Air Duct Testing in Houston

How Long Does Testing Take

• Single system home or townhome about 60 to 90 minutes
• Two systems about 2 to 3 hours
• Larger homes or commercial suites time estimate provided during booking

Access and setup can add time. Tight attics, high ceilings, or hard to reach returns may take a bit longer. We work safely and efficiently.

What You Can Do To Prepare

A little preparation makes the visit smoother.

• Clear access to the air handler and return grills
• Make sure we can reach every supply register
• Secure pets and let kids know we are taping vents temporarily
• Replace a clogged filter if the system will not run with it removed
• Ensure power is available for our equipment
• During construction keep ducts capped before final to avoid dust inside the system

Do you have a ladder we can use, or should we bring one? We always bring our own, but it helps to know about access beforehand.

Meeting Local Code Requirements Across Houston

Many new builds and remodels in the Houston area require passing duct leakage test results before final inspection. Our reports are accepted by local building departments throughout Greater Houston, including the City of Houston and nearby jurisdictions in Harris, Fort Bend, Montgomery, Brazoria, and Galveston counties. We confirm the required threshold for your project and deliver results that meet submission standards.

• Clear pass or fix list based on your permit needs
• System specific data and photos
• Digital delivery to your inbox, builder portal, or inspector

Not sure what your project requires? We will check with your builder or inspector and clarify the target before we begin.

Typical targets explained

Many projects in our area aim for a duct leakage limit that equals a small percentage of the home’s conditioned floor area. Builders often shoot for 4 to 5 CFM25 per 100 square feet for a final test. Rough in testing usually allows a higher number. Your exact pass threshold depends on your jurisdiction, project type, and test stage. We verify the right target before we start so there are no surprises.

Understanding The Numbers

• CFM25 means cubic feet per minute of air leaking at a pressure of 25 Pascals. Lower is better.
• Total leakage refers to all leakage to anywhere. This is good for quality control and code compliance in many cases.
• Leakage to outside refers to leakage that bypasses the building and goes to the outdoors or attic. Some projects require this method.
• Equivalent leakage area is a way to picture the total hole size. This helps when deciding on repairs.
• Static pressure and airflow are related checks that can reveal restrictions or other issues that affect comfort.

During the walk through we explain your results in plain English and help you decide what to do next.

After The Test Fixing Leaks and Improving IAQ

If you pass, great. We send the report and you are done. If you do not pass or you want to improve performance further, we can help.

Common leak spots and fixes

• Boot to drywall gaps at ceiling or floor grills. Seal with mastic, mesh, and trim rings as needed.
• Plenum seams and takeoffs. Seal with mastic and proper tape.
• Flex duct connections that slipped or were never clamped tightly. Reconnect, clamp, and seal.
• Air handler cabinet leaks and access panels. Add gaskets or sealant and confirm latches are tight.
• Panned returns and wall cavities used as returns. Line and seal properly.
• Line set and wiring penetrations into the return. Seal around openings.

We use mastic and UL 181 foil tape for lasting results. Not the gray fabric tape from a junk drawer. There is a reason they call it duct tape but it is not for ducts.

Indoor air quality benefits

Sealing leaks can cut off pathways that pull dusty attic or garage air into your home. After sealing, many homeowners notice less dust on surfaces and more stable humidity. If ducts are dirty from years of air bypass, our duct cleaning team can clean and sanitize the system. We can bundle testing, cleaning, and sealing during one visit when schedules allow.

Houston specific issues we watch for

• Superheated attics in summer that can reach 130 to 150 degrees
• High outdoor humidity that finds its way into leaky returns
• Condensation near metal boots and grills when leakage cools the surrounding area
• Rodent or pest damage that tears flex duct
• Old tape on ducts that has dried and fallen off in the attic

Catching these issues early saves you money and headaches later. For general sealing guidance you can also review the DOE page on ducts.

New Construction vs Existing Homes

New construction or major remodel

• Rough in test where ducts are installed and sealed but drywall is not finished. This is the best time to find and fix leaks.
• Final test after finishes are in place. We verify compliance before inspection. We protect finishes when taping grills.
• Coordination with your superintendent to align with other trades and keep the schedule on track.

Existing homes

• No demolition needed for testing
• Careful taping on painted surfaces and finished grills
• Diagnostic steps that avoid damage to finishes
• Repair options that respect your budget and time

If your home is older with panned returns, we can discuss options that bring performance up without major construction.

Residential and Light Commercial Testing

We test single family homes, townhomes, apartments, and small commercial suites.

• Apartments and condos for turnover or rehab
• Retail build outs and office suites
• Daycare, medical, and dental suites with strict comfort needs
• After hours scheduling to reduce disruption

Tell us your timing and access needs. We show up prepared. For business spaces ask about our commercial duct testing options.