Who are we? 

We are urban environmental consultants. 

Mission: Through a technical data-driven approach, we strive to improve people’s quality of life by 
designing greener, cooler, healthier cities.

Vision: We are convinced that the future of our planet will depend on the ability of our cities to adapt, 

and we must use everyone’s potential to build those resilient cities.

Where are we?

ECOTEN urban comfort s.r.o. is incorporated in Prague, Czech Republic.
We also operate in the United States through FONTIS Technologies LLC, Las Vegas, our exclusive licensor in North America.

Our story

Our founders

Ing. Jiří Tencar (PhD)
CEO & Founder

Ing. Jiří Tencar (PhD)


Jiri Tencar Ing., Dr., graduated in Structural Engineering and Architecture from Czech Technical University in Prague, in 2002. In 2009, he received the Ph.D. degree in Sustainable Development and Industrial Heritage from the Czech Technical University. He was a visiting Research Scholar at the University of Cambridge, Department of Architecture. Jiri is the guarantor for buildings and energetics in the Smart City Pisek Coordinator Office. External teacher at the Faculty of Civil Engineering at the Czech Technical University in Prague (CTU) and a researcher at University Centre of Energy Efficient Buildings at CTU. Founder and CEO of ECOTEN (Smart Energy Solutions) s.r.o., energy consultancy and design company focusing on Sustainable Architecture and ECOTEN urban comfort s.r.o., an urban environmental consultancy focused on the climate adaptation of cities. Passionate about sustainable, smart and green building, architecture, energy efficiency and optimization, resilience strategies and adaptation towards climate change by means of smart cities. He is the author or co-author of several scientific papers and two books..


Sagnik Bhattacharjee

Sagnik Bhattacharjee, MSc., graduated with a Masters in City and Urban environment with a specialization in Atmosphere, Water and Urban Environment from Ecole Centrale Nantes, France in 2018. He is passionate about urban resilience to climate change impacts, environmental impact in urban ecosystem, and the use of nature-based solutions to mitigate the impact of climate change in cities. In 2018, he co-founded ECOTEN Urban Comfort s.r.o., an urban environmental consultancy focused on the climate adaptation of cities and is currently working there as the CTO. He conceptualized the measurement of urban heat vulnerability index (UHVI) which was mentioned in the European Handbook for SDG Voluntary Local Reviews 2020 published by the Joint Research Centre of the European Commission as an exemplary indicator for European cities willing to take action on SDG goals through voluntary local review.  He manages the urban heat vulnerability assessment services with GIS and remote sensing technology for measuring the UHVI for city planners and urban developers and the urban microclimate simulation assessment services with the urban environmental software suite SOLENE-microclimat for urban development stakeholders. He is also managing the commercial development of the SOLENE-microclimat and the development of API services for urban heat vulnerability assessment with funding from ESA BIC Czech Republic. He is responsible for the integration of new methods, frameworks and technologies to optimize the assessment of climate change vulnerability and develop NBS based urban design for urban resiliency for cities. As of 2023, he is the author or co-author of 3 scientific papers and is also leading the participation of ECOTEN urban comfort s.r.o. for Horizon Europe project “Re-Valuing Urban Quality & Climate Neutrality in European Waterfront Cities” co-funded by the European Union.


Sagnik Bhattacharjee
CTO & cofounder

Our team 

Dominika Krauskova
Remote sensing specialist

Dominika Krauskova


Doctoral candidate in Forest Management and Applied Geoinformatics programme at Mendel University in Brno, Czechia. Interested in earth observation, enthusiastic about acquiring knowledge in the field of remote sensing technologies to monitor vegetation and to achieve environment sustainibility.

Priscille Marques
Business development intern

Priscille Marques

MSc in International Affairs and Development specialised in Sustainable development at Paris-Dauphine University, France. Priscille is in charge of outreach actions to allow cities to access our expertise.

Yuk Ming Chui
Microclimate simulation specialist


Yuk Ming Chui


Masters in Technology and Environmental Engineering at Czech University of Life Sciences Prague. Passionate about improving quality of life by solving environmental issues such as pollution and climate change. Yuk is working in the simulation team of urban microclimate.


Tiphaine Gaillot
Business development intern

Tiphaine Gaillot

Bachelor in management, in the french business school ESSCA. Interested in sustainable entrepreneurship, Tiphaine is in charge of developing ECOTEN expertise abroad.

David Šklíba

David Šklíba


Masters student in Geoinfomatics, cartography and remote sensing at Faculty of Science (Charles University). Relentless Python programmer craving for doses of dopamine while solving individual problems. Passion in seeking spatial dependencies.

Our partners