Model 135-FR Capacity in m3/hour at static pressure of: Model 135-FR Flange model with the flange on the back side and executed with a straight, bottom-hinged inner flap. Control by means of an aluminium bracket mounted on the inner flap. The incorporated stainless steel spring opens the inlet; so the inlet is pulled to close. This inlet is used in those cases where the unit cannot be built or slided into the wall and therefore is to be mounted on the wall. TPI-Polytechniek BV De Waterman 4 5215 MX 's-Hertogenbosch Holland E-mail: [email protected] Internet: www.tpi-polytechniek.com