Hi

About to install a new kitchen. I want to install a "canopy" cooker hood extracting to the
outside. This means that the ducting would need to come off the hood top, rise vertically then
have a 90deg bend and run horizontally for about 1.5m (including through the kitchen wall), then
another 90deg bend and through the outhouse wall, with a suitable grille.

Help wanted....
1. Can I gen a hood that has no fan, just the filters and lights and put a centrifugal fan
towards the outside end of the ducting or a suitable fan built into the outer-end of the ducting
2. General advice please on duct sizes and fan specs? (I'm assuming a 6" flexible metal
duct)
3. Anything building regs to watch for?

--


Regards
John

On Sun, 24 Aug 2003 14:54:10 +0100, "Me"
wrote:

Hi

About to install a new kitchen. I want to install a "canopy" cooker hood extracting to the
outside. This means that the ducting would need to come off the hood top, rise vertically then
have a 90deg bend and run horizontally for about 1.5m (including through the kitchen wall), then
another 90deg bend and through the outhouse wall, with a suitable grille.

Help wanted....
1. Can I gen a hood that has no fan, just the filters and lights and put a centrifugal fan
towards the outside end of the ducting or a suitable fan built into the outer-end of the ducting
2. General advice please on duct sizes and fan specs? (I'm assuming a 6" flexible metal
duct)
3. Anything building regs to watch for?
As I said to someone else recently in connection with a bathroom, I
suggest you download the zipped ducting.pdf from
www.domusventilation.com which is both a parts list with prices and a
user guide to help work out your requirements. I ended up buying one
of their kits (through a local builders merchants) for large
cross-section ductring for our new cooker hood - a flexible vertical
round section connected to horizontal rectangular ducting plus grill
and flap valve.

Me wrote:

Hi

About to install a new kitchen. I want to install a "canopy" cooker hood extracting to the
outside. This means that the ducting would need to come off the hood top, rise vertically then
have a 90deg bend and run horizontally for about 1.5m (including through the kitchen wall), then
another 90deg bend and through the outhouse wall, with a suitable grille.

Help wanted....
1. Can I gen a hood that has no fan, just the filters and lights and put a centrifugal fan
towards the outside end of the ducting or a suitable fan built into the outer-end of the ducting
2. General advice please on duct sizes and fan specs? (I'm assuming a 6" flexible metal
duct)
3. Anything building regs to watch for?

--

Regards
John

De Dietrich have (IIRC) two extraction units that are suitable for exterior mounting and a number of
empty hoods that can be used with the extractors.

Rdgs Richard

"Brian S Gray" wrote in message
...
| On Sun, 24 Aug 2003 14:54:10 +0100, "Me"
| wrote:
|
| Hi
|
| About to install a new kitchen. I want to install a "canopy" cooker hood extracting to the
| outside. This means that the ducting would need to come off the hood top, rise vertically
then
| have a 90deg bend and run horizontally for about 1.5m (including through the kitchen wall),
then
| another 90deg bend and through the outhouse wall, with a suitable grille.
|
| Help wanted....
| 1. Can I gen a hood that has no fan, just the filters and lights and put a centrifugal fan
| towards the outside end of the ducting or a suitable fan built into the outer-end of the
ducting
| 2. General advice please on duct sizes and fan specs? (I'm assuming a 6" flexible metal
| duct)
| 3. Anything building regs to watch for?
| As I said to someone else recently in connection with a bathroom, I
| suggest you download the zipped ducting.pdf from
| www.domusventilation.com which is both a parts list with prices and a
| user guide to help work out your requirements. I ended up buying one
| of their kits (through a local builders merchants) for large
| cross-section ductring for our new cooker hood - a flexible vertical
| round section connected to horizontal rectangular ducting plus grill
| and flap valve.

Brian

Thanks for this. Looks like I'm facing 110Pa at 60l/sed. Now if all the hood manufacturers put
their flow characteistic graphs on the web, life would be much easier. As it is, seems only
Xpelair have graphs.

Thanks
John