burner safety

[naughtyboy]

going to use large gas bottle to make burner for shed.
will it be safe enough to run 2" pipe from top to 90 degree bend out of wall to get rid of fumes?

door is usually open on shed when im in there anyway.

cheers.

 

[superls]

i dont think a 2" flue is goin gto be enough mine is nearer 5 inch, although ive got a buterfly flap in it to shut it down if needed

 

[Shedendman]

2" is far to small min you just about get away with would be 4",pref 5"or 6"

 

[naughtyboy]

cheers was going 2" as got a load will look at scrounging some bigger from work.

 

[superls]

if you work out the csa of a 5 inch pipe (approx 46000mm2) and then that of a 2 inch pipe (approx 6800mm2) you will see the significant difference, your shed will fill with smoke, you can use 2" pipe but multiple ones
46000/6800= 6.7 so 7x2" pipes is equivalent to 1x5" pipe

 

[KemppiFrog]

100mm (4") is about the practical min. 125mm (5") is considered the acceptable min around here, but I have used 100mm on several bottle based stoves with good results.