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Hot Heart wins the Helsinki Energy Challenge

Hot Heart from CRA-Carlo Ratti Associati is a winner of the Helsinki Energy Challenge, which aims to decarbonise the heating of the Finnish capital by 2030.  We worked alongside CRA to create a vision film that explains the Hot Heart concept. Our jargon-free approach helped engage an international jury with the opportunity, placing our team as one of four winners. 


The film narrative has simplicity at the core, it acts as an instruction manual to the Hot Heart concept. We chose this approach because the project is bold and adventurous, and by keeping the film concise and simple, we’re making the concept less daunting. The instruction manual approach also acts as a metaphor for how this concept can be taken and applied to other cities around the world.

The Hot Heart_stills_credit by Squint_Opera4

Hot Heart will be the largest infrastructural facility of its kind. The system functions like a giant thermal battery: low- or negative-cost renewable energy is converted into heat, stored in the tanks and withdrawn into the city’s heat distribution channels during the winter. Hot Heart also doubles as a unique recreational venue, with four of the 10 hot water reservoirs containing 'Floating Forests' and pools. These create a unique public space for residents and provide an attraction for international travellers. 

The Hot Heart_stills_credit by Squint_Opera10
The Hot Heart_stills_credit by Squint_Opera12

The Helsinki Energy Challenge received 252 entrants from more than 35 countries in the first stage of the year-long challenge. The jury then selected four winning projects from ten finalist teams. Hot Heart was developed by CRA-Carlo Ratti Associati in collaboration with Ramboll, Transsolar, Danfoss Leanheat®, Schneider Electric, OP Financial Group, schlaich bergermann partner and Squint/Opera. 

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