Ventilation of WC and bathroom
I am new to the forum. Apologies if I am asking out of turn or if I am contravening the rules without realising.
I am in London, UK.
I have a WC that shares a wall with a bathroom. Both need ventilation installed because the communal ventilation system falls out of service regularly and takes weeks to get fixed. I want my backup plan.
These are my thoughts:
1- install extractor in wc
2- duct the extracted air from wc through wall adjoining bathroom and go inside the bathroom
3- install extractor in bathroom
4- join both extracted air flows into joint duct
5- duct the extracted air of both fans through bedroom adjoining bathroom and ventilate via the exterior wall of the bedroom.
Can anyone please advise me how to implement this plan?
Note I am a new homeowner and I am instructing a contractor (for ducting) and an electrician. Although I could bring in a ventilation expert, I am trying to project manage the job myself to cut costs.
Thanks for reading this far.