Service illustration · not a completed customer projectTHE WORK, EXPLAINED
Start with the condition.
Understand the scope.
Ask which accessible system components will be assessed and how observed conditions and access limits will be recorded. EPA recommends considering cleaning in response to specific conditions rather than as a routine service. Keep any cleaning or replacement proposal separate from the assessment findings.
What may be involved
- supply ducts
- return ducts
- registers
- air handler
Ask the provider to distinguish existing parts to inspect, proposed replacements, and tools, materials or reports included in the service. Confirm the work and exclusions after assessment; this list does not mean that every item will be supplied or replaced.
LOCAL RESEARCH / Potrero Hill
Housing context
Planning identifies this area among neighborhoods containing RH-1 one-family residential zoning, so individual-home hardware is part of the local mix.
Source ↗Local context
The Showplace Square/Potrero Hill Area Plan describes historic brick buildings and production businesses in Showplace Square, mixed-use development at the base of the hill, and a predominantly residential character on Potrero Hill. These adjoining settings do not establish the age or condition of a property’s equipment.
Source ↗Planning your work
Duct cleaning is not usually construction work, but replacing, altering or reconnecting ductwork or air-handling equipment can be. The Contractors State License Board's consumer page on building permits sets out the California Building Standards Code position that work may not be erected, altered, repaired or demolished without a permit first obtained from the building official, and says code requirements vary between cities and counties. Ask which parts of the proposed scope are cleaning and which are alteration, then check with the building department for the address.
Source ↗Area-wide context does not establish the condition of your property or equipment.
Before the visit
Building age and weather cannot establish duct contamination. The system itself needs to be inspected.
