Duct Leakage Test in Demarest, NJ

Ensure proper HVAC performance and code compliance by scheduling professional duct leakage test in Demarest, NJ. Our certified technicians measure and identify ductwork air leaks, assisting homeowners and builders in boosting comfort, limiting energy waste, and maintaining state compliance.

Why Duct Leakage Test is Important In Demarest, NJ

States and municipalities have adopted the 2015 IECC, International Energy Conservation Code for single-family buildings and the 2018 International Energy Conservation Code for multi-family buildings. The change will result in several substantial implications for home builders and HVAC contractors engaged in work across the state. A Duct Leakage Test as well as the required Blower Door Test must now be performed on new or remodeled homes following the 2015 regulations. Did you know that duct leakage is one of the top reasons for air loss in homes in Pennsylvania, New Jersey, and Delaware? Leaked air can increase your energy costs, overwork your HVAC system, and distribute insulation particles and dust around your home. This makes duct leakage test vital for homes both old and newly built. Keep reading to find out why duct leakage test matters and what benefits it provides.

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How a Duct Leakage Test Is Conducted

To begin a duct leakage test in Demarest, NJ, your technician will seal off all supply and return registers except for the main return or the air handler. A calibrated duct blaster fan is then mounted to the opening. This fan creates negative pressure inside the ducts, making air leakage locations easier to find.

The duct blaster system, along with a precision pressure sensor, measures airflow and highlights leaks in the ductwork without inconveniencing you at 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 efficient, mess-free, and completely non-intrusive for residents. Most tests in Demarest, NJ are done in about 30 to 60 minutes, and the resulting enhancements can support your home’s comfort and efficiency for many years.

How to Measure Duct Leakage

Duct leakage is defined in cubic feet per minute (CFM) per 100 square feet of conditioned space within the structure. Your technician uses a nanometer to identify subtle pressure differences, helping determine how much air is leaking from the ducts. Understanding this number helps you detect inefficiencies, assess needed upgrades, and ensure your home complies with local energy code requirements in Demarest, NJ.

Cost of Excessive Duct Leakage

If elevated utility bills, shifting temperatures, or repeated HVAC issues occur in your home, duct leakage may be the factor behind them. According to ENERGY STAR, many homes lose as much as 20% to 30% of conditioned air through duct leaks. Air entering from outside—whether warm or cold—makes your HVAC operate harder, causing energy costs to climb and comfort to decrease.

Overworked equipment also contributes to repeated breakdowns and pricey repairs. Proper duct sealing helps protect and extend the long-term lifespan of your HVAC system, minimizing the need for repeated maintenance.

Duct leaks can also let in dust, mold spores, added moisture, and other harmful contaminants. This can amplify allergy problems, impact air quality indoors, and slowly create costly structural damage behind walls or ceilings.

How to Properly Seal Ductwork in an Old Home

The 2015 IRC/IECC calls for new homes to include duct systems that are completely sealed using efficient materials such as mastic, foil tape, and insulation. But what do you do about leaks that sit deep within walls or ceilings?

Aerosol sealing technology (AeroSeal) can identify and seal leaks that lie deep inside ductwork. To apply this method, every vent is sealed aside from one access point. The HVAC system is isolated, and a machine is connected to the ducts. It pressurizes the ducts and circulates a fine aerosolized sealant that locates and fills tiny leaks beyond the reach of typical sealing.

This method works best for small to medium leaks. However, large openings usually require traditional manual sealing using mastic and tape. Technicians conduct duct leakage test before and after aerosol sealing to see how much the leakage dropped and ensure the treatment worked properly.

Common Areas of Duct Leakage

The most typical place where ducts leak air is at their joints. Ductwork is built from multiple metal sections pressed tightly with fittings and metal bands, yet these joints are rarely airtight.

As your HVAC system adjusts temperatures throughout the year, the ducts go through expansion and contraction. Over time, this movement causes joints to lose their seal, creating gaps and leaks — making a duct leakage test valuable for any home in Demarest, NJ, whether new or old.

Many energy auditors check for leaks by feeling along the ductwork and using a small tool to gauge the size of gaps between joints. If your duct system wasn’t sealed using mastic and approved tape, there is a strong chance that air leaks are occurring.

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

To achieve a passing duct leakage result, your system needs to be under 4 CFM per 100 square feet when the air handler is installed, or 3 CFM per 100 square feet when it isn’t. For new construction, no home can receive an occupancy certificate without first passing a duct leakage test.

If your home in Demarest, NJ fails a duct leakage test, you are probably spending more than you should on heating and cooling — while also putting long-term stress on your HVAC system. Meeting the 3–4 CFM requirement is required not only for code approval but for keeping your home efficient and comfortable.

Your technician will also recommend effective ways to fix leakage issues so you can earn a passing score, save on utilities, and improve home performance.

Local Energy Audits — affordable duct leakage test in Demarest, NJ

Local Energy Audits is proud to serve families and builders across Demarest, NJ and the surrounding local areas. We specialize in identifying and addressing duct leakage and energy inefficiencies using blower door tests and duct leakage tests. Whether you’re constructing a new home or optimizing an existing one, we’re here to help.
If you’d like to schedule a test, call us during business hours or contact us online to request an appointment.

The Duct Leakage Test Steps Explained

A duct leakage test begins with duct mask tape being placed on all ducts and registers on both the supply and return sides.

After the registers are sealed, we connect the duct tester either to the HVAC unit itself or a central return.

The ducts are then depressurized to a Pascal of 25. With the ducts depressurized we can use the nanometer to get a reading of the duct leakage.

Schedule Your Duct Leakage Test in Demarest, NJ

Ensure your HVAC system functions efficiently, adheres to codes, and stays in top condition through reliable duct leakage test in Demarest, NJ. Whether you’re a homeowner wanting better comfort or a contractor reaching the final inspection stage, our certified team provides fast, accurate, and affordable testing.

We use industry-standard duct blaster equipment and deliver on-site help to ensure you pass your test, lower energy waste, and maintain your HVAC system’s long-term reliability.

📞 Call 888-213-3975 ✉️ Request a Quote

Serving homeowners, builders, and contractors across Demarest, NJ with dependable and energy-efficient testing solutions.