Fits between the upper and lower parts of the telescopic underfloor ventilator to accommodate a vertical step of more than 5 courses.
- Fits between upper and lower parts of the underfloor ventilator
- Accommodates a vertical step of more than 5 courses
- Purpose made eliminates the need for on site modifications
- Lightweight and easy to handle
- Does not restrict airflow through the main telescopic underfloor vent