Dmev fan vs Inline fan

[noddy997]

I am after 2 x new extractors, the dmev offers the continuous trickle option but their extraction rate is less powerful than an in line fan.

Are there any inline fans in the market that offer humidity stat or continuous trickle?

Also can rigid ducting be used for inline fan or does it have to be the flexi stuff? Am looking to vent through the roof and want to avoid condensation back flowing.

 

[Murdochcat]

Why Are you asking about continuous trickle for an inline fan?

An inline fan will normally allow continuous venting without being on

 

[noddy997]

Why Are you asking about continuous trickle for an inline fan?

An inline fan will normally allow continuous venting without being on

How will it allow continuous trickle without being on particular if vented vertically through roof?

 

[Taylortwocities]

An inline fan will normally allow continuous venting without being on

No they don't

 

[Murdochcat]

No they don't

Oh yes they do as long as there is no back draft fitted

 

[RandomGrinch]

Also can rigid ducting be used for inline fan or does it have to be the flexi stuff? Am looking to vent through the roof and want to avoid condensation back flowing.

Rigid pipe is usually far better than flexible, although some flexible around the inline fan, will help avoid vibration in the pipework.
It may also benefit from a layer of insulation surrounding it.
If the vent is going straight upwards through the roof, look at 'vent pipe condensation traps'...

 

[Taylortwocities]

Oh yes they do as long as there is no back draft fitted

There's always one in the duct run, maybe at the fan and/or at the outlet flap. Any supplementary air flow would be defeated by a duct run of more than a couple of metres . it needs to be a proper, powered, trickle.

 

[noddy997]

Rigid pipe is usually far better than flexible, although some flexible around the inline fan, will help avoid vibration in the pipework.
It may also benefit from a layer of insulation surrounding it.
If the vent is going straight upwards through the roof, look at 'vent pipe condensation traps'...

View attachment 357776

Where does the condensate trap run off to? Does it need venting off?

Insulate the rigid pipe or the flex? Would rigid ducting be any good for inline fan?

 

[RandomGrinch]

Where does the condensate trap run off to? Does it need venting off?

Ideally, it would run to a drain. However, as the condensate should be minimal, and harmless (unlike the acidic condensate from a gas boiler), the outlet pipe could be run out of the wall, or soffits - try and make the pipe stick out far enough, to avoid drips falling against the wall.

Here's a snippet from an installation guide...