Humidistat or Run on Timer

[thomaspotato]

Evening all. I have a customer whose bathroom is soaked with condensation after the shower has been on. its worst I have seen.
I am going to install a 4 inch 60litre/sec fan but would like an opinion on whether to go with a humidistat or run on timer. I would appreciate your expertise. Thanks

 

[Octopus]

Condensation is mainly caused by hot air coming into contact with cold surfaces. What heating does the bathroom have?

 

[thomaspotato]

Condensation is mainly caused by hot air coming into contact with cold surfaces. What heating does the bathroom have?

No heating in the bathroom and single glazed window. Good point I'll speak to them about that cheers

 

[Charlie_]

In line fan or surface unit?
What is the size of the bathroom?

 

[Octopus]

No fan, will ever clear an unheated room

 

[thomaspotato]

In line fan or surface unit?
What is the size of the bathroom?

surface unit, roughly 15m cubed

 

[Charlie_]

No fan, will ever clear an unheated room

Agreed..
A very widespread misconception, so many times I’ve explained the fans are not there to extract steam out the bathroom..
I call them ventilation fans, there to create so many air changes per hour..
See a lot of fans located in the totally wrong location, such as above the bathroom door, right over the bath..

An open window is always the best solution

 

[Charlie_]

I recommend a trickle unit with boost function for humidity and occupancy

 

[thomaspotato]

Agreed..
A very widespread misconception, so many times I’ve explained the fans are not there to extract steam out the bathroom..
I call them ventilation fans, there to create so many air changes per hour..
See a lot of fans located in the totally wrong location, such as above the bathroom door, right over the bath..

An open window is always the best solution

Magic thanks! what is the best position for a ceiling fan in a bathroom?

 

[Toneyz]

You need a flow of air fresh air in stale air out

 

[ChrisElectrical88]

https://www.groupon.co.uk/deals

I recommend a trickle unit with boost function for humidity and occupancy

Spot on, try the vent axia lo carbon HTP. Quality fan which will run constant at about 20 percent, will auto boost on the humidistat and the pull chord will manually boost for up to 30 minutes aswell.

 

[HappyHippyDad]

Magic thanks! what is the best position for a ceiling fan in a bathroom?

Also the fan will not move the air effectively unless there is an inlet vent for it to draw the air from. Either an open window, gap under the door, vent in door etc.
A rather strange example but I was administering medication to some prisoners in a small nurses unit (behind bars). It was sweltering hot. Just the bars to dish the meds out and the main barred door to get in and out. I had the portable fan blowing right at me. The Health Care assistant then moved the fan over to the door facing the fan away from us and pointing out of the door. It pulled air from the medication hatch across the small room and out of the door and felt wonderful! When we shut the medication hatch the fan had nowhere to draw the air from and so we felt nothing.
That rather long story was to say.... fit a vent otherwise it wont work!

 

[Octopus]

Also the fan will not move the air effectively unless there is an inlet vent for it to draw the air from. Either an open window, gap under the door, vent in door etc.

Very bad idea in the winter ......... the last thing you need in a warm steamy bathroom is cold, moist air.

Drawing warm dry air from inside the property is much more effective

 

[freddo]

A good dehumidifier will remove huge quantities of moisture from a room. I'm a big fan of the desiccant wheel type. I have one here that will easily remove 3-4L of water in 24 hours.

 

[Toneyz]

A good dehumidifier will remove huge quantities of moisture from a room. I'm a big fan of the desiccant wheel type. I have one here that will easily remove 3-4L of water in 24 hours.

What in your bathroom?

 

[freddo]

It did when I first moved in, previous owners never replaced the faulty fan and everything was very damp. All dry now though.

 

[Toneyz]

It did when I first moved in, previous owners never replaced the faulty fan and everything was very damp. All dry now though.

Ok, I assume that you know have a decent fan installed with a
flow of air.

 

[freddo]

Yes, Vortice Lineo 100t, (I know a lot of people here don't like those!) long overrun. Runs at high speed when light or fan switch is on, drops to low speed for the 30 minute override. works well. Very quiet.

 

[Toneyz]

Yes, Vortice Lineo 100t, (I know a lot of people here don't like those!) long overrun. Runs at high speed when light or fan switch is on, drops to low speed for the 30 minute override. works well. Very quiet.

seems a good choice.