Most people think of air pollution as an outdoor problem — smog, exhaust, wildfire smoke. But according to the EPA, the air inside your home can be two to five times more polluted than the air outside. For families spending most of their time indoors, that's a serious concern.

At Cory Butts Electric & AC LLC, we hold Certified Indoor Air Quality Expert credentials — which means we don't just install and repair HVAC systems. We're trained to assess, diagnose, and improve the quality of the air your family breathes every day.

Here's what you need to know.

What Is Indoor Air Quality?

Indoor air quality (IAQ) refers to the condition of the air inside your home — specifically how it affects the health and comfort of the people who live there. Good IAQ means the air is free of harmful pollutants, properly humidified, and well-circulated. Poor IAQ means the opposite.

Common indoor air pollutants include:

• Dust and dust mites — found in carpets, bedding, and upholstery
• Pet dander — microscopic skin flakes shed by animals
• Mold and mildew spores — thrive in humid environments, especially in bathrooms and around HVAC systems
• Pollen — enters through windows, doors, and on clothing
• Volatile organic compounds (VOCs) — off-gassed by paints, cleaning products, furniture, and building materials
• Carbon monoxide — produced by gas appliances, fireplaces, and attached garages
• Bacteria and viruses — can circulate through your HVAC system if not properly filtered

How Your HVAC System Affects Air Quality

Your heating and cooling system is the lungs of your home. It circulates air through every room — which means it can either improve your air quality or make it worse, depending on its condition.

A well-maintained system with clean filters and ducts helps remove pollutants from the air as it circulates. A neglected system — with dirty filters, dusty ducts, or mold growth near the coils — can actively spread contaminants throughout your home.

This is why regular HVAC maintenance isn't just about comfort and efficiency. It's about health.

Signs Your Indoor Air Quality May Be Poor

You may not be able to see air quality problems, but you can often feel them. Watch for:

• Allergy or asthma symptoms that are worse indoors than outside
• Frequent headaches, fatigue, or difficulty concentrating — sometimes called "sick building syndrome"
• Musty or stale odors that don't go away with cleaning
• Visible dust buildup on vents, registers, or furniture shortly after cleaning
• Humidity problems — air that feels too dry (causing dry skin, static electricity, and cracked wood) or too humid (causing condensation, mold, and that sticky feeling)
• Respiratory irritation — coughing, sneezing, or itchy eyes that improve when you leave the house

What a Certified Indoor Air Quality Expert Can Do

As Certified Indoor Air Quality Experts, we go beyond standard HVAC service to address the root causes of poor air quality in your home. Here's what that looks like in practice:

Professional Duct Cleaning and Disinfecting

Over time, your ductwork accumulates dust, debris, pet dander, mold spores, and other contaminants. Every time your system runs, it pushes that buildup through your home. Professional duct cleaning removes the accumulated debris and disinfects the ductwork to eliminate mold and bacteria.

Most homes benefit from duct cleaning every 3–5 years — sooner if you've had recent construction, a pest problem, or visible mold near your vents.

Whole-Home Air Purification

Standard HVAC filters capture large particles but do little against bacteria, viruses, VOCs, and fine particulates. Whole-home air purifiers — installed directly in your HVAC system — provide a much higher level of filtration for every cubic foot of air that passes through your system.

Options include HEPA-style media filters, electronic air cleaners, and UV germicidal lights that kill bacteria and mold at the source.

UV Germicidal Lights

UV lights installed near your evaporator coil kill mold, bacteria, and viruses before they can circulate through your home. They're particularly effective at preventing mold growth on the coil itself — a common problem in humid Texas climates.

Humidity Control

Texas weather swings between dry winters and humid summers, and both extremes affect your air quality and comfort. Whole-home humidifiers and dehumidifiers work with your HVAC system to maintain optimal humidity levels (between 30–50%) year-round.

Filter Upgrades

Not all air filters are created equal. We can help you choose the right filter for your system — one that captures more pollutants without restricting airflow to the point of reducing efficiency.

The Hill Country Advantage (and Challenge)

Living in the Texas Hill Country means beautiful scenery, wide open spaces, and — during certain seasons — significant allergen loads from cedar, oak, and grass pollen. Cedar fever is a real phenomenon here, and it can make indoor air quality especially important for allergy sufferers.

We understand the specific air quality challenges of this region, and we tailor our recommendations accordingly.

Take Control of Your Home's Air

You can't control the air outside, but you can control what your family breathes inside. Whether you're dealing with allergy symptoms, musty odors, or just want the peace of mind that comes with clean air, we're here to help.

Call or text us at 512-556-6818 to schedule an indoor air quality assessment. We serve Lampasas, Burnet, Llano, Mason, San Saba, and the surrounding Texas Hill Country.