Kair Equal T-Piece Adaptor 220mm x 90mm for Rectangular Plastic Ducting Rectangular ducting equal T junction with female sockets for use with Kair System 220 Rectangular Ducting. This item can be used to duct in to different areas and join different duct runs together. We recommend using with Kair System 220 pipe to ensure optimal fit - Part: DUCVKC5704. Made in the UK using Polystyrene/Polypropylene. Max / Min Temperature: +60c / -15c. Compact dimensions. Perfect for flush fitting against ceilings and walls. Suitable to use in compliance with Part F Building Regulations Easy to install, just push-fit together & seal if required using a method of your choice (Popular options include silicone sealant, solvent cement, or tape). Kair System 220 (SYS-220) ducting has comparable airflow performance to 150mm Round Duct. Is designed to be low profile to fit inside ceilings, floor slabs, or to be concealed above kitchen wall units. It is best utilised as part of a ducting system for high powered cooker hood extractors and whole house ventilation systems, such as heat recovery systems or mechanical ventilation systems in offices, houses, and apartments. Compatible with the extensive Kair rectangular range of fittings, outlets, and grilles.