Replacing roof vent with fan

[BAThomas]

Hi I'm after some advise, I'm looking to replace my Dometic Midi roof vent with a fan unit but I'm having trouble finding one that will fit the 700mm x 500mm existing roof opening, my reason for picking this vent is the lid is already cracked with estimated cost of £200+ for a replacement which would be a good way in purchasing the fan unit but is it possible or am I dreaming and will have to replace it and convert one of the other vent that are smaller ie 400x400 opening. tia.

 

[Jim]

I think you might struggle to find one bigger than 400 by 400

 

[Maitken1]

I haven't seen one bigger than 400 x 400. I replaced a Fiamma one a few years ago and it was quite simple. I have a new van with the dometic skylights and their version doesn't look as good as Fiamma. We use this one now https://www.rainbow-conversions.co.uk/rooflights-vents/fiamma-turbo-kit.html It works great in the smaller skylights and you can move it to another area.