Pioneering Clean Air Since 1998
for the Way You Work
Patented NCCO air purification technology for commercial and industrial facilities across North America.
Born in a University Lab. Proven in the Field.
Founded in Hong Kong in 1998, RHT Industries Limited is a pioneering leader in indoor air quality solutions powered by patented NCCO (Nano-Confined Catalytic Oxidation) technology.
With over 25 years of innovation, we serve commercial, industrial, and residential clients across healthcare, banking, hospitality, and public sectors.
Our systems are backed by ISO 9001/14001 certifications, UL/ETL safety approvals, and third-party lab-verified performance data.
RHT is committed to delivering cleaner air while advancing ESG goals through energy-efficient, carbon-reducing technologies.
Today, NCCO systems operate across healthcare, banking, transportation, and government sectors worldwide — with growing deployment throughout the United States and Canada.
Why NCCO Outperforms Every Filter on the Market
Most air purifiers rely on physical filtration — capturing particles until the media clogs and stops working. NCCO takes a fundamentally different approach.
Nano
Zeolite minerals with nano-scale pores create over 400 feet of adsorption tunnels per granule, selectively trapping pollutant molecules by size and shape.
Confined
The zeolite's crystalline pore structure acts as a shape-selective trap. Only targeted contaminant molecules fit — precision molecular targeting with no wasted capacity.
Catalytic
Transition metals embedded inside the zeolite pores accelerate chemical reactions between trapped pollutants and active oxygen — breaking contaminants down at the molecular level.
Oxidation
Active oxygen generated within the system oxidizes gaseous contaminants into harmless H₂O and CO₂. The catalytic material regenerates, ready for the next adsorption cycle. No ozone generation. No toxic byproducts.
NCCO performance is validated through independent laboratory testing, with certified test reports covering virus removal, bacteria elimination, formaldehyde reduction, and TVOC removal.
Sustainability Is Not a Buzzword. It Is Our Engineering Philosophy.
To protect human health and the environment through innovative, science-backed air purification technology that is energy-efficient, sustainable, and accessible to every indoor space.
By replacing disposable activated carbon with a self-regenerating catalytic reactor, NCCO systems reduce consumable waste and cut long-term operating costs.
Our commitment to environmental responsibility is backed by third-party verification. NCCO technology holds carbon footprint verification and carbon credit certification through internationally recognized bodies.
Verified Credentials
- ISO 9001:2015 — Quality Management System
- ISO 14001:2015 — Environmental Management System
- Carbon Footprint Verification
Milestones
RHT Industries Limited established in Hong Kong as a member of the HKUST Entrepreneurship Program, focused on air purification research.
NCCO technology commercialized. First government and public sector deployments in Hong Kong.
NCCO (Nano-Confined Catalytic Oxidation) technology patented — international patents granted in China and Japan.
Philips partnership signed — 420,000+ units licensed globally. HSBC, MTR, and IFC adopt NCCO.
Expansion into China and Canada markets. Industrial and medical network established.
Dongfeng Nissan, Poly Real Estate, and Shanghai Xintiandi installations. Taiwan and Singapore distribution.
Westinghouse NCCO air purifier launched in USA. Anti-epidemic Technology Product Award.
Carbon credit certificates issued by CMA and GCTC — 4,412.99 metric tonnes CO2e retired.
Certifications & Awards
Certifications
- ISO 9001:2015 — Quality Management System
- ISO 14001:2015 — Environmental Management System
- Electrical Safety Certification — Intertek/ETL
- CE Marking — European Conformity
- NCCO Patented Technology
- Carbon Footprint Verification
- Formaldehyde Removal Test Report
- TVOC Removal Test Report
- Bacteria Removal Test Report
- H1N1 Virus Removal Test Report
Awards
- Hong Kong Emerging Brand Award — Hong Kong Brand Development Council (2019)
- Home Best Brand Awards (2020)
- Best Air Purification System — Asian Interior Design / Home Journal (2020)
- Anti-epidemic Technology Product Award — HK Retail Technology Association (2020)
- Best Technology Innovation Award — 1st Greater Bay Area Outstanding Young Entrepreneurs (2020)
- ZOL e-commerce Industry Innovation Award — ZOL (2020)
Ready to Improve Your Facility's Air Quality?
Tell us about your space and requirements. Our engineering team will recommend the optimal NCCO configuration for your building.