Good spot.Is it Melrose????or Manrose??
My two are Manrose.
To keep the discussion going as there is so much interestI have an awesome metal inline fan servicing the kitchen that I have had for over twenty five years across two properties that I got from a catering suppliers. The commercial stuff is so much better than the retail stuff. Flick the switch on and you can hear it slowly spooling up, fabulous thing.
Supplemented by an over cooker hood that is ducted outside.