Nov 14, 2015 5:03 pm
I start building my new home next month and the builders have said it's enough with the exhaust fan but my wife is still concerned about moisture from the shower making everything moldy because the window we are getting is a tall thin one which doesn't open and also it's connected to a walk through wardrobe. I have said the exhaust fan will be heaps, am I right or not?
Below is the the plan for the main bedroom, any insight from anyone here?
Re: Is this enough ventilation for bathroom?2
Nov 14, 2015 5:54 pm
I have had a similar layout and one fan with no problem.
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Re: Is this enough ventilation for bathroom?4
Nov 15, 2015 11:33 am
Should be fine, just make sure you actually run the fan.
We built the Rathdowne with Simonds Express in Western Melbourne
Site start Oct. 2015
Keys Jan. 25th, 2015
My build thread -here-
Re: Is this enough ventilation for bathroom?6
Nov 16, 2015 10:07 am
If the door between the robe and bedroom is generally left open, and the door between bathroom and robe closed while showering, then there shouldn't be too much of a problem with moisture levels in the robe.
Apart from making the window operable, another way of getting some ventilation would be a duct out to under the eaves. In particular this would allow air to be drawn in through this duct to allow the exhaust fan to work while the door is closed. You'd have to be able to close off the vent when not needed though, for thermal control.
Re: Is this enough ventilation for bathroom?7
Nov 16, 2015 12:59 pm
Can you change that window to a single hung or awning so that you don't lose the effect of the tall pane of glass, but you can get some fresh air in there?
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Re: Is this enough ventilation for bathroom?8
Nov 16, 2015 2:22 pm
When it comes to ventilation, you should measure air changes per hour (ach). For wet areas recommended ach rate is between 6 and 10. So considering your bathroom is approx. 3mx1.5m your total volume of air is about 12 m3 (if ceiling height is 2.7m). 6 minimum air changes equals to 72m3/h. A very basic fan can handle about 80m3/h but you should check with manufactureer what exactly your fan's rate is.
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