TUNABONE Top vent — TunaBone Top vent roof/top ventilation unit

TUNABONE Top vent — TunaBone Top vent roof/top ventilation unit is a top-mounted ventilation element designed to provide airflow at the highest point of a building or enclosure. It supports passive or mechanical ventilation strategies to remove warm air and moisture from attics, roof spaces and enclosed technical rooms. The unit is intended for installation on horizontal or slightly pitched roofs and can be integrated with existing ducting or left to function as a roof-mounted outlet for natural draft.

Advantages

The TUNABONE Top vent enables removal of heat and humidity without major roof reconstruction, offering a compact footprint and a straightforward installation profile. It is compatible with both passive and mechanically assisted systems, allowing flexible integration into ventilation designs. The unit is constructed to withstand outdoor exposure and to direct airflow outward while limiting ingress of rain and debris.

Suitable for

• Attics and loft spaces that require improved heat and moisture evacuation
• Residential roofs where a discreet top-mounted vent is needed
• Commercial and light industrial enclosures with roof-level ventilation outlets
• Ventilation systems that use passive stack effect or that are assisted by fans

When it may not be suitable

This Top vent is designed primarily as a roof or top-mounted outlet and may not be suitable where sidewall or low-level intake vents are required to achieve correct airflow balance. It is not described as a complete powered fan unit with rated airflow; for applications needing specified mechanical extraction rates, a dedicated fan with documented performance should be selected or the unit combined with an appropriately rated fan.

Key specifications

• Mounting position: roof / top-mounted ventilation outlet
• Function: supports passive or mechanically assisted airflow and heat/moisture removal
• Application environments: residential, commercial, industrial enclosures
• Installation: designed for integration with ducting or as standalone roof outlet
• Weather protection: gravity- or hood-style discharge to reduce rain and debris ingress

How to use

Select a suitable roof location at the highest practical point of the space to be ventilated and ensure the roof opening matches the unit's base dimensions. Install the Top vent according to roofing material and slope requirements, sealing the perimeter to prevent leaks and connecting to internal ductwork when mechanical assistance or directed flow is required. If used passively, confirm that intake vents at lower levels provide adequate air supply to maintain circulation. Follow local building codes and roof manufacturer guidelines during installation.

What to consider before purchase

• Compatibility with roof type and slope where the unit will be mounted
• Whether passive ventilation capacity is sufficient or if mechanical assistance is needed
• Need for integration with existing ductwork or roof flashings
• Local weather exposure and any additional weatherproofing requirements

Usage recommendations

For effective performance, position the TUNABONE Top vent at the highest point of the ventilated space, maintain clear intake openings lower in the building, and periodically inspect the unit for debris or blocked discharge. When mechanical extraction is required, match the fan performance to the enclosure volume and ensure professional installation to preserve roof watertightness.