4C A/C & Heating, LLC
Texas license: TACLB60872E (as listed on the company's website)
AirScouter › Katy › Indoor air quality
Indoor air quality in Katy, TX
Houston's humidity, pollen and hurricane-season moisture all affect the air inside your home. These local companies list indoor air quality services on their own websites. Compare 3 companies serving Katy, about 27 miles from downtown Houston.
Last updated September 2026
Quick answer
AirScouter lists 3 local companies that offer indoor air quality in Katy, TX, each checked against its own website (September 2026). High indoor humidity feels sticky and encourages mold. The EPA suggests keeping indoor humidity below 60%, ideally 30–50%. Compare the licensed HVAC companies listed and call one or two for a written estimate.
Local companies for indoor air quality in Katy
Airtec Air Conditioning & Heating LLC
Texas license: (as listed on the company's website)
Eddie's Heating and Air Conditioning
Texas license: TACLB54786E (as listed on the company's website)
Listed from each company's own website, where we checked name, phone, services and license number (September 2026). Listed in no particular order; this is not a ranking. Confirm details and ask for a written estimate before hiring.
What to know about indoor air quality in Katy
Katy has grown fast along I-10, and many homes in its master-planned communities are newer, often with the air handler in the attic. With the high summer temperatures out west of Houston, those attic units work hard, and a clogged condensate line is a common summer call. If your home is still under a builder or manufacturer warranty, check it before you book a repair.
- High indoor humidity feels sticky and encourages mold. The EPA suggests keeping indoor humidity below 60%, ideally 30–50%.
- A higher-rated air filter (MERV) catches more pollen and dust, but check that your system can handle it.
- After flooding or roof leaks, have ducts and the air handler inspected for mold.
- Ask whether a whole-home dehumidifier makes sense for your house.
Indoor air quality questions from Katy homeowners
Do I need duct cleaning?
Not on a set schedule. It can help after renovation dust, pests or water damage. Ask the company what they found before agreeing to it.
Why is my house humid even with the AC on?
An oversized AC, a dirty coil or airflow problems can leave humidity high. A technician can check.
How does AirScouter choose these companies?
Each company is listed from its own website, where we checked its name, phone number, services and license number (September 2026). The list is not a paid ranking. Sponsored listings, if any, will always be labeled.
Helpful guides
Indoor air quality in nearby cities
Not sure who to call?
Tell us what's going on and your ZIP, and we'll match you with nearby companies. Free for homeowners.
Scout a Pro