Air Duct Cleaning
J.C. Pauli, Air Duct Cleaning Manager
April 23, 2026
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Vegas Homeowner Guide
Trunk line undersized for system capacity
Disconnected or fallen attic branches
Old fiberglass duct board breaking down inside
Returns and supplies mismatched in size (NEW)
Check any that match. Two or more, and it’s time for a diagnostic – not another guess.
These four causes account for most calls like this we run across the Las Vegas Valley – Summerlin, Henderson, Spring Valley, and everywhere in between.
HVAC equipment gets sized in tons, but the ductwork has to match. We routinely find Vegas homes where a 4-ton system feeds a duct trunk designed for 2.5 tons. The system runs at full capacity, but the ductwork chokes off airflow. You get higher static pressure, shorter equipment life, and rooms that never reach setpoint — no matter how new the AC is.
Flex duct connections held only by zip ties or worn-out tape come apart over years of attic temperature swings. The branch separates from the trunk, and that room’s vent now blows raw attic air — 140°F in summer, freezing in winter. Most homeowners never look. We find it on roughly 1 in 3 attic inspections in Vegas tract homes.
Many Vegas homes built between 1985 and 2005 used internal fiberglass duct board instead of metal. After 20 years of thermal cycling, the inner liner delaminates, the fiberglass sheds into your air stream, and the ducts collapse on themselves under static pressure. You can’t patch this — once it starts, the whole run needs replacement.
Even with perfect supply ducts, your system is only as good as the air it can pull back. We see Vegas homes with eight supply registers and one tiny return grille — the math doesn’t work. The system starves itself, the blower works against pressure, and total capacity drops 20% or more regardless of how new the equipment is.
From Summerlin to Henderson, here is how we’re keeping homes across the Las Vegas Valley cool and comfortable.
We were called out to troubleshoot a heating issue in a Las Vegas home where the master bedroom was the only area staying warm.
View Project
We diagnose on-site, photograph what we find, and walk you through it before we recommend a single repair.
Every part and labor line itemized before we start. If we find something extra mid-job, we stop and call you before adding a dollar.
We fix the part that's failing. If a $40 capacitor solves it, that's the job — not a $1,200 replacement you didn't need.
We run the system, take a reading, and confirm the symptom that brought us out is gone. If it isn't, we stay and keep working.
Does closing vents in unused rooms save energy? No — it's one of the most persistent HVAC myths, and in this video Bob's Repair shows what actually happens inside your system when you close vents. Instead of redirecting air where you want it, you disrupt the airflow your system was designed for, which can cost you comfort and efficiency rather than saving you money.
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Why is the power bill still climbing after installing a new AC? Because dropping a brand-new unit into a "tired" attic ecosystem is a losing bet — with thin insulation and restricted airflow, the new system just works harder for the same result. In this video, Bob's Repair performs a Full Attic Upgrade on a Las Vegas home — system, airflow, and insulation together — which is what it actually takes to fix comfort and high bills for good.
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One room always too hot, and high electric bills you can't explain? It's probably not your AC unit at all — this 35-second video shows exactly what's going on with the ductwork in your attic and why it's the real reason that room never cools. Watch to the end to see what happens to the electric bill when Bob's Repair fixes the airflow in a Las Vegas home.
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What's the best duct system for a commercial space? In this video, Bob's Repair replaces old commercial ductwork with new spiral steel duct — from sparks flying to final seal — a system that delivers stronger airflow, higher efficiency, and a cleaner exposed look. It's the air system you'll never see in a Las Vegas commercial space, but your tenants and employees will always feel the difference.
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