Out of sight, out of mind — that's how most homeowners think about their ductwork. But the network of ducts running through your walls, floors, and ceilings plays a critical role in both your home's air quality and your HVAC system's efficiency. When those ducts are dirty, everything suffers.

As Certified Indoor Air Quality Experts, we perform professional air duct cleaning and disinfecting throughout Lampasas and the Texas Hill Country. Here's what you need to know.

What Is Air Duct Cleaning?

Air duct cleaning is the process of removing accumulated dust, debris, and contaminants from your home's ductwork — the supply ducts that deliver conditioned air to each room, the return ducts that pull air back to the system, and the registers and grilles at each opening.

Professional duct cleaning uses specialized equipment including high-powered vacuums, rotary brushes, and compressed air tools to dislodge and remove buildup from inside the ducts. It's a different process from simply vacuuming the visible part of a register — it addresses the entire duct system.

A thorough cleaning also includes the air handler, evaporator coil housing, and drain pan — areas where mold and bacteria can grow if moisture is present.

What Builds Up in Your Ducts?

Over time, your ductwork can accumulate:

• Dust and debris — tracked in from outside, shed from occupants, and generated by everyday activities
• Pet dander — microscopic skin flakes that circulate through the system
• Mold and mildew — especially in humid climates or homes with moisture problems
• Pollen — particularly relevant in the Texas Hill Country during cedar and oak seasons
• Insulation particles — if duct insulation is deteriorating
• Pest debris — in homes where rodents or insects have accessed the ductwork
• Construction dust — after any renovation or remodeling work

Every time your HVAC system runs, it pulls air through these ducts and distributes whatever is in them throughout your home.

Signs Your Ducts May Need Cleaning

Visible Dust Around Registers

If you notice dust blowing out of your vents when the system kicks on, or heavy dust buildup on the register covers, it's a sign that the ducts themselves are dirty.

Musty or Stale Odors

A musty smell that seems to come from your vents — especially when the system first turns on — often indicates mold or mildew growth somewhere in the duct system.

Worsening Allergy or Asthma Symptoms

If household members are experiencing more frequent allergy symptoms, respiratory irritation, or asthma flare-ups indoors, dirty ducts may be a contributing factor.

Uneven Airflow Between Rooms

Significant buildup in certain sections of ductwork can restrict airflow, causing some rooms to receive less conditioned air than others.

Recent Construction or Renovation

Construction generates enormous amounts of fine dust and debris. Even with precautions, some of it inevitably ends up in your ductwork. A post-construction duct cleaning is strongly recommended after any significant remodeling project.

You've Never Had It Done

If you've lived in your home for several years and have never had the ducts cleaned — or if you're moving into a home and don't know its history — it's worth having an inspection and cleaning done.

How Often Should You Have Your Ducts Cleaned?

The National Air Duct Cleaners Association (NADCA) recommends having your ducts inspected every year and cleaned every 3–5 years for most homes. However, certain situations call for more frequent cleaning:

• Pets in the home — especially heavy shedders
• Household members with allergies or asthma
• Recent construction or renovation
• Evidence of pest activity in the ductwork
• Visible mold growth near vents or on the air handler
• Moving into a previously owned home

What to Expect During a Professional Duct Cleaning

Here's what a professional duct cleaning with Cory Butts Electric & AC looks like:

1. Inspection — We start by inspecting your duct system, including the air handler and coils, to assess the level of buildup and identify any issues like leaks, disconnected sections, or mold growth
2. Negative pressure setup — We connect a high-powered vacuum to your duct system to create negative pressure, which prevents debris from being released into your living space during cleaning
3. Agitation and removal — Using rotary brushes and compressed air tools, we dislodge buildup from the duct walls and pull it into the vacuum collection system
4. Disinfecting — We apply an EPA-registered antimicrobial treatment to eliminate mold, bacteria, and other biological contaminants
5. Final inspection — We inspect the system again to confirm it's clean and that all access points are properly sealed

The process typically takes 3–5 hours for a standard home, depending on the size and complexity of the duct system.

Duct Cleaning and Your HVAC Efficiency

Clean ducts don't just mean cleaner air — they also mean a more efficient HVAC system. When airflow is restricted by buildup, your system has to run longer to reach the set temperature, which increases energy consumption and wear on the equipment.

Regular duct cleaning, combined with filter changes and annual tune-ups, is one of the best ways to extend the life of your HVAC system and keep your energy bills in check.

Schedule Your Duct Cleaning Today

If it's been a few years since your last duct cleaning — or if you've never had it done — now is a great time to get on the schedule. We offer duct cleaning and disinfecting for both residential and commercial properties throughout the Hill Country.

Call or text us at 512-556-6818 to schedule your appointment. We serve Lampasas, Burnet, Llano, Mason, San Saba, and the surrounding Texas Hill Country.