| 摘要 |
PROBLEM TO BE SOLVED: To provide an under-floor ventilating fan having high maintainability and construction saving and cost saving, by making use of an outside ventilating port provided in a foundation wall of a dwelling house. SOLUTION: A suction duct 7 is provided by making on outdoor air vent port 5 among a plurality of outdoor vent ports 5 provided in a foundation wall 2 forming an under-floor space 1 protrude into the under-floor space 1, and an air fan apparatus 8 communicating to the suction duct 7 is installed outside 4 a dwelling house. Furthermore, air in the under-floor space 1, divided into a plurality of subspaces by the one air fan apparatus 8, is vented via the suction duct 7, whereby there is obtained an under-floor ventilating fan of easy maintenance with easy construction and the low cost. |
