Ridge Ventilators

Continuous roof ventilation for improved airflow and cooling.

Heat rises. In any industrial building, warehouse, or large-span shed, the hottest, most stale air accumulates at the highest point of the roof — and if there is no way for it to escape, it simply stays there, raising internal temperatures, increasing humidity, and degrading the working environment for everyone below. Ridge Ventilators from Astal Roofing Industries are fixed ventilation units installed continuously along the roof ridge — the single most effective position to exhaust accumulated hot air, fumes, and moisture from large industrial buildings with zero energy consumption and zero moving parts to maintain.

What Are Ridge Ventilators?

Ridge Ventilators are fixed, passive ventilation units mounted along the apex of a pitched industrial roof — spanning the full ridge length or installed at specified intervals to provide continuous natural ventilation. Unlike turbo ventilators that rely on wind-driven rotation, ridge ventilators work on the stack effect principle — hot air naturally rises and escapes through the open throat of the ventilator unit, drawing in cooler replacement air from inlets at the eaves. This creates a continuous, self-sustaining airflow through the building that operates regardless of wind direction or speed, 24 hours a day, with no power supply and no mechanical components.

Available in 600mm and 900mm throat widths, our ridge ventilators are engineered to deliver the ventilation capacity required for a wide range of industrial building widths, heat loads, and occupancy types — from light commercial warehouses to heavy industrial manufacturing facilities with significant process heat and fume outputs.

Throat Size Options — 600mm & 900mm

600mm Throat

Suited for medium-span industrial buildings, warehouses, and commercial structures with moderate heat and airflow requirements. Provides effective ridge ventilation while maintaining a lower profile on the roofline.

900mm Throat

Specified for wide-span industrial facilities, heavy manufacturing plants, and high-heat-load applications where maximum air exhaust volume is required across the full ridge length for effective temperature and air quality control.

Key Features & Technical Specifications

Continuous Ridge Installation for Maximum Airflow

Installed along the full roof ridge — the highest and hottest point of any pitched roof — ridge ventilators provide a continuous exhaust opening that captures and expels accumulated hot air, steam, fumes, and moisture across the entire building width, delivering far greater ventilation effectiveness per unit of installation cost than point-source exhaust units positioned lower on the roof.

Available in 600mm & 900mm Throat Widths

Two throat size options allow precise ventilation capacity matching to building span, internal heat load, and occupancy requirements — ensuring the correct exhaust volume is achieved without over-specifying and increasing unnecessary capital cost, or under-specifying and failing to meet ventilation performance targets.

Durable & Weather Resistant Construction

Manufactured from high-quality steel with a protective coating finish — engineered to withstand India’s extreme seasonal conditions, including monsoon-intensity rainfall, high UV exposure, coastal salt air, and the thermal cycling that roofline components experience between peak summer and winter temperatures year after year.

Seamlessly Integrated with Roof Design

Profiled to blend with standard industrial roofing sheet profiles — ridge ventilators are installed as a natural extension of the ridge line, maintaining the clean visual profile of the roof without the disruption of protruding point-source ventilators or unsightly mechanical exhaust units on the roof surface.

Zero Energy, Zero Maintenance Operation

No electricity, no motors, no rotating parts, and no scheduled maintenance — once installed, ridge ventilators operate indefinitely on the stack effect principle, providing continuous passive ventilation with no running cost and no operational intervention required across the full building service life.

Custom Lengths & Configurations Available

Supplied in standard modular sections that can be configured to any required ridge length — and available in custom profiles and throat dimensions for non-standard building geometries, ensuring the ventilation system is matched precisely to the structural and architectural requirements of every project.

Ridge Ventilator vs Turbo Ventilator — Which Is Right for Your Building?

Both ridge ventilators and turbo ventilators provide natural, zero-energy ventilation — but they suit different building types and ventilation strategies:

Ridge Ventilators

Ridge Ventilators provide continuous, distributed ventilation along the full ridge length — best suited for large-span buildings where uniform airflow across the entire floor area is needed, and for facilities where a flush, integrated roof profile is architecturally important.

Turbo Ventilators

Turbo Ventilators provide concentrated point-source exhaust at specific roof locations — best suited for targeted heat or fume extraction from specific areas of a building, or for smaller buildings where one or two high-capacity units can handle the full ventilation requirement.

Many industrial facilities use both systems together — ridge ventilators for general background ventilation and turbo ventilators for targeted exhaust over high-heat process areas. Our team can advise on the optimal combination for your specific building and application.

Applications

Industrial Buildings & Manufacturing Plants

Continuously exhausts process heat, fumes, and airborne contaminants from factory floors — improving worker safety, air quality compliance, and thermal comfort without mechanical ventilation energy costs.

Warehouses & Logistics Centres

Prevents heat and humidity build-up in large-span storage buildings — protecting stock integrity, maintaining comfortable working conditions, and reducing cooling energy loads across extensive roof areas.

Pre-engineered buildings (PEB) and portal frame industrial structures
Agricultural storage facilities and rural processing sheds
Commercial kitchens, canteens, and food processing buildings
Automotive workshops, paint facilities, and maintenance hangars

Why Source Ridge Ventilators from Astal Roofing?

At Astal Roofing Industries, Ridge Ventilators are designed and manufactured to integrate directly with our full range of roofing sheet profiles — so the base flashing, ridge cap interface, and sheet-to-ventilator junction are all resolved at the manufacturing stage, not left to be detailed on site. Every ridge ventilator is supplied with a compatible base flashing that seals against the roofing sheet profile, ensuring a weatherproof installation that maintains the full waterproofing integrity of the roof at the ventilator junction.

We supply ridge ventilators to EPC contractors, structural engineers, and project procurement teams across India — with ventilation rate data, installation guides, and specification support available to assist with unit sizing, layout planning, and throat size selection for every project type and building size.