SpiroFlex adapter SpiroFlex 60/100 IM — duct transition 60/100 mm

SpiroFlex adapter SpiroFlex 60/100 IM — duct transition 60/100 mm is a ventilation accessory designed to connect round ducts and components with 60 mm and 100 mm diameters. The adapter creates a mechanical transition between two different circular duct sizes, allowing air to be routed between small-diameter ventilation outlets and larger duct runs. It is intended for use in HVAC installations, extract fan connections and small inline duct systems where conversion between 60 mm and 100 mm ductwork is required.

Advantages

The adapter provides a secure mechanical join between mismatched duct sizes without the need for custom fabrication. Its compact form factor minimizes additional length in the duct run and helps maintain airflow continuity. The design enables straightforward installation and reliable sealing at the connection points, reducing the risk of air leakage when installed correctly. The adapter is compatible with standard round ducts of the specified diameters and supports both supply and extract airflows.

Suitable for

• Connecting 60 mm ventilation outlets (such as small fans or vents) to 100 mm duct runs
• Adapting extractor fans to existing ductwork in bathrooms and kitchens
• Transitioning between inline duct components of different diameters
• Temporary or permanent duct modifications during HVAC upgrades or repairs

Key specifications

• Compatible diameters: 60 mm and 100 mm circular duct connections
• Function: mechanical duct transition for round ducts
• Application: ventilation, exhaust, inline duct systems
• Installation: designed for direct connection to standard round ducts with appropriate sealing
• Form factor: compact inline reducer to minimize added duct length

How to use

Verify that the mating ducts and components match the 60 mm and 100 mm diameters before installation. Insert each end of the adapter into or over the corresponding duct or component and ensure a snug fit. Use suitable duct clamps, hose clips, or compatible sealing materials at both connections to secure the adapter and prevent air leakage. Position the adapter so that airflow follows the intended direction and avoid sharp bends immediately adjacent to the transition to minimize flow resistance.

Usage recommendations

Inspect connections after installation and periodically thereafter to confirm clamps and seals remain tight. For improved airtightness and noise control, combine the adapter with appropriate duct sealant or HVAC tape and flexible connectors where needed. If the installation involves insulated ducting or high condensation risk, ensure insulation continuity and consider moisture-resistant sealing methods.