SpiroFlex adapter F 60/100-80/125 with ducts, white

SpiroFlex adapter F 60/100-80/125 with ducts, white is a ventilation duct adapter designed to connect circular ducts of different diameters in HVAC systems. The adapter features stepped outlets that allow connection between 60/100 mm and 80/125 mm ducts and includes short duct spigots for secure attachment. Finished in white, it is intended for exhaust and supply air systems in residential and light commercial installations where a compact and reliable transition between duct sizes is required.

Advantages

The adapter provides a simple mechanical solution for joining ducts of two common circular sizes without the need for custom fabrication. Its stepped design ensures stable alignment and reduced air leakage at the transition point when properly sealed. The included short spigots facilitate quick assembly and secure clamping or sealing with standard duct connectors, tape or sealant. The white finish offers a neutral appearance for visible sections and helps resist minor surface soiling.

Suitable for

• Connecting circular ventilation ducts 60/100 mm to 80/125 mm
• Residential exhaust and supply air systems
• Light commercial HVAC installations and renovation projects
• Bathroom, kitchen or laundry extractor fan connections

Key specifications

• Material: durable HVAC-grade plastic (white finish)
• Outlet diameters: stepped outlets for 60/100 mm and 80/125 mm circular ducts
• Includes short duct spigots for secure attachment
• Type of connection: stepped spigot for clamp, tape or sealant fastening
• Application: circular duct transition for supply or exhaust air

How to use

Position the adapter so the matching stepped outlet aligns with each duct diameter. Insert the corresponding duct ends onto the spigots until a flush fit is achieved. Secure each connection using an appropriate clamp, metal tape or HVAC sealant to minimise air leakage. Ensure the adapter is oriented to maintain airflow direction and avoid sharp bends immediately adjacent to the transition. Inspect joints after installation and perform a pressure or smoke test if required by the project specifications.

Usage recommendations

Use compatible clamps or standardized duct tape and sealants for airtight joints. Avoid excessive bending or compression of ducts at the adapter to prevent restriction of airflow. For installations in mechanically ventilated systems, confirm that the transition does not create undue noise or pressure drop; consider insulating or supporting adjacent duct runs where necessary.