ventilation Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[gerrybhoy]

I am thinking of installing a 150mm inline fan to an internal bathroom. Could i use a reducer to take advantage of existing 100mm hole on exterior wall.It will need 7m of ducting and will have 2 elbows.The fan has 265m3 extraction rate.Is this powerful enough? thanks gerry.

[plumbers1]

7m is a long way for one of these inline duct fans, what you are planning will not work very well but it will extract something. If it is to bring something into line with building regs it will not be good enough but if it is to get rid of the odd fart molecule it might.

[gerrybhoy]

Thanks for your reply. Any advice on fan required.The 7m consists of 3m vertical and 4m horizontal below floor to exterior wall. Is larger outlet required. thanks gerry.