Shed ventilation

[Mee]

Why not use both? one of my old workshops had both systems installed, the fans were reversed at one end to suck air in to the workshop while at the other end I had several to suck air out.

 

[rtcosic]

I fitted a 12v cooling fan to the end wall opposite the door. It was a Rover 800 spare I had lying around. I have several old batteries lying around and a decent battery charger.
It draws so much air that if you close the shed door before switching it on you have to lean hard on the door to open it again! I had to add louvres to the door end wall.

As a hobbyist I would only be welding for short 'bursts' and as a fully charged battery runs the fan for about an hour and a half, one overnight charge last me all day.

 

[gaz1]

downdraft mode

can be homemade

 

[dazza]

I'm using a bathroom extractor fan.

 

[rtcosic]

I'm using a bathroom extractor fan.

For information:
a typical cheap 4" bathroom extractor fan draws c. 80 m3/hour. (50 cfm)

http://www.screwfix.com/p/manrose-x...tracking url&gclid=CIuW69a71dECFWsq0wodQcMMwQ

a cheap inline 4" fan - a better option if adding ducting - draws c. 245 m3/h (150 cfm)

https://www.voltelectrical.co.uk/pr...r/2576180905?gclid=CJz45cG81dECFQk8GwodXjcP6A

a typical 14" car cooling fan shifts c. 3000 m3/hour (1800 cfm). Cannot really be ducted but excellent for whole room ventilation.

https://www.amazon.co.uk/Universal-Slim-Electric-Radiator-Fitting/dp/B00I8L7CV8

 

[8ob]

Anything wrong with a big cooker hood over the bench and duct the fumes away ? Some are variable speed so wont be howling away...........Some even have down lighters on them which could be handy.

Just thoughts

I will get my coat.

Cars running



Bob

 

[gaz1]

actually bob a good idea is that another use is a blower for black smithing

 

[dazza]

For information:
a typical cheap 4" bathroom extractor fan draws c. 80 m3/hour. (50 cfm)

http://www.screwfix.com/p/manrose-xf100s-20w-axial-bathroom-fan/11097?kpid=11097&cm_mmc=Google-_-Product Listing Ads-_-Sales Tracking-_-sales tracking url&gclid=CIuW69a71dECFWsq0wodQcMMwQ

a cheap inline 4" fan - a better option if adding ducting - draws c. 245 m3/h (150 cfm)

https://www.voltelectrical.co.uk/products/Ventilation/Extractor+Fans/Manrose+4"+Inch+(100mm)+MixFlo+Extractor+Fan+with+Timer/2576180905?gclid=CJz45cG81dECFQk8GwodXjcP6A

a typical 14" car cooling fan shifts c. 3000 m3/hour (1800 cfm). Cannot really be ducted but excellent for whole room ventilation.

https://www.amazon.co.uk/Universal-Slim-Electric-Radiator-Fitting/dp/B00I8L7CV8

I used an inline fan. 220m3/hr.

https://www.amazon.co.uk/gp/product/B00DIC4WEC/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

 

[8ob]

actually bob a good idea is that another use is a blower for black smithing

@gaz1 I was thinking of this sort of thing http://www.smasltd.com/?AspxAutoDetectCookieSupport=1

Bob

 

[roryswfc]

Cheers for all the ideas. Ironically I just ended up welding outside today.

 

[Pete.]

downdraft mode

Won't that affect your shielding gas the same way?