16/10/2026
🆕 We’ve added two new telescopic passive vents to our condensation control range.
Designed for walls from 300mm to 550mm thick, both vents use an adjustable duct that fits without cutting — ideal where a standard-length duct won’t quite do the job.
Choose the compact 100mm Perma-Vent, or the higher-capacity 150mm PermaPROTECT model, which also complies with Part F of the Building Regulations.
Both work without electricity or moving parts, helping reduce localised condensation and the conditions that can lead to mould growth. The telescopic design also makes it easier to achieve the right fit on thicker walls without cutting the duct down to size.
Find out more ⬇️
Buy environmentally-friendly passive vents from Permagard. Using natural forces, our passive ventilation systems encourage airflow through your property.