Round Spiral Duct Access Panel / Doors – 300 / 315mm

Round Spiral Duct Access Panel / Doors Available Sizes: 100mm – 630mm diameter Compatible with: Spiral and seamless circular ducting Our round access doors are designed to provide safe and simple access to internal components of your ductwork system. They are used for access for cleaning, servicing and inspections, including use within fire and smoke control systems. How to fit a circular access door into a section of ductwork? Trace, Cut, Insert, Tighten! As simple as that! Use the included guide to trace a cutting line on your circular duct, or use the door itself as a guideline, and cut. Your hole should be around 15–20mm smaller than the size of the door. Now that you have the hole cut, you can go ahead and insert the panel at an angle, sandwiching the cut edge between the pressed plates of the access door. Tighten the handwheels to compress the gaskets for an airtight seal. Key Features: • Wide size range: Available for 100mm to 630mm diameter ducts • Versatile fit: Suitable for both spiral and smooth circular ducting • Quick access: Simply unscrew the handwheels to access internally mounted equipment • Service-friendly: Allows easy maintenance and cleaning of HVAC systems • Insulated & airtight: Provides a tight seal that will not affect system performance • Safe & easy install: Trace, Cut, Insert, Tighten! Fast and installer-friendly Access door plate sizes vary by duct diameter — see table below for actual width × length dimensions. Duct Size Access Door Size (W × L) 100mm 180 × 80mm 125mm 180 × 80mm 150mm 250 × 150mm 200mm 250 × 150mm 250mm 250 × 150mm 300mm 250 × 150mm 315mm 250 × 150mm 355mm 250 × 150mm 400mm 300 × 200mm 400 Large 400 × 300mm 450mm 400 × 300mm 500mm 300 × 200mm 500 Large 400 × 300mm 560mm 400 × 300mm 630mm 400 × 300mm Need access to square duct? See our range of square tabbed access panels here Get in touch with the Fresh Air Supplies team if you have any questions regarding our range of access panels — we are always happy to help!