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VL-77EX Exhaust Louvre
Description

The Ventüer VL-77EX aluminium louvre system is designed specifically for exhaust situations and provides a low pressure drop allowing maximum airflow with minimum mechanical assistance. It has a low rain defence effectiveness, however this is not typically an issue in exhaust scenarios.

The rear of the louvre can be fitted with bird mesh, insect mesh or dust filters. Available in a wide range of standard powdercoat colours, the VL-77EX is manufactured to order and can be fabricated in a wide range of sizes. Independently tested and certified to BS/EN:13030.

Key Features
  • Very low pressure loss, resulting in high airflow and minimal load on mechanical equipment
  • Compatible with all common structure and cladding types, including precast concrete, metal cladding, fibre cement sheet and unitised curtainwall systems
  • Extruded aluminium construction, available in any standard powdercoat colour or anodising
  • Can be fitted with ancillaries such as bird mesh, insect mesh, dust filters, mechanical dampers and plenums
  • Independently tested and certified to BS/EN:13030
Scope of Use
  • Designed for use as an exhaust louvre in situations where exposure to moderate levels of wind and rain are expected, and where some water carry over is acceptable
  • Aerodynamic blade profile which result very low pressure loss and minimal load on mechanical plant
  • Constructed from extruded aluminium and suitable for salt-spray zones and other corrosive environments when powdercoated appropriately
  • Compatible with all common structure and cladding types, including precast concrete, metal cladding, fibre cement sheet and unitised curtainwall systems
  • Ancillaries such as bird mesh, insect mesh, dust filters, mechanical dampers and plenums can be supplied fitted to the rear face
Limitations on Use

The VL-77EX should not be used as an intake louvre or passive ventilator due to its low resistance to wind driven rain.

Installation Requirements

Installation requirements for the VL-77EX louvre system vary dependent on the site wind loads, louvre panel sizes, cladding type and primary structure detailing. Ventüer provides full shop drawings for all installations which show sequencing, fixing type and sizing, flashing requirements and sealant details. Installers should make themselves fully conversant with these shop drawings prior to installation commencing.

Statement of Building Code Compliance
  • When sized correctly, the VL-77EX louvre system complies with the requirements for natural ventilation of buildings under the New Zealand Building Code clause G4
  • When installed in accordance with Ventüer technical literature, shop drawings and site-specific engineering the VL-77EX louvre system complies with the requirements for structure under the New Zealand Building Code clause B1
  • When installed in accordance with Ventüer technical literature and shop drawings the VL-77EX louvre system complies with the requirements around external moisture as outline in New Zealand Building Code clause E2
In-Service History

The VL-77EX louvre system was developed in New Zealand in 2011. Since that time it has been used extensively on a wide range of projects including industrial buildings, hospitals and storage facilities throughout New Zealand. Refer to the Ventüer website for detailed case studies.

Other Performance Attributes

Performance tested for weather resistance and airflow performance to BS/EN:13030, the VL-77EX is classified as follows:

  • Aerodynamic Coefficients:
    • Air Inlet: 0.376, Class 2
    • Air Extract: 0.376, Class 2
  • Rainwater Penetration:
    • Class C — up to 0.5m/s suction velocity
    • Class D — up to 3.5m/s suction velocity

Engineered to withstand site-specific structural, seismic and wind loads in accordance with NZS:1170.

Fixings, flashings and sealant details are designed to comply with NZ Building Code Clause E2.

Warranty and Maintenance

Warranty information and maintenance requirements to comply with B2 can be found in the Ventüer Aluminium Ventilation Louvre Operation & Maintenance Manual.

Environmental Information

All Ventüer ventilation louvre systems are fabricated from aluminium which is extruded locally here in New Zealand. The majority of this aluminium is "green aluminium", meaning that the electricity for smelting is supplied from renewable energy sources (such as is the case with Tiwai Point, which relies on hydro-power).

Any waste generated during manufacture is fully recycled, as can be any louvres at the end of their useful life.

All powdercoating of louvre components is carried out by certified applicators and the use of chromate treatment processes is strictly avoided.

Effective use of passive ventilation devices such as louvre systems can significantly reduce the energy consumption of a building, reducing both its carbon footprint and whole of life cost.

Documents
Ventuer Ventilation Louvres Manual

2022

Data Sheet: VL-77EX
Ventuer Louvre Calculator
Ventuer Aluminium Ventilation Louvre Operation & Maintenance Manual
Ventilation Louvre Structural Fixing Guide

VL-PFSG v1

Ventuer Powdercoat Colours

2018

Ventilation Case Studies
CAD/PDF Details
VL-77EX Data Sheet

VL-77EX

Installation Details
VL-77EX Fixing to Brick Veneer

VL-77EX

VL-77EX Fixing to Fibre Cement Cladding

VL-77EX

VL-77EX Fixing to Horizontal Profiled Metal Cladding

VL-77EX

VL-77EX Fixing to Precast Concrete

VL-77EX

VL-77EX Fixing to Vertical Profiled Metal Cladding

VL-77EX

VL-77EX Fixing to Window Joinery

VL-77EX

VL-77EX Window Joinery — Glazed In

VL-77EX

Ventüer designs and supplies engineered natural and mechanical ventilation products and systems for commercial, industrial and high-density residential construction projects.

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