ParaSITE shelters are custom built inflatable structures designed for homeless people that attach to the exterior outtake vents of a building’s Heating, Ventilation, and Air Conditioning (HVAC) system. The warm air leaving the building simultaneously inflates and heats the double membrane structure. The project began with the distribution of these shelters to over 30 unhoused people in Boston and Cambridge, MA and New York City, and since then, they are constructed and distributed every year in Chicago.