Cooker extractor hood not fit for purpose - what's the best resolution?

JHW1942

itm2 said:

This is how the installation looks. The distance from the bottom of the extractor to the top of the hole venting out through the wall is about 75cm. I'm not sure why the installer vented it so high up (there was no prior vent hole in the wall before they started work). There was/is a power socket about halfway up the wall, though, so maybe he just couldn't be bothered to move it?
So the comments above suggest that responsibility for this may lie with the kitchen supplier (who designed, specified and installed the whole lot)?

Sorry, but that's terribly done, and I'd be amazed if Bosch considered the fault to be with their appliance.  I can see duct tape for a start!  Concertina ducting creates air vortices which hinder airflow, it does look as if there's more ducting length than needed, as well.  I'd bet that the way that's installed doesn't meet the manufacturer's specifications for ducting, clearance, etc.

On the basis of that photo, the fault is the installer's.  Sorry to say that if the rest of the kitchen has been installed as shoddily as that unit has been, you may have other problems to contend with.

born_again

How high is it above the hob? Recommended is between 650 & 750 m/m
Never seen one mounted in a cupboard like that. Looks a right bodge job.

itm2

born_again said:

How high is it above the hob? Recommended is between 650 & 750 m/m
Never seen one mounted in a cupboard like that. Looks a right bodge job.

It's about 36cm above the hob. Interesting that the Bosch engineer didn't make any comments about the installation. He seemed to think it looked perfectly OK/normal.

JHW1942

itm2 said:

born_again said:

How high is it above the hob? Recommended is between 650 & 750 m/m
Never seen one mounted in a cupboard like that. Looks a right bodge job.

It's about 36cm above the hob. Interesting that the Bosch engineer didn't make any comments about the installation. He seemed to think it looked perfectly OK/normal.

Is that all?  That will be another contributing factor.  36cm is hardly anything.  I've got a steamer pan set that wouldn't fit under that!

What does the installation manual say about minimum clearance to the hob?

itm2

JHW1942 said:

itm2 said:

born_again said:

How high is it above the hob? Recommended is between 650 & 750 m/m
Never seen one mounted in a cupboard like that. Looks a right bodge job.

It's about 36cm above the hob. Interesting that the Bosch engineer didn't make any comments about the installation. He seemed to think it looked perfectly OK/normal.

Is that all?  That will be another contributing factor.  36cm is hardly anything.  I've got a steamer pan set that wouldn't fit under that!

What does the installation manual say about minimum clearance to the hob?

The installation manual doesn't say anything about minimum clearance to the hob (or maximum length of the ducting tube). We also asked the Bosch engineer whether it was too close to the hob, and he said it was fine.
The diagrams in the installation manual show the extractor being fitted into a cupboard, so that's clearly the way it is intended for use.

JHW1942

In which case, all you can do is await the report and hope that it says the unit is faulty.  If I were a betting person, though, I'd say that a like-for-like replacement will behave exactly the same.  36cm is far too close to the hob and the way the ducting has been done is shoddy.  You're going to need either a revised installation or a more powerful extractor unit.  Or both.

coffeehound

This is from the web page for this model:

itm2

coffeehound said:

This is from the web page for this model:

Have you got a URL for this? (I couldn't find it on the page from the Bosch site that I posted in the OP). It would be useful to send to the kitchen supplier.

coffeehound

Yes it's from your link in the first post.  Scroll horizontally through the images and it's the last on the right, if you see what I mean

itm2

coffeehound said:

Yes it's from your link in the first post.  Scroll horizontally through the images and it's the last on the right, if you see what I mean

Doh! Sorry - I've now got it. Thanks!