Duct Leakage Testingin Freehold, NJ
You can feel it but you cannot see it. One room never gets warm. The bills keep climbing. The system runs and runs. A lot of that comes down to ducts that leak air into your attic, basement, or crawlspace before it ever reaches you. You cannot fix what you have not measured. Duct leakage testing puts a real number on the problem. Novus Mechanical performs duct leakage testing across Freehold and Monmouth County, and the test is often done as part of a home energy audit.
This is the test that tells us where your money is going. Then we go after the leaks that actually matter, instead of taping random joints and hoping.
What is a duct leakage test?
Your duct system is supposed to be a sealed loop. Air goes out the supply vents, comes back through the returns, and none of it should escape along the way. In most older homes around Freehold, plenty of it does.
A duct leakage test measures how much. We seal off the vents and connect a calibrated fan, called a duct blaster, to the duct system. The fan pressurizes the ducts, and we read how hard it has to work to hold that pressure. The harder it works, the more your ducts leak. The result is a single number that tells us how tight or how loose your duct system is. The U.S. Department of Energy estimates the average home loses 20 to 30 percent of the air that moves through its ducts to leaks. That is conditioned air you already paid to heat or cool, gone.
The test takes about an hour for most homes, and you get the number plus a plain explanation of what it means.
Better air, start to finish
What the result tells you
The number does two things. It tells you how much air your ducts are losing, and it points us toward roughly where the leaks are.
That second part matters. A high leakage number on a system that runs through an unconditioned attic means your furnace is heating the attic every winter. The same number on ducts in a finished basement is a different conversation. We read the result against where your ducts actually run, so the fix targets the leaks that cost you, not the harmless ones.
Once we know the real loss, sealing becomes worth the money. Without the test, sealing ducts is guesswork. You might spend on joints that were already tight and miss the gaps draining your system. The measurement is what turns "let's seal some ducts" into a plan.
Air leakage measured at 50 Pa
What we do with the number
A duct leakage test is the first step. The fix is usually targeted duct sealing and repair.
Once the test shows where the system bleeds air, we seal those spots with mastic and proper materials at the joints, boots, and connections that the number flagged. Then, on a real job, we can retest to confirm the leakage dropped. Measure, seal, measure again. That is the difference between a guess and a repair you can trust.
A tighter duct system means more of your heated and cooled air reaches the rooms you live in. The furnace and AC stop working overtime to make up for what they are losing. Comfort goes up, runtime goes down.
How it pairs with the blower door and the energy audit
Duct leakage testing answers one question: how leaky are the ducts. A blower door test answers a different one: how leaky is the whole house. The blower door measures air escaping through walls, windows, attic hatches, and the building shell. The duct test measures air escaping the duct system itself. Two separate problems, two separate measurements.
Most homes have some of both. That is why the two tests work so well together inside a full home energy audit. The audit ties the numbers to your real bills and your real comfort complaints, so you fix the things that move the needle first. The duct test is the "how leaky are the ducts" piece of that bigger picture.
Behind every test are real credentials. Novus Mechanical holds NCI Residential HVAC System Performance Technician certification (#25-142-01) and NCI Residential Air Balancer certification (#25-143-01), plus EPA #P165BDDE28EAD0701. That training is the reason the measurement is done right and the results actually guide the work.
Novus Mechanical has served NJ homeowners since 2016 and is fully insured, with commercial liability and workers' comp. When you are ready to find out what your ducts are costing you, schedule your appointment or call (848) 288-1133.
Duct Leakage Testing FAQ
Get a Real Diagnosis, Not a Guess
We measure your home, explain what we find, and hand you one clear price. Book a consultation in Freehold or Monmouth County.