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Systemair RAW Horizontal Discharge Roof Cowl 300 / 315 – GRP Weatherproof Roof Terminal
The Systemair RAW Horizontal Discharge Roof Cowl 300 / 315 is a heavy-duty roof ventilation terminal manufactured from UV-stabilised glass reinforced polyester (GRP), delivering excellent corrosion resistance, low weight, and outstanding durability in exposed outdoor environments.
Designed for commercial and industrial applications, this horizontal discharge roof cowl can be installed as a passive terminal or paired with a Systemair AW plate axial fan to create a powered extract or supply ventilation system. It is suitable for installation on flat roofs or pitched roofs up to 30°, making it a versatile solution for a wide range of building types.
✅ Key Features & Benefits
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UV-Stabilised GRP Construction – Corrosion-free, lightweight and built for external use
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Horizontal Air Discharge – Directs airflow efficiently away from the roof
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Flat & Pitched Roof Compatible – Suitable for roof pitches up to 30°
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Bird Guard Included – Prevents debris and wildlife ingress as standard
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Terminal or Powered Option – Use alone or combine with an axial fan
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Architectural Colour Options – BS or RAL colours available on request
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Trusted Manufacturer – Systemair quality with 1-year warranty
🏭 Suitable Applications
Ideal for:
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Factory and warehouse ventilation
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Commercial kitchens
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Schools and colleges
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Leisure centres and sports halls
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Plant rooms
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General extract or supply systems
⚙️ Installation Options
The RAW 300 / 315 roof cowl may be installed:
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As a stand-alone roof terminal, or
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In conjunction with a Systemair AW plate axial fan to form a powered ventilation unit.
It can be mounted on:
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Flat roofs
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Pitched roofs up to 30°
🔧 Optional Accessories
Compatible accessories include:
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Back Draught Shutter – Provides an airtight seal when the fan is not running
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Purlin Box – Creates a secure roof upstand for mounting
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Soaker Sheet – Matches existing roof profiles for a weathertight finish
🎨 Finish & Colour Options
Supplied as standard in BS 00 A 05 Goosewing Grey.
Alternative finishes in any BS or RAL colour are available at additional cost—ideal for project-specific or architectural requirements.
📊 Technical Specifications
| Specification | Detail |
|---|---|
| Brand | Systemair |
| Mounting | Roof Mounted |
| Construction | UV-Stabilised GRP |
| Colour | Goosewing Grey (Standard) |
| Warranty | 1 Year Manufacturer |
| Bird Guard | Included |
| Weight | 6.5 kg |
| Dimensions (H × W × D) | 340 mm × (520 / 555 mm) × (520 / 555 mm) |
| Base Size | 520 / 555 mm Square |
| Applications | Factories, Schools, Kitchens, Leisure |
📄 Manuals & Guides
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Systemair RAW Roof Cowl 300 / 315 Installation Manual
🚀 Why Choose the Systemair RAW 300 / 315 Roof Cowl?
If you’re searching for a commercial roof ventilation cowl, GRP roof terminal for axial fans, or a weatherproof horizontal discharge roof vent, the RAW 300 / 315 delivers proven performance, installation flexibility, and long-term reliability from one of Europe’s leading ventilation manufacturers.
