MV251 Periscope Cavity Ventilator

by Glidevale Protect

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Description

The periscope is used with an airbrick to provide underfloor ventilation of suspended timber or suspended concrete ground floors. The periscope is adjustable between 3 and 4 brick courses and may be sealed with tape. The MV254 Vertical Adaptor, when fitted between the two halves of the periscope, will increase the overall adjustment to between 5 and 6 brick courses, and may be sealed with tape.

Provides ventilation beneath suspended floors
Vertical adjustment for 3 to 4 brick courses
Works in cavities from 50mm to 100mm
Can be used with MV250 Airbrick, MV254 Vertical Adaptor and MV253 Vent Pipe Adaptor

Object Data

1 Revision

Last Updated

15/01/2026

Available Software

BS1192:4

Compliant

BSB

Compliant

EPD

Not Available

Accompanying literature

Object User Guide

Product Data Sheet

Object metadata

_AuthorWB
_Authorized Bybimstore
_Bim Spec Guid0
_BS Bible Version17
_Created Bywww.bimstore.co/
_Current Revision0
_Distributed Bywww.bimstore.co/
_Object User Guideglidevaleprotect.com/technical-resources/downloads/
Accessibility Performancen/a
Assembly Coden/a
Asset TypeFixed
BIM Object NameGlidevaleProtect_CavityVentilators_Periscope_MV251
Classification NameUniclass2015
Classification ValuePr_30_59_96_92
Code Performancen/a
ColorBlack
Created Byinfo@glidevaleprotect.com
Created On2026-01-01 T09:00:00
Default Elevation0.00 mm
DescriptionThe periscope is used with the airbrick to provide underfloor ventilation of suspended timber or suspended concrete ground floors. The periscope is adjustable between 3 and 4 brick courses and may be sealed with tape. The MV254 Vertical Adaptor, when fitted between the two halves of the periscope, will increase the overall adjustment to between 5 and 6 brick courses, and may be sealed with tape.
Documentation Certificatesglidevaleprotect.com/product/underfloor-cavity-wall-vents/
Documentation Installation Guideglidevaleprotect.com/product/underfloor-cavity-wall-vents/
Documentation Literatureglidevaleprotect.com/product/underfloor-cavity-wall-vents/
Documentation Maintenanceglidevaleprotect.com/product/underfloor-cavity-wall-vents/
Documentation Technicalglidevaleprotect.com/product/underfloor-cavity-wall-vents/
Duration UnitYear
Expected Life0
Features- Provides ventilation beneath suspended floors - Vertical adjustment for 3 to 4 brick courses - Works in cavities from 50mm to 100mm - Can be used with MV250 Airbrick, MV254 Vertical Adaptor and MV253 Vent Pipe Adaptor
Finishn/a
Graden/a
Ifc Export AsIfcBuildingElementProxyCommon
Ifc Export TypeUSERDEFINED
Keynoten/a
ManufacturerGlidevale Protect
Manufacturer NameGlidevale Protect
MaterialPolypropylene
ModelMV251
Model NumberMV251
Model ReferenceMV251 Periscope
NBS DescriptionVentilation ducts
NBS Object NameGlidevale Protect - Ventilation ducts
NBS Office Master Tagn/a
NBS Reference45-80-50/394
Nominal Depth0.00 mm
Nominal Height0.00 mm
Nominal Length0.00 mm
Production Year2026
Referenced Standardn/a
Replacement Costn/a
Shapen/a
Sizen/a
Spare Partsn/a
Type CommentsMV251 Periscope
Type NameMV251 Periscope
URLglidevaleprotect.com/
Warranty Descriptionn/a
Warranty Duration Labor0
Warranty Duration Parts0
Warranty Duration UnitYear
Warranty Guarantor Laborn/a
Warranty Guarantor Partsinfo@glidevaleprotect.com