Is this fan any good

[stuartR1963]

The bathroom is 2 metres by 2 metres and the height is 2.4 metres. The ensuite has the same fan and is slightly smaller in size 2 meters by 1.4 meters, the ceiling is 2.4m.
Cheers

 

[ericmark]

In the main the fan has two jobs, one remove smells, the other remove moisture, in both cases the air needs to get back into the room, be it a wall vent or door vent some where air needs to return into the room, and that air needs heating in winter, so we should really use heat recovery units so air going out heats air coming in, and we are sure of the path for return air, however we all try doing it on the cheap, and so we compromise, as to if the compromise is good enough depends on usage, so for my wife and I in a house with three bathrooms we really don't need a fan, non of the bathrooms get enough use to get a damp problem, and our food preference means smells are minimum.

In last house fan was turned off, there was no mould build up, and enough air movement without it needing to run, house before that really did need a fan, but did not have one, and before that it had hot air central heating and the problem was to stop house being super dry, so there is no straight answer to your question, however in the main if room is remaining damp and you have mould problem, it is usually because home is too well sealed and air can't get back into the room.

 

[stuartR1963]

I guess time will tell.

 

[JohnD]

Is this fan any good

Can't tell by looking at the pic. It seems to be on the ceiling so presumably there is some duct to the outside. How long is the duct; is it straight rigid or is it flexi or does it have bends?

I will guess the square housing of your fan is 150mm and the spigot is 100mm.
i don't know the make, model or performance.

Usually they have a free-air throughput of 60-80 cu.m/hr which is adequate for a WC or a small bathroom without shower. A few are available up to 100 cu.m/hr

If you have steamy showers you need more throughput.

If you have access to the space above the ceiling you can fit an inline fan, which will have at least twice the poweer, maybe three or more times. Throughput of about 240 cu.m/hr is quite common. If you don't have access above the ceiling you can fit a larger fan, preferably 150mm. If you can't do either, run the fan continuously, or for the maximum possible timed period, and have it come on with the light switch so it runs frequently. Modern fans can be very quiet and use negligible electricity.

An extractor mounted in the ceiling, face down, will last longer and quieter if it is one of the modern ball-bearing types.

The fan must of course be ducted to the outside and must not vent into a loft space.

If it was fitted by a builder it is likely to be the cheapest he could find.

p.s.
I think yours is a Greenwood brand (now Greenwood Airvac)

 

[stuartR1963]

It is a greenwood, i am unsure the exact module as i have not opened it, but if it was fitted by a builder then its probably crap, but we shall see.