Inspection standard
Strong proposals show the condition in context and explain uncertainty. Weak proposals begin with a package before looking at the system.
Hiring reading 37
Compare evidence and methods, not superlatives
Review inspection standard, then connect the observation to its source, system location, and a written scope.
DIRECT ANSWER
Start with the condition, not the sales package
A provider comparison should focus on the system you have and the concern you observed. EPA advises consumers not to accept sweeping health claims, routine-cleaning pressure, or claims that EPA certifies duct-cleaning companies. Ask each provider to explain the evidence, full system scope, material-specific method, containment, products, and verification.
A badge or association name can be one data point, not a substitute for checking the exact person or business. Verify licensing when the proposed California work requires it, and read written terms before scheduling.
READ THE AIR PATH
What deserves a closer look
Method fit
Ask how tools change for metal, flex, and fiberglass. One aggressive method for every section is a warning sign.
Business verification
Confirm the business name, contact information, insurance if relevant, complaint history, and license information directly with authoritative sources.
USE THIS SEQUENCE
Move from observation to a written decision
Use one comparison sheet
Give providers the same questions and system notes.
Score evidence and scope
Put more weight on clarity than on dramatic claims.
Verify independently
Check licenses and references rather than relying on a logo.
Review terms
Understand cancellation, access, damage, add-ons, payment, and correction procedures.
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.