PIV unit in a 27sqm flat overkill?

ThisIsWeird

If you are going to spend over £100 on one, why not go for the full works - controllable/programmable via Bluetooth from an App.
When running in the background, it's inaudible. 
https://www.ebay.co.uk/itm/387734180987?

Emmia

ThisIsWeird said:

If you are going to spend over £100 on one, why not go for the full works - controllable/programmable via Bluetooth from an App.
When running in the background, it's inaudible. 
https://www.ebay.co.uk/itm/387734180987?

Remote controls and apps are utterly unnecessary - buy one that is effective and turns itself on and off as needed.

I spend £150 on each of the fans, no apps or smart odour features, just things that turn on and remove moisture automatically. 

A true "fit and forget"

Edit: for heating we have a Nest which is app controlled - this is great, but I don't see the point for an extractor fan.

ThisIsWeird

If your fan 'boosts' during the night and wakes you up...?
If you find it's too sensitive? Not enough? It might even give you a record of humidity levels over time - it's meant to respond to historic levels, and set itself to respond, but not sure if it tells you the info.

Emmia

ThisIsWeird said:

If your fan 'boosts' during the night and wakes you up...?
If you find it's too sensitive? Not enough? It might even give you a record of humidity levels over time - it's meant to respond to historic levels, and set itself to respond, but not sure if it tells you the info.

It only "boosts" when you put the light on to use the bathroom, and even then it's pretty quiet.

It doesn't run constantly. If the humidity level doesn't trigger it, it stays off.

If the bathroom isn't in use (the light is off) and the humidity triggers it, it will come on at a low level, and run until it's dropped back down. It's just reactive in that sense...

I'm not sure  I'd want to remotely control it to switch it on and off,  as it sounds like something else to remember.

The fan doesn't record historical humidity, but I think our Nest thermostat does that.  The Nest  is a more useful "smart" device as if you've been away, you can remotely pop on the heating so the place is warm when you arrive home.

ThisIsWeird

Emmia said:

ThisIsWeird said:

If your fan 'boosts' during the night and wakes you up...?
If you find it's too sensitive? Not enough? It might even give you a record of humidity levels over time - it's meant to respond to historic levels, and set itself to respond, but not sure if it tells you the info.

It only "boosts" when you put the light on to use the bathroom, and even then it's pretty quiet.

It doesn't run constantly. If the humidity level doesn't trigger it, it stays off.

If the bathroom isn't in use (the light is off) and the humidity triggers it, it will come on at a low level, and run until it's dropped back down. It's just reactive in that sense...

I'm not sure  I'd want to remotely control it to switch it on and off,  as it sounds like something else to remember.

The fan doesn't record historical humidity, but I think our Nest thermostat does that.  The Nest  is a more useful "smart" device as if you've been away, you can remotely pop on the heating so the place is warm when you arrive home.

I just think, for the variety of control options it provides, it's worth going for.
For example, it has aight sensor for auto switch on. You can disable with a touch. 
Presumably you can adjust the humidity trigger level, that sort of stuff (haven't actually looked at it in detail).

Emmia

ThisIsWeird said:

Emmia said:

ThisIsWeird said:

If your fan 'boosts' during the night and wakes you up...?
If you find it's too sensitive? Not enough? It might even give you a record of humidity levels over time - it's meant to respond to historic levels, and set itself to respond, but not sure if it tells you the info.

It only "boosts" when you put the light on to use the bathroom, and even then it's pretty quiet.

It doesn't run constantly. If the humidity level doesn't trigger it, it stays off.

If the bathroom isn't in use (the light is off) and the humidity triggers it, it will come on at a low level, and run until it's dropped back down. It's just reactive in that sense...

I'm not sure  I'd want to remotely control it to switch it on and off,  as it sounds like something else to remember.

The fan doesn't record historical humidity, but I think our Nest thermostat does that.  The Nest  is a more useful "smart" device as if you've been away, you can remotely pop on the heating so the place is warm when you arrive home.

I just think, for the variety of control options it provides, it's worth going for.
For example, it has aight sensor for auto switch on. You can disable with a touch. 
Presumably you can adjust the humidity trigger level, that sort of stuff (haven't actually looked at it in detail).

Do you actually have one of these smart app controlled fans?

hang3r

I'm happy to spend a few hundred quid, if it means it is quiet enough that I don't have to think about it, and powerful enough that it eliminates the mould problem and maybe even condensation in my small studio.

