Garage Exhaust Extraction
Discussion
After I've spent any time tinkering with one of my cars, my missus claims that I stink of exhaust smoke, and I do. In the summer, it's ok, but in the winter, when the garage doors are closed, running an engine for any length of time is a smelly activity.
I was planning to rig up some flexi ducting that I can sleeve over a car exhaust, with in-line fans extracting to the outside, to remove most of the fumes, but wondered if anybody uses any extraction and if so, what.
This is a domestic application, not commercial.
I was planning to rig up some flexi ducting that I can sleeve over a car exhaust, with in-line fans extracting to the outside, to remove most of the fumes, but wondered if anybody uses any extraction and if so, what.
This is a domestic application, not commercial.
Edited by Doofus on Monday 21st December 12:10
http://www.sitebox.ltd.uk/clarke-cam250-portable-v...
More expensive versions are available.
A bathroom extractor won't move anywhere near enough air.
More expensive versions are available.
A bathroom extractor won't move anywhere near enough air.
And I worry that the Clarke option may draw too much (and I really want something mounted high on the wall, out of the way) . I want to have a fairly well sealed system, after all.
I can get an extractor drawing anything from 184 m3/h up to 1375 m3/h, but I really need the right one. I also don't know what temperature the fas wil be at after it's gone thgough 2.5m of ali ducting to reach the fan.
I can get an extractor drawing anything from 184 m3/h up to 1375 m3/h, but I really need the right one. I also don't know what temperature the fas wil be at after it's gone thgough 2.5m of ali ducting to reach the fan.
http://www.eng-tips.com/viewthread.cfm?qid=104735
This guestimates 240cfm at 1/3rd throttle for a 3L engine.
Based on that, the 1,300cfm fan you've linked to for £100 seems a bit overkill.
This guestimates 240cfm at 1/3rd throttle for a 3L engine.
Based on that, the 1,300cfm fan you've linked to for £100 seems a bit overkill.
ikarl said:
silly boy question - why do you need a fan?
if the flexi pipe is airtight to the tip of the exhaust (i.e. the same size) just routeing it outside will be enough, no?
Sorry, I posted my comment below yours before I'd seen your post. I reckon a Sealey EFS07 (can't post a link, because Android) matedto some 60mm ali hose will do the job.if the flexi pipe is airtight to the tip of the exhaust (i.e. the same size) just routeing it outside will be enough, no?
hman said:
consider carefully how you will route the extract - and where it will emit the gasses.
Your neighbours will be a little annoyed if all of a sudden there is effectively a car exhaust pointed at their house and they can smell and hear your car...
I have passive air vents above the doors, so if I duct through one of those, the fumes will disperse into the air, just as they would if the garage doors were open.Your neighbours will be a little annoyed if all of a sudden there is effectively a car exhaust pointed at their house and they can smell and hear your car...
Jakg said:
http://www.eng-tips.com/viewthread.cfm?qid=104735
This guestimates 240cfm at 1/3rd throttle for a 3L engine.
Based on that, the 1,300cfm fan you've linked to for £100 seems a bit overkill.
So if I assume, say 300cfm, that's about 500m3/h. I can get a 430 for £60, or a 700 for £70, so that's all good This guestimates 240cfm at 1/3rd throttle for a 3L engine.
Based on that, the 1,300cfm fan you've linked to for £100 seems a bit overkill.
I can't find the airflow specs, but for a job I've been working on recently we have a 4kW fan to run extraction at 20 pick ups simultaneously. Sized on a mix of 3 and 4 litre engines at idle.
Edit to add:
Ah found it, we have specified a fan capable of up to 6500 m3/hr for 20 points, so 325m3/hr per vehicle. The fan may be capable of more, but it's a safe number.
Edit to add:
Ah found it, we have specified a fan capable of up to 6500 m3/hr for 20 points, so 325m3/hr per vehicle. The fan may be capable of more, but it's a safe number.
Edited by ndg on Monday 21st December 15:49
ndg said:
we have specified a fan capable of up to 6500 m3/hr for 20 points, so 325m3/hr per vehicle. The fan may be capable of more, but it's a safe number.
Great, thaanks. So I can easily get a fan capable of moving the air. You fan is obviously industrial, but did you take gas temperature into account?It is industrial yes, 3ph with inverter control to maintain a constant depression with different usage. You obviously don't need to worry about that as you will only have one pick up, which will be on or off.
Gas temperature isn't too much of a concern, plenty of fresh air gets pulled in around the exhaust pick up which lowers the temperature. Our system also has anywhere between 30 and 150m of underground pipe in which to cool the gases! This does mean we have had to install condensate collection pits to avoid the pipes filling with water over time. Again, not a real problem in your application.
I should have mentioned that we've sized on diesel engines as the pump pretty much the same amount of air loaded or unloaded. Petrol engines push less air out at idle as they throttle the intake.
Gas temperature isn't too much of a concern, plenty of fresh air gets pulled in around the exhaust pick up which lowers the temperature. Our system also has anywhere between 30 and 150m of underground pipe in which to cool the gases! This does mean we have had to install condensate collection pits to avoid the pipes filling with water over time. Again, not a real problem in your application.
I should have mentioned that we've sized on diesel engines as the pump pretty much the same amount of air loaded or unloaded. Petrol engines push less air out at idle as they throttle the intake.
Gassing Station | Homes, Gardens and DIY | Top of Page | What's New | My Stuff