Midi Maxi Duo High Rise Wall Mount Vent Kit - 500mm Long Vento

Overview

Designed for internal installation, this external wall kit provides a practical solution for fitting single room heat recovery ventilation units in flats, apartments, and multi-storey buildings where external access is restricted. By allowing installation from inside the property, it removes the need for scaffolding, ladders, or specialist access equipment, helping to reduce installation costs, minimise safety risks, and simplify retrofit projects.

It is suitable for housing upgrades, property refurbishments, and projects requiring compliance with current Building Regulations and energy efficiency standards. The kit is particularly well suited to installers, landlords, local authorities, housing associations, and homeowners seeking a reliable ventilation installation solution with minimal disruption.

Key Features

The kit enables secure installation from within the building using a pre-fitted external hood and integrated silicone sealing ring to create a weatherproof finish. It is designed for use with compatible single room heat recovery ventilation units and supports installation where external access is difficult, including walls above conservatories, extensions, or close to neighbouring properties.

The external grille is manufactured from UV-stable, flame-retardant PVC and is weatherproof for long-term durability. It is supplied in white as standard, with optional black, grey, brown, terracotta, or bespoke painted metal finishes to complement different building exteriors.

• Compatible with MAXI, MIDI, and DUO single room heat recovery units.
• Not suitable for the MINI model.
• External grille, integrated silicone seal, rigid PVC wall duct, foam wedges, installation instructions included.

Benefits

Installing the ventilation system from inside the property reduces the need for external access equipment, making projects safer and more cost-effective. This approach is particularly beneficial for high-rise buildings, retrofit installations, and occupied properties where minimising disruption is important.

The secure weatherproof seal and recommended installation method support reliable long-term performance, while the compatibility with existing ventilation units provides a straightforward solution for residential property improvements and housing upgrades.

Applications

This solution is intended for residential properties including multi-storey flats and apartment blocks, as well as retrofit projects where external access is limited. It is suitable for urban environments and buildings where traditional external installation methods are impractical.

It is appropriate for property professionals managing inaccessible installations, local authorities and landlords upgrading housing stock, and refurbishment projects requiring efficient installation with minimal tenant disruption.

Technical Notes

Installation requires drilling a 180 mm core hole through the external wall before inserting the pre-fitted external hood and silicone sealing ring from inside the property. The rigid 160 mm duct should be installed with a slight downward angle to assist drainage before being secured with the supplied foam wedges and standard mounting foam or sealant.

• Duct length, 500 mm, maximum wall thickness, approximately 450 mm.
• Core drill size, Ø180 mm.
• External grille diameter, Ø206 mm.
• Material, UV-stable, flame-retardant PVC.
• Recommended installation angle, 2–3° downward slope.