The Manrose Round to Rectangular Adaptor is an essential fitting for modern ventilation systems, providing a quick and secure transition from 100mm (4″) round pipework to 110 x 54mm rectangular flat channel ducting. Designed with space-saving efficiency in mind, this compact adaptor is ideal for use in areas where standard round ducting is too bulky, such as ceiling voids, wall cavities, and underfloor runs.

This component plays a key role in maintaining efficient airflow while allowing the installer to use low-profile ducting solutions without compromising on performance. Its short form factor and female connection ends allow for easy integration with standard rigid piping and flat channel systems in domestic or commercial settings.

Key Features

• Efficient Round-to-Flat Transition
  Allows connection from a standard 100mm (4″) round duct to 110 x 54mm flat channel ducting, ideal for confined spaces.
• Compact Design
  Short length makes this adaptor suitable for tight or awkward installation zones while maintaining effective airflow.
• Universal Compatibility
  Connects easily with most 100mm rigid round ducting and 110 x 54mm rectangular systems across the Manrose range and compatible brands.
• Durable Construction
  Manufactured from high-quality, impact-resistant PVC plastic for long-term use and resistance to wear, moisture, and temperature fluctuations.
• Lightweight and Easy to Install
  Weighs just 40g, enabling a simple, tool-free installation. Can be sealed with standard ducting tape or mastic sealant to enhance airflow efficiency and prevent leaks.

Technical Specifications

Attribute Specification Duct Compatibility 100mm (4″) round to 110 x 54mm flat Connection Type Female (both ends) Material ABS/PVC Plastic Colour White Application Ventilation, HVAC, extractor fans Boxed Weight 40g Dimensions Short form, ideal for compact spaces

Typical Applications

• Kitchen, bathroom, or utility room extract systems
• Ceiling voids, wall chases, underfloor runs
• Retrofit or new-build ventilation projects
• Ideal for use with extractor fans, in-line fans, and cooker hoods

Installation Notes

• Attach the 100mm (4″) round ducting to the circular opening and secure with sealant or a clamp.
• Insert the 110 x 54mm flat channel duct into the rectangular end until secure.
• Ensure all joints are sealed for optimum airflow and energy efficiency.
• Compatible with flexible or rigid duct systems.

Frequently Asked Questions (FAQ)

Q: Is this adaptor suitable for extractor fan systems?
A: Yes, this adaptor is frequently used in fan installations to switch from round to flat ducting for space-saving solutions.

Q: Does it come with seals or fixings?
A: No, seals or fixings are not included. We recommend using duct tape or silicone sealant for airtight installation.

Q: Can this be installed vertically and horizontally?
A: Yes, this adaptor can be mounted in any orientation, provided it is correctly supported and sealed.

Warranty Information

All Manrose components are manufactured to rigorous quality standards. This product is backed by a 1-year manufacturers warranty, covering defects in materials and workmanship under normal use conditions.