- Thread starter nickk
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Respect The Sound System
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This is another useful resource
www.breathefreely.org.uk
Welcome to the Breathe Freely Welding Fume Control Selector Tool
www.breathefreely.org.uk
I recently fitted an extraction system in my workshop (54m2), It is primarily intended to exhaust a laser cutter but can also be used as an extractor for welding. Fan is a centrifugal 1200m3 per hour with 150mm ducting, a 1m long attenuator is also fitted near the outlet in the eaves.
I could have gotten away with 125mm or maybe even 100mm bore ducting but wanted to keep duct velocity down to keep noise levels low (neighbours!) Fan is floor mounted under a bench on rubber mounts with two filter boxes on the inlet side. A heavy mdf box with lead flashing tacked on the outside covers the fan& filters to hold more noise in. I have put a decibel meter on it, (background decibel level is 40 db) & at full speed it registers 58db standing next to it, 52 db at other side of workshop. Standing 6ft from the exhaust outside its 52db. The neighbours cant hear it from their gardens at all.
It is shifting enough air to pull the door shut if you let it close more than 100mm. This is something you have to account for, you have to have enough air intake as well.
Im happy with it!
I could have gotten away with 125mm or maybe even 100mm bore ducting but wanted to keep duct velocity down to keep noise levels low (neighbours!) Fan is floor mounted under a bench on rubber mounts with two filter boxes on the inlet side. A heavy mdf box with lead flashing tacked on the outside covers the fan& filters to hold more noise in. I have put a decibel meter on it, (background decibel level is 40 db) & at full speed it registers 58db standing next to it, 52 db at other side of workshop. Standing 6ft from the exhaust outside its 52db. The neighbours cant hear it from their gardens at all.
It is shifting enough air to pull the door shut if you let it close more than 100mm. This is something you have to account for, you have to have enough air intake as well.
Im happy with it!
