"Hot vent: On sunny, but cold days, the blinds are rolled up and sun light enters the space. Here it heats the air which begins to move upwards. Ducts that connect the inside of the building with the conservatory are opened by the BMS and the warm air travels through to the inner rooms, being moved by the convection motion. Cold air from inside the house is brought back to the sunspace at ground floor level, thus creating a circulation of ever warmer air." Courtesy: Viking House.