Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
Fast, Reliable Duct Sealing Across Fresno
Duct sealing in Fresno typically costs between $450 and $1,800 depending on how much of the system needs work, and most jobs are completed in one day. The real problem in Fresno isn’t just dirty ducts, it’s that your conditioned air is leaking into the attic. You’re paying to cool 140°F attic air while your living room sits at 78°F.
Our crews work in Fresno weekly. We know the tract home layouts, the slab foundations, and the way original flex duct from the 1980s behaves after 40 summers of expansion and contraction. When you call (713) 936-5800, you reach a live person who can schedule a Fresno visit without routing you through three call centers.
Why Hollis Air Duct Houston Is Fresno’s Preferred Duct Sealing Company
Fresno homeowners call us because they’ve already tried the $99 duct cleaning special and realized it didn’t fix anything. Roy Castellanos runs our crews to a written standard called The Garrison Code. Arrive inside the window, price in writing before any work starts, complete the job by the book, leave the site clean. That’s it. No exceptions.
Every Fresno job gets the 365-Day Done Right Promise in writing. If the sealing work fails within a year, we return and make it right at no charge, including a free second visit. You’re not negotiating a return visit, it’s already in the contract.
We also answer the phone 24/7 with a live person. When your AC is running nonstop in August and your upstairs bedrooms are 8°F warmer than the hallway, you need to talk to someone who can schedule Fresno service, not leave a voicemail and hope.
Styles & brands we work with
Duct Insulation in Fresno
Duct insulation in Fresno is often the missing piece after sealing, because uninsulated or pest-damaged ducts in a 140°F attic lose cooling through the duct wall itself. Sealing the joints doesn’t stop heat transfer through bare metal or torn flex duct. Our Fresno crews inspect insulation condition during every sealing job and quote insulation repair or replacement as a separate, written line item.
What We Do
We wrap or replace insulation on accessible attic duct runs using professional-grade materials. For Fresno homes with blown-in insulation that’s settled or pest-damaged around ducts, we clear the affected area, seal the duct, and re-insulate. You see before-and-after photos of the actual duct work, not stock images.
When Fresno Homeowners Need It
If your attic ducts are sweating in winter fog or the insulation has been chewed through by rodents, insulation replacement is non-negotiable before sealing. Condensation rots insulation and reopens sealed joints as metal expands. Our pricing for duct insulation in Fresno typically runs $200 to $500 per run, depending on access and length.
HVAC Duct Sealing in Fresno
HVAC duct sealing in Fresno addresses the leaks that make your AC work harder than it should, using mastic and professional sealing systems rather than tape that peels in attic heat. Our Fresno crews use Abatement Technologies air duct sealing equipment to seal accessible joints, collars, and plenum connections. We brush and vacuum every surface before applying mastic, because mastic on dusty, oily duct metal in Fresno’s attics peels within a season.
What the Job Involves
We locate leaks with a visual inspection and camera where access allows, then seal with mastic, aluminum tape where appropriate, and sometimes aerosol sealant for inaccessible sections. After sealing, we verify the fix. On a 1982 single-story in Sunnyside last July, a blower door test showed static pressure dropped enough to restore airflow to two bedrooms that had been running 8°F warmer than the rest of the house.
When You Need It in Fresno
If your AC runs constantly from June through September and rooms at the end of the hall never cool down, you likely have duct leakage. Fresno’s summer attic temperatures exceed 140°F, which causes flex duct joints to separate over decades. Whole-system HVAC duct sealing in Fresno typically ranges from $600 to $1,800 for an average single-family home.
