Telescopic Under Floor Vent 1201 Reviews

Tough, adjustable ventilator for ground floorsUse To provide ventilation below suspended ground floors Features and benefits Telescopic and adjustable for a step of 3, 4 or 5 brick coursesHorizontal and vertical extension accessories availableEquivalent of 6000mm2 per unitSpecial grille included to prevent entry of verminDurable, robust and totally resistant to decayQualitySatisfies all NHBC requirementsManufactured to BS EN ISO 9001 and BS EN ISO 14001 Complies with all relevant Building Regulations Meets all relevant British StandardsMaterial and colour choiceManufactured by injection moulding in polypropyleneAvailable in black only in packs of 20Installation adviceAlways use in conjunction with a Timloc airbrickThe airbrick and upper front opening of the telescopic underfloor ventilator must be positioned above the finished external ground level - usually at the same level as the ground level DPCThe lower rear opening of the product must project down to thelevel of the underfloor void and must not be obstructed by thefloor construction. A vertical extension sleeve is available to fitwith this product if the standard 5 course step is not adequateBuilding Regulations require a free airflow below suspended ground floors of at least 1500mm2 per metre run of wall. This can be achieved by spacing the ventilators at 4m centres, however, such a wide spacing is not recommended as stagnant air pockets could form in the underfloor void. Timloc recommend a spacing of not more than 2m centres to comply with NHBC standards.The NHBC recommend that underfloor ventilators are spaced at a maximum of 2m centres, with ventilators also positioned not more than 450mm from the ends of the wallAs a minimum requirement ventilators should be positioneddown two opposite sides of the building so as to create a crossflow ventilation action. It is good practice to position ventilatorsaround the full perimeter of the building, particularly withcomplex building designsIf the underfloor void is separated by dividing walls, openings mustbe provided to allow a free flow of air around the underfloor voidThe standard ventilator will fit into a cavity wall with an externalleaf of 100-102.5mm, a minimum cavity width of 50mm and across cavity of 100mm. External and internal horizontal extensionsleeves are available to accommodate thicker walls or widercavitiesHow to orderMeasure the length of each wall requiring telescopic underfloor ventilators, and divide by 2m to establish the quantity required.Always round up if the calculation does not work out to an exact whole number