Particles
Mechanical filters and HEPA portable cleaners can collect airborne particles when sized, placed, and maintained correctly. Duct cleaning does not continuously filter room air.
Decision reading 35
Air cleaners, filters, and duct cleaning solve different jobs
Review particles, then connect the observation to its source, system location, and a written scope.
DIRECT ANSWER
Start with the condition, not the sales package
Source control removes or reduces what creates pollution. Ventilation exchanges indoor and outdoor air when conditions permit. Central filters treat air moving through the HVAC system. Portable air cleaners treat air in a room. Duct cleaning removes selected deposits from system surfaces when evidence supports it. None is a universal replacement for the others.
CARB recommends mechanical filtration and warns against ozone generators. EPA says duct cleaning is generally an as-needed decision. Start by naming the pollutant, source, room or system pathway, and desired outcome.
READ THE AIR PATH
What deserves a closer look
Gases and odors
Particle filters do not remove every gas. Activated carbon can help with some gases, while source removal and safe ventilation may matter more.
Surface deposits
A verified deposit inside a component may support cleaning, repair, or replacement. The service should be matched to material and cause.
USE THIS SEQUENCE
Move from observation to a written decision
Identify the concern
Particle, gas, odor source, moisture, pest debris, or equipment condition.
Control the source
Stop smoke, water, pest entry, or renovation dust where possible.
Choose the pathway tool
Use room filtration, central filtration, ventilation, HVAC service, or duct evaluation as evidence supports.
Measure success honestly
Look for the defined condition rather than a general promise of pure air.
CALL PATH
Ask about the evidence and the written scope
Sunnyvale Airflow Guide is an independent lead-generation website, not an air duct cleaning company. Calls may connect you with an independent service provider. Service availability, qualifications, pricing, and terms must be confirmed directly with that provider.