AO603MR Genuine Deflecto Semi Rigid Aluminium Duct 150mm x 3m for Rangehood and Exhaust Fan Ducting

Deflecto AO603MR is a semi rigid aluminium duct, 150mm in diameter and 3m long. Semi rigid duct bends by hand into shape and holds it, so it can be routed around joists and obstacles without needing extra fittings at every turn. 150mm is a common size for rangehood and exhaust fan ducting, which makes this a handy length for replacing a crushed or torn run.

Why ducting condition matters for your rangehood

A rangehood can only clear steam, grease and cooking smells if the air has an easy path out. Crushed, kinked or torn ducting chokes the airflow, so the motor works harder, gets louder and pulls less. Grease and moisture can also collect in sagging flexible duct. Signs your duct needs replacing include a rangehood that sounds strained but barely draws, condensation dripping back, smells hanging around the kitchen and visible damage in the roof space. Semi rigid aluminium holds its shape better than lightweight foil duct.

Part details

• Deflecto part AO603MR
• Semi rigid aluminium duct
• 150mm diameter
• 3m length

Installing the duct

Switch off the rangehood or exhaust fan at the wall before disconnecting the old duct. Keep the run as short and straight as you can, with gentle bends rather than tight ones. Join it to the spigots with proper duct clamps or aluminium tape, and support long runs so they don't sag. Wear gloves, as cut aluminium edges are sharp.

Questions about this part

Will 150mm duct fit my rangehood?

Check the size of the outlet spigot on top of your rangehood or the ceiling fitting. If it measures 150mm, this duct suits it. Avoid stepping down to a smaller duct than the outlet, as that restricts airflow and adds noise.