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HomeAdvisor Screened & Approved

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Learn about our screening process

100% Recommended

21 Years In Business

Company Details


6443 Marquette Ave
Saint Louis, MO 63139


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Service Details

  • Residential Work
  • Commercial Work

Areas of Expertise

  • Indoor Air Quality
  • Testing Mold
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Cost Information

  • Free Estimates
  • Credit Cards Accepted


5 Verified Reviews
  • 5
  • 4
  • 3
  • 2
  • 1

Highly rated for

  • Quality
  • Value
  • Customer Service
Showing 1-5 of 5 reviews Showing 0 reviews
4.5 Stacey K. Saint Louis, MO

There was mold in the house. William took the time to help remove it from the wall, give advice on how to keep it away and installed 2 Aerus units.

5.0 Ronald ..

Will is the reason I bought my system. He was direct and to the point, but likable. His knowledge on the product and straightforwardness was great.

5.0 Samuel M. Saint Louis, MO

We were having some issues with a smell in our house, so we called William. One of our friends recommended him. When he came out and tested our air quality, it was tested very badly. We took his advice and put in the system. Well now our house house doesn't have the smell anymore and I can breathe much easier. We want to thank William for coming out so quickly to fix this issue. We recommended anyone that has family members with family members with health issues to try this unit.

5.0 Debra G. Saint Louis, MO

I worked with William. He was very professional and I was very comfortable with him throughout the entire process. I had suspected I had a mold issue. When I reached out to Mr. Sinon at Aerus air quality he showed up the same day for me. After he diagnosed my home situation for mold, allergens, and bacteria he set me up to install the Beyond Guardians Air Scrubber. What a difference! My son and daughter both noticed the difference. Not only do I noticed the change and no more scratchy throat but this thing also eliminates Covid-19. That is a huge bonus. Seriously feels good to take care of my family.


William, great guy, came out to test my indoor air quality. We had elevated particle pollution - pretty alarming. William installed a BEYOND GUARDIAN AIR UNIT and since then the air quality and overall health of the home has DRASTICALLY improved.

HomeAdvisor allows Service Professionals to post information about themselves and their business on their profile. HomeAdvisor does not review or verify the information representations set forth in those profiles as they are self-reported by the Service Professional.

HomeAdvisor verifies state-level licensing where applicable - note: some states require local or county level licensing and you should verify whether or not your pro is properly licensed.
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Seal of Approval

What is the screening process that Service Professionals go through in order to become members of the HomeAdvisor network?

  1. Verify Trade License
    HomeAdvisor checks to see if the business carries the appropriate state-level license.
  2. Verify Insurance
    As a part of our screening process, we encourage professionals to carry general liability insurance. We require coverage for hundreds of services.
  3. Verification of State Business Filings
    For business types that require a Secretary of State filing, we confirm that the business is in good standing in the state in which it is located.
  4. Criminal Records Search
    HomeAdvisor uses 3rd party data sources to conduct a criminal search for any relevant criminal activity associated with the owner/principal of the business.
  5. Sex Offender Search
    We confirm that the owner/principal is not listed on the official state Sex Offender web site in the state in which the owner/principal of the company is located.
  6. Bankruptcy Search
    We use 3rd party data sources to check the history of the principal/owner of the business for bankruptcy filings by or against them.
  7. Legal Search for Civil Judgments
    We use 3rd party data sources to check the principal/owner of the business for state level civil legal judgments entered against them.
  8. Liens Search
    We use 3rd party data sources to check the principal/owner of the business for liens placed against them.
  9. Identity Verification (SSN)
    HomeAdvisor verifies the social security number(s) of the owner/principal for identity check purposes. This check applies primarily to smaller business entities.
  10. Identity Verification (Reverse Phone Lookup)
    We conduct a reverse business phone lookup to identify records matching the phone number information provided by the business.

NOTE: Member service professional information confirmed as described above may change or expire over time; while HomeAdvisor attempts to maintain accurate and up-to-date information, and confirms changes when notified, we cannot guarantee that profile and screening information is accurate. Therefore, we recommend that before working with a service professional you verify that information presented is still current and/or acceptable to you.
Please see HomeAdvisor's Terms and Conditions for a full description of how we screen Service Professionals

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