to identify pressure differences, which provide a clear picture of how much air is leaking from the ductwork. Understanding this number allows you to highlight problem zones, explore improvement possibilities, and confirm compliance with local energy code requirements in Brandamore, PA.

Cost of Excessive Duct Leakage

If you’re experiencing spikes in utility bills, uncomfortable temperature variations, or ongoing HVAC repair needs, duct leakage may be to blame. According to ENERGY STAR, many homes lose as much as 20% to 30% of conditioned air through duct leaks. If hot or cold air from outdoors enters your system, your HVAC works harder than necessary, causing energy costs to rise and comfort to fall.

Overworked equipment also accelerates wear and tear, resulting in more breakdowns and costly repairs. Proper duct sealing helps safeguard the long-term reliability of your HVAC system, extending its lifespan and reducing how often maintenance is needed.

Duct leaks can also introduce dust, mold spores, excess humidity, and other contaminants into the duct system. This can intensify allergy symptoms, harm indoor air quality, and cause long-term structural damage behind walls or ceilings.

How to Properly Seal Ductwork in an Old Home

The 2015 IRC/IECC ensures that new homes are built with duct systems sealed entirely using efficient materials such as mastic, foil tape, and insulation. But what about leaks that occur deep behind walls or ceilings out of sight?

Aerosol sealing technology (AeroSeal) enables effective sealing of leaks hidden inside ducts. To execute this method, all vents are sealed shut except a single access point. The HVAC system is isolated, and a machine is attached to the duct network. It pressurizes the ducts and emits a fine aerosolized sealant designed to fill small leaks unreachable with standard sealing.

This method works efficiently for small to medium leaks. However, larger gaps usually require manual sealing using mastic and tape. Technicians administer a duct leakage test prior to and following aerosol sealing to measure leakage changes and ensure the method was successful.

Common Areas of Duct Leakage

The most common point where ducts leak air is along the joints. Ductwork is made from multiple metal pieces pressed together with tight fittings and metal bands, but these connections are rarely completely airtight.

As your HVAC system shifts between hot and cold cycles all year long, the ductwork expands and contracts. Over time, this movement causes the joints to loosen, opening gaps and leaks — making a duct leakage test beneficial for both new and older homes in Brandamore, PA.

Many energy auditors verify duct leakage by feeling around the ducts and using a small tool to assess the opening size at the joints. If your duct system lacks proper sealing with mastic and approved tape, there is a high chance that leakage is taking place.

What Is an Acceptable Amount of Duct Leakage per Energy Code?

To achieve a passing duct leakage result, your system has to be under 4 CFM per 100 square feet when the air handler is in place, or 3 CFM per 100 square feet without it installed. For new construction, the duct leakage test must be passed prior to the home being approved for an occupancy certificate.

If your home in Brandamore, PA is unable to pass a duct leakage test, you are probably spending too much on heating and cooling — while your HVAC equipment endures long-term stress. Meeting the 3–4 CFM requirement is important not just for compliance, but for safeguarding your home’s comfort and long-term energy efficiency.

Your technician will also offer specialized recommendations to repair leakage issues so you can meet passing requirements, reduce utility bills, and improve your home’s performance.

Local Energy Audits — affordable duct leakage test in Brandamore, PA

Local Energy Audits proudly provides service to homeowners and builders throughout Brandamore, PA and the surrounding region. We specialize in revealing duct leakage and energy inefficiencies through blower door and duct leakage test. Whether your project is new or existing, we’re here to assist.
If you’d like to book a test, call us during business hours or contact us online to request an appointment.