G961 Vertical Extension Sleeve

The G961 Vertical Extension Sleeve is designed for use with the G960 Telescopic Under Floor Void Ventilator.

Features and benefits:

• Each extension sleeve enables a further two course brick adjustment vertically.
• Alternatively, the sleeve can also be clipped to the base of the G960 to provide horizontal extension through larger cavities or wider internal blockwork: each unit extends the underfloor ventilator a further 150 mm vertically or 185 mm horizontally and additional units can be added to achieve ventilation over any number of courses.
• The G961 should be used in conjunction with other Manthorpe products to provide a complete through wall ventilation system.