Inspect before selecting a process
Dust on a register is not enough information to choose an entire-system treatment. Ask what was observed inside the ducts, what material the ducts are made of, and whether moisture or physical damage is involved.
Cleaning and repair are different
A disconnected run, wet insulation, or damaged duct may need repair or replacement. Cleaning cannot restore a missing connection. The proposal should distinguish each type of work and its intended purpose.
Ask what is included
Clarify access, areas addressed, materials proposed, and any limits of the method. A treatment service is not automatically the same scope as mechanical cleaning. Confirm the method available for your system with S&S.
Avoid a blanket promise
Routine duct cleaning is not a universal answer to household air-quality concerns. EPA’s consumer guidance is a useful starting point for evaluating recommendations. Ask for evidence of the condition and the reason for the work.
Request evidence before authorizing whole-system cleaning
EPA does not recommend routine duct cleaning as a universal preventive service. Its guidance identifies situations worth investigation, including substantial visible contamination, vermin and excessive debris being released. Ask the provider to show the condition and distinguish observation from a confirmed diagnosis.
The proposed method should suit the duct material and condition. Wet or moldy insulation may need replacement rather than cleaning, and the cause of moisture must be addressed. A dusty return grille alone does not establish that every duct requires treatment.
- Which components were inspected, and what could not be accessed?
- What photos or findings support the recommended work?
- Does the scope address the affected system components or only selected sections?
- How will cleaning protect the home and the duct materials?
- What underlying moisture or damage needs separate correction?
Further reading
EPA consumer guidance on duct cleaning
General homeowner information from S&S HVAC. Equipment instructions and the approved project scope govern work on your system. Source links support the guidance; they do not imply a manufacturer endorsement.