We hired Indoor Air Quality Solutions, IAQS to assess a situation that we had concerns about. They did exactly what they said they would do at the price they quoted. I'm happy with their performance. They knew what they were doing. They used equipment that gave them accurate information. Then they explained in detail what was wrong. In addition to their initial findings, they made some suggestions about what they would do and provided a written report. I recommend Indoor Air Quality Solutions, IAQS.