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Pioneering in Electricity-free Cooling Technology
Innovating Global Green Energy Solutions

Core Technology

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Featured in the Prestigious Journal Science

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Hong Kong's Top Scientific Transformation

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Industry-leading Cooling Performance

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Passive radiant cooling technology is inspired by Saharan silver ants and transmits surface thermal radiation to cold outer space (~3K) through the atmospheric window with a wavelength of 8-13μm.

Catalogue

All-round energy-efficient cooling solutions for low-carbon cities and green communities

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i2 Coating

Solar reflectivity up to 95%

Mid-infrared emissivity up to 95%
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i2 Film

Mid-infrared emissivity up to 94%

Visible light transmittance up to 75%

Infrared rejection up to 99.99%

Ultraviolet rejection up to 100%
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i2 Coating Auto

Electricity-free cooling technology
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i2 Ceramic

Electricity-free cooling technology
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i2 Textile

Electricity-free cooling technology
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Architecture

Improving Indoor Thermal Comfort While Reducing Energy Usage

Residence｜Shopping Mall｜Factory｜Warehouse｜Data Center｜Public Building

42.9

°C

Maximum surface temperature reduction

42

%

of air-conditioning energy reduction

Power & Telecom

Improving Operational Efficiency of Equipment, While Reducing Cooling Costs

Outdoor Equipment Cabinet｜Transformer｜Box Substation｜Communication Base Station｜Control Cabinet｜Machine Room Cooling Tower

38

°C

Maximum surface temperature reduction

14.9

°C

Indoor Temperature Reduction

New Energy

Improving Equipment Stability and Reducing O&M Costs

Energy Storage Cabinet｜Charging Station｜Wind Power Generation

34.8

°C

Surface Temperature Reduction

8.8

°C

Indoor Temperature Reduction

Logistics

Improving Transportation Quality and Optimizing Cold Chain Performance

Cold Chain Container｜Cold Chain Vehicle｜Tank Truck｜Ship

42.9

°C

Surface Temperature Reduction

15.4

°C

Indoor Temperature Reduction

Grain Storage

Preserving Grain Quality and Reducing Cooling Cost

Silo｜Flat-roofed Grain Silo｜Grain and Oil Storage Tank

30.9

°C

Surface Temperature Reduction

18.8

°C

Indoor Temperature Reduction

Photovoltaic

Improving Energy Conversion and Mitigating Heat Gain

Backplane｜Bracket｜Frame｜Ground

26

°C

Maximum Surface Temperature Reduction

13.5

%

Increase in Electricity Generation Efficiency

Chemical Industry

Enhancing Storage Safety and Improving Equipment Reliability

Oil and Gas Storage Tank｜Chemical Storage Tank｜Oil Pipeline｜Gas Pipeline｜Chemical Waste Tank

36

°C

Surface Temperature Reduction

9

°C

Internal Temperature Reduction

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Architecture

Architecture

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Power & Telecom

Power & Telecom

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New Energy

New Energy

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Logistics

Logistics

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Grain Storage

Grain Storage

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Photovoltaic

Photovoltaic

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Chemical Industry

Chemical Industry

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Featured Cases

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Library of Huashang College

Location: Guangzhou, China
Area: 3416m²
Result: Maximum Surface Temperature Reduction of 42.9°C; Energy Saving Rate for the Application Floor of 35.2 %

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Shipping Container of Leading Hospitality Services

Location: Abu Dhabi, United Arab Emirates
Area: 50m²
Result: Maximum Surface Temperature Reduction of 29.9°C

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Rooftop of Citibank Tower

Location: Hong Kong, China
Area: 1200m²
Result: Maximum Surface Temperature Reduction of 25.7°C; Power Generation Efficiency Increase of 8%

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Rooftop of Hang Lung Group

Location: Hong Kong, China
Area: 50m²
Result: Maximum Surface Temperature Reduction of 32°C

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Dedicated to Advancing Sustainable Development

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642,614

㎡

Application Area

11,998,278

Kwh

Energy Saving

10,790,081

Kg

Carbon Reduction

The statistics are cumulative and last updated on July 31, 2025.

News

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2025-03-11

i2Cool Forges Strategic Partnership with Marubeni to Advance the Global Application of Electricity-Free Cooling Technology

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2025-01-06

How i2Cool's Electricity-Free Cooling Paint Contributes to Sustainable Event Operations at the Hong Kong Coliseum

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2024-12-10

15th Anniversary to the School of Energy and Environment at CityUHK: i2Cool Expands from Here to the World

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2024-11-27

Prof. Martin ZHU Named the Bloomberg New Economy Catalyst

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2024-11-05

i2Cool Showcases Electricity-free Cooling Technology at Hong Kong's InnoCarnival and Eco Expo Asia

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Get to know i2Cool products and cooling solutions.

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