GB/T 18801 CADR Testing for Gaseous Pollutants
Air Cleaner Performance Testing – Annex C (Normative)
The iAIR Labs provides independent, third-party laboratory testing to GB/T 18801 (September 2015), Annex C – Test Method for Clean Air Delivery Rate (CADR) of Gaseous Pollutants, supporting manufacturers seeking credible, defensible performance data for air cleaners, air purification technologies, and gas-phase filtration systems.
We test prototype through production-ready devices in controlled environmental chambers using representative gaseous challenges such as formaldehyde, toluene, and d-limonene, delivering high-quality data suitable for:
Product development & optimization
Regulatory submissions
China market entry support
Marketing claims substantiation
Comparative benchmarking
Why GB/T 18801 CADR Testing Matters
China’s GB/T 18801 standard is one of the most widely referenced air cleaner performance standards globally. Annex C establishes a rigorous, quantitative method for determining how effectively an air cleaner removes volatile organic compounds (VOCs) and other gaseous pollutants from indoor air.
High-quality Annex C testing allows manufacturers to:
Demonstrate real-world gas-phase removal performance
Quantify CADR for gaseous pollutants
Support credible product labeling and datasheets
Differentiate products in highly competitive air cleaner markets
Airmid’s expertise in aerobiology, exposure science, and environmental chamber testing ensures your data stands up to scientific, regulatory, and commercial scrutiny.
Our GB/T 18801 Annex C Testing Capability
At Airmid Healthgroup, GB/T 18801 Annex C testing is conducted using purpose-built, well-characterized environmental chambers and validated analytical workflows.
Typical Test Configuration
Chamber volume: 1 m³ (suitable for prototype and benchtop systems)
Test duration: 8 hours
Challenge gases:
Formaldehyde
Toluene
d-Limonene
Analytical sensitivity:
2 ppb (toluene, d-limonene)
5 ppb (formaldehyde)
Example Performance Outcome
During testing, devices have demonstrated removal of all three challenge compounds to below analytical detection limits, providing strong evidence of gas-phase pollutant control effectiveness
Environmental Chamber Testing Infrastructure
Our chambers are designed to support precise control of:
GBT 18801 CADR Testing for Gaseous Pollutants Air Cleaner Performance TestingTemperature
Relative humidity
Air mixing & homogeneity
Pollutant injection and decay profiling
This infrastructure enables repeatable, defensible CADR calculations and robust statistical treatment of results.
What We Deliver
Every GB/T 18801 Annex C project includes:
Detailed test protocol aligned to the standard
Chamber conditions and calibration records
Pollutant concentration vs. time profiles
Calculated CADR values for each gas
Executive summary of results
Final signed test report suitable for regulatory and commercial use
Optional add-ons:
Replicate testing
Comparative product benchmarking
Extended pollutant panels
Product optimization support
Who This Service Is For
Air cleaner & air purifier manufacturers
Gas-phase filter developers
Activated carbon & sorbent material suppliers
Appliance OEMs & ODMs
Brands entering or expanding in China and Asia-Pacific markets
Why Airmid Healthgroup
Preeminent aerobiology & exposure science laboratory
Deep experience across air, surface, and material performance testing
Trusted by global brands, startups, and standards bodies
Integrated support from early R&D through commercialization
We don’t simply run tests — we partner with your team to ensure your performance claims are scientifically robust, commercially meaningful, and regulator-ready.
Typical Project Flow
- Technical consultation & scope definition
- Device intake & pre-test check
- Chamber testing to GB/T 18801 Annex
- Data analysis & CADR calculation
- Draft report review
- Final signed report issued
Frequently Asked Questions
Is GB/T 18801 required for China market entry?
Often yes, depending on product category and claim type. We can advise on typical pathways.
Can prototypes be tested?
Yes. Our 1 m³ chamber is ideal for early-stage and prototype technologies.
Can we test additional gases?
Yes. Custom pollutant panels can be added.
How long does testing take?
Typical projects complete within 2–4 weeks, depending on scope.
Related Services
Antimicrobial Surface & Material Testing
UV-C Air Disinfection Efficacy Testing
Speak With Our Team
If you are developing or commercializing air cleaning technologies and need GB/T 18801 Annex C CADR data, we would be delighted to discuss your project.
👉 Contact Airmid Healthgroup to scope your GB/T 18801 testing program.