Testing and assessment services, with a clear line between independent assessment and testing sold by the company that would perform the remediation.
Indoor Air Quality Testing in Dallas, TX is shaped by conditions that do not apply everywhere. Long cooling seasons and heavy spring tree pollen mean North Texas systems run more hours per year than almost anywhere else in the country. Filter bypass around loose-fitting return grilles is the dominant complaint, and it is a duct-sealing problem as much as a cleaning one.
Whoever you shortlist in Dallas, the thing to establish before you book is whether the party interpreting the result also sells the remedy, and what instrument or laboratory method stands behind the number. Get the answer in writing on the quote rather than over the phone, because it is the detail that most often separates the price you were told from the price you pay.
We are still building out this part of the directory. If you know a company that belongs here, tell us.