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.
Please note that these product properties are not a replacement for the manufacturer's literature and it is always recommended that Ubbink (UK) is consulted before specifying.
Ubbink (UK) hasn't formatted technical specifications for OFT5 Flat Roof Insulated Terminal yet. However, you can download 2 technical files, in the section below.
Please check out the similar products section for alternatives. Hint: products with have technical specifications.