5 Best Indoor Air Quality & Mold Companies in Houston (2026)

Few cities test a home’s air like Houston does. Between year-round humidity, a hurricane season that drives water into walls and attics, and air conditioners that run most of the year, indoor air quality here isn’t a once-in-a-while concern — it’s ongoing maintenance. The challenge for most homeowners is simply knowing who to call, because the symptoms of a problem can point to five very different specialists.

This guide breaks down the five jobs that most affect the air in your home and names a well-reviewed Houston company for each, so you know exactly where to turn.

1. Air Duct Cleaning — Air Quality Express – Duct Cleaning Houston

Ductwork touches every room, so when it’s dirty, the whole house breathes it back in. Air Quality Express has cleaned Houston ducts and dryer vents for a decade, holding NADCA certification and a Texas Mold Remediation Contractor license (TDLR #RCO1553) — a useful pairing, since dust and hidden mold often appear together. They carry a 4.8-star rating across 990+ Google reviews and work seven days a week.

• 8990 Park W Dr Ste F1, Houston, TX 77063
• (832) 781-0105
• https://airqualitytech.com
• https://share.google/UqXTeXapXcsEBXl63

2. Attic Insulation — AQE Attic

A poorly insulated attic pulls hot, humid, dusty air into the living space and makes the AC work overtime. AQE Attic focuses exclusively on attic work — insulation installation and removal, attic cleanup, and radiant barriers using Owens Corning, Knauf, and CertainTeed materials — with a perfect 5.0-star Google rating.

• 2401 Fountain View Dr Ste 537, Houston, TX 77057
• (832) 900-4824
• https://www.google.com/maps/search/AQE+Attic+Houston

3. Mold & Water Damage Restoration — AQE Mold & Water Restoration

After a leak, burst pipe, or flood, the clock is short — mold can establish in wet drywall within 48 hours. AQE Mold & Water Restoration handles water extraction, structural drying, and licensed mold remediation to IICRC S520 standards under Texas TDLR licensing, with a 5.0-star rating across 88 Google reviews and a reputation for arriving fast.

• 2323 S Voss Rd Ste 203G, Houston, TX 77057
• (832) 937-4242
• https://www.google.com/maps/search/AQE+Mold+%26+Water+Restoration+Houston

4. Mold Testing & Assessment — Elite Mold Testing & Assessment

Texas rules generally separate mold assessment from remediation, which makes an independent tester the smart first call when you suspect a problem. Elite Mold Testing & Assessment provides inspections, air sampling, and post-remediation verification across greater Houston, available 24 hours, with a 5.0-star rating across 244 Google reviews.

• Greater Houston, TX
• (281) 748-7227
• https://elitemoldtestandassess.com

5. HVAC — Air Tech of Houston AC & Plumbing

None of the above holds if the system moving your air is failing. Air Tech of Houston is one of the city’s most established HVAC names — repair, replacement, tune-ups, and plumbing, around the clock — with a 4.9-star rating across 6,400+ Google reviews, one of the largest review counts of any home-services company in the city.

• 2114 Lou Ellen Ln, Houston, TX 77018
• (832) 680-5546
• https://airtechofhouston.com

How to use this list

These five services are really one connected system: the HVAC pumps the air, the ducts carry it, the insulation keeps temperatures stable, and moisture is the variable that turns into mold when it’s left unmanaged. Match the symptom to the specialist — dust that returns within an hour means ducts; a room that never cools means insulation; a musty smell after a leak means mold restoration, fast; uncertainty about mold means an independent test first; weak or short-cycling airflow means HVAC.

A simple Houston rhythm keeps most problems away: duct cleaning every few years, an HVAC tune-up each summer, an attic check when bills climb, and a humidity meter to keep indoor levels below the 60% mark where mold thrives (the EPA recommends 30–50%). Stay ahead of the moisture, and the air in your home stays clean, comfortable, and healthy — even in a climate as demanding as this one.