0 items in the shopping cart
  • No products in the cart.


PER3 Periscope Vent Duct and Windsor air brick


Periscope Vent Duct supplied with a telescopic sleeve and 1 Cast Iron Air Brick with choice of finishes, bare as standard or painted black ( + £5)

Use of periscope ducting is particularly useful where outside ground levels have been built up over the years. It is, and has been, over the last 100 years or so for lessor tradespersons to build on top of property pavements and patios in the back of a house and this has led to a substantial increase in their use when ventilating underfloor voids or trying to get air into a room for ventilation or fire combustion. Georgian properties are especially vulnerable to this phenomenon where they adjoin public pavements and highways because, at the front of the property,  the roads and pavements are now at least a foot higher compared to where they where when the property was first built.

The persicope can be used with CAVHEXT3 horizontal extension for deep walls or PERVEXT vertical extension for use in more than 5 courses of bricks or combined with CAVRND round adapter. The CAVRND adapter is especially useful combined with round flexible ducting to transfer ventilation air in hard to reach areas under floor boards over distance.

For commercial orders we can supply air bricks in any RAL colour, professionally primed with 3 part epoxy 2 part gloss or matt top coat at an additional cost of £200+vat – please email item number, quantity and RAL number for a proforma cost for this.

Product specifications can be found in the table below.