Kair Rectangular 220mm x 90mm - 9 x 4 inch Flat Ducting 45 Degree Vertical (Upward) Elbow Bend. Both sides are female sockets. The ends will fit over 220mm ducting system 220mm x 90mm flat ducting pipe Part: DUCVKC5704. Kair System 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. This bend can be used as a part of a long ductwork run for a variety of purposes including whole house ventilation, passive stack vent, positive input, air conditioning, HVAC, and Heat Recovery Systems. Static Pressure Drop in Pascals: 60 l/s = 1.9 Pa - 120 l/s = 6.5 Pa - 180 l/s = 13.7 Pa. Airflow performance independently tested by BSRIA or BRE Max / Min Temperature: +60c / -15c. Made in the UK using strong high-quality white polystyrene / polypropylene material. Installation Tips: Kair plastic ducting pipe is lightweight & easy to install. You simply push-fit the duct pipe and fittings together. For permanent fixings, you can seal the joints with a method of your choice (Popular options include silicone sealant, solvent cement, or tape). Rectangular plastic ducting can be carefully cut to the required size using a hacksaw. Offcuts are always useful to keep to hand for joining two female fittings together. If your duct run passes through a particularly cold area, we would recommend considering using our pre-insulated ducting to avoid condensation building up within your ductwork.