So far, the Envirovent filterless comes on top: centrifugal, humidistat, quiet enough continuous run and just powerful enough during boost mode. According to specification sheet - trickle 14l/s at 13dba, and boost mode 41l/s at 35dba.

https://www.electricpoint.com/envirovent-filterless-extract-fan-efht2s.html

https://www.envirovent.com/products/downloads/filterless-extract-fan/152/env901_filterless_fan_technical_data_sheet_v6_2.pdf

ThisIsWeird said:

If you are going to spend over £100 on one, why not go for the full works - controllable/programmable via Bluetooth from an App.
When running in the background, it's inaudible. 
https://www.ebay.co.uk/itm/387734180987?

Note, despite its price and all of its features, it's still an axial fan. And, as we've established earlier, those by design don't work with bent/long ducting like mine.

ThisIsWeird

Emmia said:

ThisIsWeird said:

Emmia said:

ThisIsWeird said:

If your fan 'boosts' during the night and wakes you up...?
If you find it's too sensitive? Not enough? It might even give you a record of humidity levels over time - it's meant to respond to historic levels, and set itself to respond, but not sure if it tells you the info.

It only "boosts" when you put the light on to use the bathroom, and even then it's pretty quiet.

It doesn't run constantly. If the humidity level doesn't trigger it, it stays off.

If the bathroom isn't in use (the light is off) and the humidity triggers it, it will come on at a low level, and run until it's dropped back down. It's just reactive in that sense...

I'm not sure  I'd want to remotely control it to switch it on and off,  as it sounds like something else to remember.

The fan doesn't record historical humidity, but I think our Nest thermostat does that.  The Nest  is a more useful "smart" device as if you've been away, you can remotely pop on the heating so the place is warm when you arrive home.

I just think, for the variety of control options it provides, it's worth going for.
For example, it has aight sensor for auto switch on. You can disable with a touch. 
Presumably you can adjust the humidity trigger level, that sort of stuff (haven't actually looked at it in detail).

Do you actually have one of these smart app controlled fans?

Er...um...uh...nope.

But my bro just had two installed. So far so impressive.

ThisIsWeird

hang3r said:

I'm happy to spend a few hundred quid, if it means it is quiet enough that I don't have to think about it, and powerful enough that it eliminates the mould problem and maybe even condensation in my small studio.

So far, the Envirovent filterless comes on top: centrifugal, humidistat, quiet enough continuous run and just powerful enough during boost mode. According to specification sheet - trickle 14l/s at 13dba, and boost mode 41l/s at 35dba.

https://www.electricpoint.com/envirovent-filterless-extract-fan-efht2s.html

https://www.envirovent.com/products/downloads/filterless-extract-fan/152/env901_filterless_fan_technical_data_sheet_v6_2.pdf

ThisIsWeird said:

If you are going to spend over £100 on one, why not go for the full works - controllable/programmable via Bluetooth from an App.
When running in the background, it's inaudible. 
https://www.ebay.co.uk/itm/387734180987?

Note, despite its price and all of its features, it's still an axial fan. And, as we've established earlier, those by design don't work with bent/long ducting like mine.

I'm not sure that has been established at all?
And all these fans are 'axial', including yours.
But, I am not saying that the Vent-Axia is the best, as I just don't know. All I'm suggesting is, if you are going for a £100+ model, then it should be considered, as it's super quiet, very effective, and has a lot of control.
Bottom line in extractor-fan effectiveness, tho', is its flow rate, so compare these. And how sensitive any auto humidistat is. 
And quiet is also good. :-)

hang3r

ThisIsWeird said:

Note, despite its price and all of its features, it's still an axial fan. And, as we've established earlier, those by design don't work with bent/long ducting like mine.

I'm not sure that has been established at all?
And all these fans are 'axial', including yours.
But, I am not saying that the Vent-Axia is the best, as I just don't know. All I'm suggesting is, if you are going for a £100+ model, then it should be considered, as it's super quiet, very effective, and has a lot of control.
Bottom line in extractor-fan effectiveness, tho', is its flow rate, so compare these. And how sensitive any auto humidistat is. 
And quiet is also good. :-)

If you look at one of the earlier reply from @ic, or a quick google search will confirm from different sources that axial fans are best for straight runs like directly through a wall to outside, or at most very short ducting with little in the way of bends. Compared to centrifugal ones that are able to handle long ducting.

According to the manufacturer's official website it is a centrifugal fan not an axial one. I don't see why they would mislead over such a basic thing that can be easily and quickly confirmed by anyone who bought it.

From simple through the wall installations to complex ducting/bend systems the EnviroVent Filterless Extract Fan will deliver the performance to meet building regulations and beyond. The centrifugal impeller with its unique helical power expansion chamber enables the unit to achieve power with efficiency and quietness in the most compact unit ever.

https://www.envirovent.com/products/extractor-fans/filterless-extract-fan/