kitchen ext fan

[J.C.E]

evening

when putting in a wall mounted fan in kitchen does it have to be 5in? or is 4in ok? for say rewire? and new build? I am pretty sure 4in is fine in wc/bathroom/utility etc- but not 100pc sure with kitchen?

 

[Swcfisher]

is there a ducted cooker hood?

 

[Octopus]

How big is the room? What is the flow rate you need?

 

[J.C.E]

is there a ducted cooker hood?

not decided yet
guessing if there is- no extractor fan is needed anyways- so 4in would be fine if there was

but if there is no ducted hood....

 

[J.C.E]

How big is the room? What is the flow rate you need?

havn't measure yet- but on smallish size for a 2level 3bed flat

 

[Andy78]

evening

when putting in a wall mounted fan in kitchen does it have to be 5in? or is 4in ok? for say rewire? and new build? I am pretty sure 4in is fine in wc/bathroom/utility etc- but not 100pc sure with kitchen?

For new build you would refer to the minimum permissable extract rates for room types in the building regs. This acts a good guide for any fan install, or you could work out the required rate from room size.

 

[Swcfisher]

not decided yet
guessing if there is- no extractor fan is needed anyways- so 4in would be fine if there was

but if there is no ducted hood....

not necessarily but if you have a ducted cooker hood a fan with a lower extraction rate could be used

 

[Octopus]

Its my understanding that both new builds and extensions now require extraction outside!

 

[J.C.E]

so kitchens need :
30l/s (adjacent to hob); or60l/s (elsewhere)

so https://www.tlc-direct.co.uk/Products/VTEX003T.html which is a 4in would be fine in a kitchen without a cooker hood as its extraction rate is 90m3/hr


edit: figures from http://webarchive.nationalarchives....gportal.gov.uk/uploads/br/br_pdf_adf_2006.pdf

 

[Andy78]

You might want to convert m3/hr to L/s.

 

[J.C.E]

You might want to convert m3/hr to L/s.

cmon now! dont tease me......
(hows that done lol)

edit: https://www.tlc-direct.co.uk/Technical/Ventilation/Ventilation4.html

 

[Andy78]

https://www.google.co.uk/search?sou..._enGB520GB521&aqs=chrome.1.69i57j0l5.6811j0j7

 

[J.C.E]

so kitchens need 60 l\s aka 216m3/h so would normally be 6in+ fan http://www.screwfix.com/p/manrose-lp150stw-25w-axial-kitchen-fan-with-timer/50632

 

[telectrix]

You might want to convert m3/hr to L/s.

or cubic yards per fortnight.

 

[Dave OCD]

How many farts make an ounce ? :tongue3: