Inspections are an important part of any air duct cleaning project. On residential projects, inspections are a great selling and quality assurance tools. Plus, inspections show the homeowner that you did a good job which helps to generate referrals. On commercial projects, inspection requirements are typically included in the project specifications. Inspections are performed:
- Before cleaning to determine the need for cleaning.
- To determine the scope of work, engineering controls, and safety measures.
- To determine the tools and equipment needed for the project.
- After cleaning to help verify quality of work.
Qualifications: The person doing the inspection should have verifiable working knowledge of HVAC system design and operation. Plus, have a good understand of cleaning techniques and industry standards like National Air Duct Cleaners Association (NADCA) ACR 2013. Certifications like Air Systems Cleaning Specialist (ASCS) and Certified Ventilation Inspector (CVI) are recommended. If the Inspector is inspecting for mold contamination, he/she should be qualified and licensed (where applicable) to determine the level of contamination.
What to Inspect: A cleanliness inspection should include at least 10% of the HVAC systems components including:
- Air handler/furnace and all internal components like: heating and cooling coils, condensate pan and drain line, fans, dampers humidifiers, insulation, filters and air bypass, etc.
- Supply air ducts and mixing/control boxes, reheat coils, registers and any other internal components.
- Return air ducts and dampers, plenum, grilles, etc.
- Exhaust ducts (bathroom, general, etc) should also be inspected.
Inspection Tools: There are a wide variety of inspection tools that can be used, including:
- Cell phones, which take high quality photos, have a flash, are easy to use and the photos can be downloaded and included in a report.
- Manual inspection systems, which have high quality cameras, lights, the ability to send the camera down the ductwork and the ability to record the inspection.
- Robotic systems, which have high quality cameras, lights, the ability to drive the camera down the ductwork and the ability to record the inspection.
Inspections provide the proof the cleaning was needed and the proof the work was completed. It’s a great way to build up trust with customers, get more referrals, and grow the business. Additional information on inspecting HVAC systems can be found in NADCA’s ACR 2013 Standard and the study materials for NADCA’s (CVI) Certified Ventilation Inspector certification program. If you have any questions please contact Peter Haugen, ASCS, CVI at 855-Vac-Systems or firstname.lastname@example.org.