Spanish design firm Elii has created the JF-Kit House, based on “an image of a possible future where citizens produce part of their domestic energy requirements with their own physical activities.”

Each room in the concept house houses an exercise station that creates energy to power the home. The structure can be attached onto existing walls and roof tops as a means to generate power. Recently it was installed on the roof terrace of the Architecture Centre CIVA in Brussels.

According to Fast Company, “more than anything, it’s a showpiece meant to engage people thinking about issues about sustainability, design, and health in a new, more integrated way.”