Trusted Brands We Service in Fresno
Our Fresno crews work on systems built around Rotobrush, Nikro, and Abatement Technologies equipment. If your home has filtration products from Honeywell or Aprilaire, we service those as part of the duct system, not as an upcharge afterthought. We keep the sealing materials and replacement parts needed for Fresno’s older flex and galvanized duct systems stocked on our trucks, which means fewer second trips and a faster turnaround when you’re already sweating through a Fresno summer.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in Fresno Homes
- Separated flex duct joints in 1970s – 1990s tract homes. Summer attic temperatures above 140°F cause the plastic collars and inner liners of original flex duct to degrade. We regularly find 30 – 40% of conditioned air leaking into unconditioned attic space before any sealing happens.
- Mastic failure on dirty duct surfaces. Fresno sits near active agricultural land, and fine almond and raisin dust gets pulled into attics and ducts. Mastic applied directly to that dusty, sometimes oily metal peels off within a season, so we brush and vacuum every surface before sealing.
- Pest-damaged duct insulation causing condensation. Rodents nest in Fresno attics and chew through insulation around ducts. When winter fog rolls in, that exposed metal sweats, moisture soaks the surrounding insulation, and mold reopens sealed joints as the metal expands and contracts.
- Degraded inner liners in original 1970s flex duct. The inner plastic liner of old flex duct tears at bends and keeps tearing. Sealing alone without replacing those damaged sections fails the next blower motor test, so we quote replacement where it’s needed and don’t pretend sealant is a cure-all.
Pricing for Duct Sealing in Fresno, TX
We Also Serve Cities Near Fresno
Our crews cover Fresno and the surrounding communities, including Alvin, Webster, League City, and parts of Houston. If you’re in one of those areas and need Duct Sealing work done right, we schedule service through the same live-answer line and the same written pricing standard. For homeowners specifically looking for Duct Sealing in Fresno, we’re already in your neighborhood weekly.
Serving Fresno, TX - Our Local Coverage Area
We’re based in the Fresno area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Duct Sealing in Fresno
What do you find most often in Fresno homes built before 2000 when you go to seal ducts?
We most often find separated flex duct joints, crushed returns under slabs, and original duct systems that have never been touched since installation. In Fresno’s older tract homes, the combination of 140°F attic temperatures, decades of expansion and contraction, and fine agricultural dust means we regularly find 30 – 40% air leakage before sealing. Call (713) 936-5800 to schedule an inspection, and we’ll show you exactly what’s happening in your ducts.
Can sealing ducts fix a room that gets noticeably hotter than the rest of my Fresno house?
Yes, and it’s one of the most common fixes we perform in Fresno. When ducts leak into the attic, the rooms at the end of the longest runs receive the least air. Sealing restores static pressure so those rooms actually get the airflow they were designed to receive. In Sunnyside last July, sealing brought two bedrooms that were 8°F warmer back in line with the rest of the house.
Does Fresno’s dry climate make duct sealing less important than in humid areas?
No, it makes it more important. Fresno’s 100°F summer days mean your AC runs nearly continuously for four to five months. Any leak pulls hot attic air into the system and pushes cooled air out through the attic. The cost of that leakage compounds over a longer cooling season than someone in a milder climate would ever face.
My 1980s Fresno home has galvanized ducts. Can you seal those without replacing them?
Yes, in most cases. We seal galvanized duct joints with mastic after brushing and vacuuming the metal clean. Galvanized duct in Fresno homes often has decades of grey agricultural dust coating the inside, and mastic will not bond to that. We prep the surface properly and seal accessible joints, then verify with a pressure test. If sections are rusted through or crushed, we quote replacement for those sections specifically.
How do I know if my Fresno home needs duct sealing versus just cleaning?
If your rooms are unevenly cooled, your AC runs constantly during Fresno summers, or you find dust accumulating quickly on furniture, those point to leakage. Cleaning removes contamination, but it does not stop conditioned air from leaking into the attic. The only way to know is a visual inspection and sealed-system testing. We’ll give you a straight answer and a written price either way. Call (713) 936-5800 and describe what you’re seeing.
Written by Roy Castellanos, Owner at Hollis Air Duct Houston, serving Fresno since 2004.