The T-Vent is installed 1-2 units between each rafter at the eaves or ridge. Double installation is required to completely replace the traditional open eaves or fully ventilated ridge. The placement is above the wooden substrate and the underlay between the battens above the rafter and the battens in the middle between the rafters. The installation is done in a drilled hole with a diameter of 83 mm (±2 mm) and with the help and support of the guide rail at the bottom. The attachment is done with five mounting screws for external use in the collar/screen of the vent.