| 摘要 |
A building ventilation device (100) has an air conduit (101) arranged to receive heat form a space heater such as a radiator (R) within a building. An inlet (102) and a fan (120) at the outlet (103, 104) draw external fresh air into the conduit (101); and deliver heated fresh air to a space within the building. This is achieved without need to provide a heat source, the available heat from the radiator being utilised. The device (100) may route warm air back under the conduit (101) so that the warm air blows through the radiator, increasing efficiency of the radiator and diffusing the flow of warmed air. <Figure 9> |
