Duct Work in Las Vegas
Published by Colton Air Conditioning, NV license 0092120
Nevada contractor license 0092120.
Call (702) 738-6976 first.
6545 S. Fort Apache Rd Ste 135 #467, Las Vegas, NV 89148 is a mailing address only. It is not a walk-in shop. The work happens at the house.
If we have already been out, leave a Google review.
A new air conditioner cannot cool a house if the air leaks into the attic. We find the duct problem before we sell equipment that will not fix it.
Valley attics cook. Flex duct that looked fine in March can sag, kink, and pull off boots after a few summers. The outdoor unit then gets blamed for a house that is leaking its cooling above the ceiling. Two-story plans and bonus rooms are where this shows up often. We do not start with a full duct replacement. We find the run that failed. If the duct system is actually fine, we say so. Related: ductwork problems guide, AC running but not cooling, AC repair.
Common duct calls
- The system runs and one side of the house never cools
- Bedrooms with the door closed get stale
- A return that is a single hallway grille
- Flex duct crushed in the attic or fallen off a boot
What we do
- Supply and return inspection, not a guess from the thermostat
- Disconnected, kinked, and leaking duct called out
- Repair when the duct can be saved
- A clear no when the duct is not the problem
Do not crawl the attic to “fix” a live system or pull disconnects yourself. Leave panels and the outdoor unit alone until the visit.
Weak airflow from the vents
Weak airflow means less air is reaching the rooms than the system is moving, usually because of a restriction or a leak between the blower and the vent. Finding where the air is lost comes before replacing equipment.
In Las Vegas, most of that path is overhead. Ducts here commonly run through attics that get extremely hot in summer, and flex duct can sag, kink or pull off a boot over time. ENERGY STAR says a typical house loses about 20 to 30 percent of the air moving through its ducts to leaks, holes and poor connections, and lists ducts in an attic and kinked flex duct as warning signs. A Department of Energy field guide adds that flex duct is often squeezed by hangers or tight bends, and that a dirty cooling coil or blower setup can restrict airflow too.
Where weak airflow usually comes from
- Crushed, kinked or disconnected duct runs
- Leaky supply or return connections
- A dirty or blocked indoor coil
- Blower motor or blower setting problems
- Too little return air for the system
If every room is weak, the equipment is the first suspect, and the AC diagnostic visit checks the blower and coil. If one room or one floor lags, the ductwork problems guide explains the duct-side signs.
Weak airflow FAQ
Why is the airflow from my vents so weak?
Usually a restriction or leak between the blower and the vent: a crushed or disconnected duct, a dirty coil or a blower problem. Book online or call (702) 738-6976 to schedule.
Can weak airflow make my AC look broken?
Yes. ENERGY STAR says airflow problems can cut a system's efficiency by up to 15 percent, so the house can stay warm while the equipment itself is working.
Why are attic ducts a problem in Las Vegas?
Because summer attics here get very hot. ENERGY STAR names ducts in an attic as a sign of poor duct performance, and a leak there spills cooled air into the hottest part of the house.
Is one weak room a duct problem or an equipment problem?
Usually a duct problem. When one room lags and the rest of the house is fine, the run serving that room is the first place to look.
Does weak airflow mean I need new ducts?
No. Many problems are one failed run or connection. Duct work starts by finding that run, not by replacing the whole system.
How do you seal leaky ducts?
We seal leaking joints and seams with mastic or metal-backed foil tape, the materials ENERGY STAR recommends, not cloth duct tape. Disconnected runs are reattached and strapped, and torn flex duct is replaced section by section. Sealing focuses on the runs that are actually losing air. Book online or call (702) 738-6976 to schedule.
Can you add a return duct to a room that always feels stuffy?
Often, yes. A closed bedroom with no return can't push its air back to the system, so it gets stale and warm. We added a return duct in ZIP 89002 in August 2025 and a jumper duct in ZIP 89044 in July 2025. We confirm the room's airflow before adding a run.
What is a plenum, and can it leak?
The plenum is the box where ducts connect to the furnace or air handler, one on the supply side and one on the return. Because all the air passes through it, a gap there wastes more air than a leak in a single run. We repair and seal plenum joints along with the ducts.
What to do next
Call (702) 738-6976 or Book Online. Open 24 hours, 7 days, including emergencies. License 0092120. Leave a Google review after a completed visit.
Colton Air Conditioning · Colton Mechanical LLC · License 0092120 · (702) 738-6976 · Mailing address: 6545 S. Fort Apache Rd Ste 135 #467, Las Vegas, NV 89148