The OFT terminal range is suitable for use with soil & vent systems and for both mechanical and natural (passive) ventilation installations.
The OFT 5 range has a higher insulation value above the roof space which therefore reduces the risk of condensation.
Material Per Roof Type;
EPDM: Polyethylene/Aluminium/ EPDM
Polyethylene is fire retardant
Height Above Roof: 380mm
Flange DIa: 490mm
Depth Below Roof: 608mm
Free Vent Area mm2: 14400
Pa Resistance Extract: (Reading at 200m3/h) 1.3