Short answer：Air-cleaning equipment does not guarantee property appreciation or replace ventilation and source control. Identify the pollutant before assessing capability, operating conditions and maintenance.
Look beyond an advertised efficiency
Performance under a laboratory condition is not whole-home performance in daily use. Check space suitability, filter type, noise, energy and replacements; particle and gas removal are not interchangeable claims.
Address sources and operation
Official IAQ guidance combines source control, appropriate ventilation and cleaning. Review materials, smoking, damp and maintenance rather than treating equipment as a health or resale guarantee.
Before deciding
- Request test conditions and scope
- Include filters and electricity
- Do not substitute equipment for source control
Sources and method
Sources support the specific rules described. Checklists and hypothetical calculations are editorial explanations, not measured market results or individual approvals.
Revision：Removed unsupported experience, case outcomes and statistics; corrected the topic-specific rules and limitations described above.
Scope：General information only, not personalised legal, tax, immigration, admissions or investment advice.