Saved
7,680MWh / year
of electricity. The façade delivers cleaner, colder air to the cooling system, so the chillers work far less.
Turning Buildings into Positive Assets
Enabling Buildings to Save energy, Clean air while adding extra insulation
Inside 35°C21.4°C
- Hot aisle:
- 35 °C, no change
- Cooling air:
- 23 °C from the chillers → 21.4 °C with Wall-GapS™
- Façade surface:
- 42.2 → 22.9 °C, measured on our pilot
Façade42.2°C22.9°C
Chillers100%25%
Wall-GapS™ façade
- Today A hot data hall The chillers run all year to keep it cool.
- Wall-GapS™ An active façade 1,000 m² of Wall-GapS™ cleans and cools the outside air.
- Result 7,680 MWh saved a year 47% less electricity for cooling. It pays for itself in about 7 months.
- Clean air Cleaner air in every breath up to−50%PM2.5 up to−90%PM10
- Smart Energy Optimizer AI-Driven Monitoring & Control A SaaS & HaaS platform that autonomously increases the system's energy performance.
Brussels, Belgium · 5 MW legacy data centre · PUE 1.56 → 1.38
PurCity on Stage
about 4 and a half minutesWinner of IC Taiwan Grand Challenge – Taipei-Taiwan (2025). Our latest full pitch on a large international stage.
Unlike traditional passive façade solutions that focus solely on insulation, PurCity's modular system transforms building facades into active, multifunctional components that not only provide insulation and reduce HVAC energy consumption by up to 60% but also significantly improve indoor air quality.
Annual Wall-GapS™ Performance
Brussels, BelgiumCalculated for a 5 MW legacy data centre with 1,000 m² of Wall-GapS™, using real data from our Toyota pilot and local weather, energy prices and grid data.
Energy saving
Less cooling
47%
less electricity for cooling: from 16,434 down to 8,750 MWh a year.
Existing Wall vs. Wall-GapS™ integrated
No Wall-GapS™1,000 m² (Brussels case)
1,000 m² of Wall-GapS™
Electricity consumption for cooling
8,750 MWh / year
- Saved
- 7,680 MWh
- Net saving
- €1.12M / yr
- Payback
- 7 months
Financials
Net saving
€1.12M/ year
every year, after water and maintenance.
Payback
7months
to pay back the €645 k investment.
Clean air
PM2.5 removed
up to50%
of fine particles taken out of the outside air before it reaches the building.
PM10 removed
up to90%
of coarse particles taken out of the same air.
Sustainability
CO₂ avoided
1,150t / year
less CO₂ every year (based on Belgium's average electricity mix, 2025).
Mature trees' CO₂ reduction/year
52,400trees
Each mature tree takes up about 22 kg of CO₂ a year.
Partners
Free Calculate the savings on your building
Data center, factory, logistics hall or office. Under two minutes.
Sustainability Starts HereNo cost, no obligation.
Products
Wall-GapS™
Wall-GapS™ is a patented, multi-functional exterior facade that replaces traditional building panels. It cleans polluted air using natural ventilation and provides extra insulation, helping buildings save energy and improve air quality with benefits such as:
Air2Pure IoT
The Air2Pure IoT system, is specifically designed to help industrial applications optimize their carbon footprint and sustainability. By incorporating AI and machine learning as a service, the system provides real-time tracking, predictive control, and automation to ensure peak performance. (Sponsored by MGE Ventures Holding ApS)
18international awards
Awards & Recognition
Winner
IC Taiwan Grand Challenge – Taipei-Taiwan (2025)
Winner
TOYOTA Startup Accelerator Competition, stage 1 and 2
Brussels-Belgium
1st place Winner
Global Problem Solver Challenge in EMEA, by CISCO-USA
Winner
eit Awards "Innovators" Award Winner of the year Brussels-Belgium
Platinum Prize
I4BS (Innovations for Blue Skies), under National Council on Climate and Air Quality (NCCA)
Seoul-S.Korea
Top 5 Winner
The Shanghai Makers’ global competition, awarded as Excellent Project of the year Shanghai-China
Winner
BoostUp EIT Manufacturing, Greece
Winner
International UrbanTech Competition, Denmark
Winner
Clean Cities ClimAccelerator stage 1, 2, and 3, Spain & Austria
Seal of Excellence
Scored as a high-quality project proposal by EIC-SME instrument in a highly competitive evaluation process
Winner
From Expo Live Global Innovation competition on Climate category UAE-Dubai
2018's YTILI fellow
Young Transatlantic Innovation Leaders Initiative - By German Marshall Fund of United States Pennsylvania-USA
Year's Design Hero
Awarded as Second World's Top Design Award for construction materials
Special Award
International Competition in GreenTech and Winner of Bridge to MassChallenge, Taipei-Taiwan
2nd World's top
Design A'Design Award
1st place Award
MassCEC in Global Smart City Competition, Boston-US
Top 10 World’s best
Pitch contestant, EPiC, Hong Kong
Excellence
Received the Certificate of Excellence for the Special design Rome-Itally
Pilot Project with TOYOTA
As part of the Toyota Acceleration program, PurCity successfully completed the "Wall-GapS™" pilot project with Toyota Motor Europe in Brussels. This achievement was the result of seamless teamwork and collaboration with our German partners at ABICOR BINZEL.
The process, from pre-fabrication and implementation to final on-site testing with Toyota's local contractors, showcased our ability to deliver innovative, sustainable solutions under demanding conditions. The successful outcome validates our technology and paves the way for future projects.
Toyota Motor Europe hosted the pilot; no endorsement is implied.
Act Locally, Sustain Globally
PurCity's mission is to drive sustainable transformation in cities, one building at a time. Each successful project is a local victory for sustainability, and together they build a global network of smart, green infrastructure.
37%
of global emissions come from buildings and construction
70%
of global CO₂ comes from cities, which cover just 2% of the land
2.5billion
more people will live in cities by 2050
7.9million
deaths in 2023 were linked to air pollution
Testimonial
Latest News
Subscribe to stay updated. We are committed to shine in sustainable solutions and innovation across communities globally.
Subscribe
Awarded IC Taiwan Grand Challenge Prize
PurCity Triumphs in Taipei: Awarded IC Taiwan Grand Challenge Prize from Minister of National Science and Tech...
Top 5 spot in the global stage
PurCity Secures Top 5 Spot at Global Shanghai Makers CompetitionPurCity is honored to announce its remarkable...
Winner of Expo Live Innovation Program
Winner of Expo Live Innovation ProgramPurCity is proud to announce its selection as a winner of the Expo Live...
Winner of Grand Final EIT Manufacturing
PurCity Triumphs at EIT Manufacturing “BoostUp” and Advances to Prestigious EIT AwardsPurCity has achieved a s...
1st place Winner of CISCO Global Problem Solver Challenge "EMEA"
PurCity's Victory at the CISCO Global Problem Solver Challenge PurCity was recently announced as the first-pla...
- Top award-winning company
- Patent pending
- Tested & validated technology
AI Assistant