Service illustration · not a completed customer projectTHE WORK, EXPLAINED
Start with the condition.
Understand the scope.
Have the filter specification, holder and fit assessed against the equipment information. Ask which gaps or damage were observed and whether the proposed work is filter replacement, holder repair or another correction. Confirm the completed fit checks and maintenance information without assuming a filter change resolves every system concern.
What may be involved
- filter holder
- filter
- gaskets
- access door
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 / San Mateo
Building history
Successful subdivision of the Howard estate in 1889 opened smaller plots and brought middle-class residents; the town incorporated in 1894.
Source ↗Local exposure
The Crystal Springs Gap lets summer maritime air cool the corridor from San Mateo to Redwood City.
Source ↗Local context
Where duct or HVAC work is permitted in California, independent field verification can be part of closing the permit. The California Energy Commission's Home Energy Rating System page says that depending on the work being done HERS testing may be mandatory and that properly permitted work will trigger any necessary testing, that a homeowner has the right to find and hire a rater who is independent of the contractor, and that suspected asbestos in duct insulation or sealing can exempt some tests, including duct leakage testing. Ask early whether the proposed scope is cleaning alone or work that would trigger verification.
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.
