Any workshop ventilation/heating experts?

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hillbillyracer

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posted on 6/2/10 at 11:58 AM

Any workshop ventilation/heating experts?

I'm luckier than most here having a large workshop to play in but have a slight issue with heating & ventilation.
I've got a barrel type wood burner for heating which works great, see my photo archive.
The workshop is 36'x20' & 11' to the eves, the problem with is the heat rises to the top & I tend to do all my work in the bottom 6' or so (I belive most people work in a similar fashion!). It can be below freezing outside, 18-20deg above in the top 3-4' & it takes ages to get to a decent temp, mabye 8+deg for working lower down near the floor.

What would be most effective to circulate the air? Would a simple ceiling fan be good (like I have above the heater to blow air over it) or some ducting to pull air from the peak of the roof & have an outlet in the opposite corner to the heater at floor level?
I was thinking of this kind of stuff, it's not as expensive as I thought:
http://cgi.ebay.co.uk/FLEXIBLE-DUCTING-DUCT-HOSE-FLEX-TUBE-PIPE-150mm-6-dia_W0QQitemZ380149232015QQcmdZViewItemQQptZUK_Home_Garden_Hearing_Cooling_Air ?hash=item5882a8f18f

And a fan such as this:
http://cgi.ebay.co.uk/IN-LINE-DUCT-EXTRACTOR-FAN-HYDROPONICS-150-mm-6_W0QQitemZ260477920887QQcmdZViewItemQQptZUK_Home_Garden_Hearing_Cooling_Air?hash= item3ca5b1a677
Although that says effective extraction along a 3meter duct, that sound pretty crap if it can only work effectively on a maximium of 3m of ducting/

I dont really want anything that makes a lot of noise, just something that quietly shifts the air about.
The reason for considering a duct is I could with a simple flap in the duct direct it outside to remove fumes.

[Edited on 6/2/10 by hillbillyracer]

t16turbotone

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posted on 6/2/10 at 12:42 PM

http://cgi.ebay.co.uk/Industrial-Ceiling-Fan-Kansas_W0QQitemZ260431267849QQcmdZViewItemQQptZUK_Home_Garden_Hearing_Cooling_Air?hash=item3ca2e9c809 />
Normally this type of thing connected to thermostat will push down the warm air

MikeR

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posted on 6/2/10 at 12:49 PM

Why not fit some hardboard at the rafter level to reduce the volume of the garage? Its what i've done in my single garage and i think its made a difference.

hillbillyracer

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posted on 6/2/10 at 01:16 PM

quote:
Originally posted by t16turbotone
http://cgi.ebay.co.uk/Industrial-Ceiling-Fan-Kansas_W0QQitemZ260431267849QQcmdZViewItemQQptZUK_Home_Garden_Hearing_Cooling_Air?hash=item3ca2e9c809 />
Normally this type of thing connected to thermostat will push down the warm air

That's the kind of thing as a quick fix option I was thinking of, What I'm wondering is how effective ducting would be for the extra hassle?

I cant reduce the height as I work on all sorts of stuff, currently my brother's Hi-lux is on the 2 post lift getting a good sort out for the MOT. I have lined it out with chipboard & rockwool which made a big difference, once you get it heated it doesnt take much keeping there.
The workshop is on the faminly farm & we use it to maintain the tractors & machinery too.
It all gets in the way of the serious business of mucking about with cars!

The height problem also means I'm limited as to where I can put a ceiling fan as it would stick down a bit, it could'nt go in the middle where it's most effective because we'll drive something big in & clobber it!

MkIndy7

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posted on 6/2/10 at 02:36 PM

The De-stratfication fans are good for pushing the hot air back down to the floor, large garages and wharehouses etc have them.

Could you not have something very easily removable to lower the cieling in areas, Like a Roller Blind type of thing.. obviousley it would have to be rather large.

I'm sure a picture of the space would help people in making suggestions.

hillbillyracer

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posted on 6/2/10 at 02:56 PM

I'll see about getting a pic up, not got any in the computer of it.
It's a Steel portal frame building with a large roller shutter door in the end, insulated with 6" of rockwool behind chipboard on one side, the closed end & the roof. The remaining side is made up by the side of another building made from concrete blocks.

All I'm really wanting advice on is whether it's worth the hassle & expense of a duct taking air from the area around the peak & expelling it at or just above floor level against the simple solution of a ceiling fan.

Wadders

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posted on 6/2/10 at 04:22 PM

My pal has a very similar set up in a similar sized building except his is probably 16ft to the apex. we put 2 ceiling fans in like the ones you get in conservatories set to push air not pull.
They made a big difference.

Al.

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posted on 6/2/10 at 05:15 PM

Where i work we have a fan about 3ft across in the roof and it works very good except its a body shop with a lot of dust and when the fan is on it blows the dust about
[ body filler ]

Canada EH!

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posted on 6/2/10 at 05:41 PM

My shop is 20' x 30' heated by hot water circulated through the concrete floor, nice and warm at floor level. I put two ceiling fans on the ceiling to help circulate the air, they are reversable, blow down in winter, suck up in summer.
Works well. I noticed after the shop was built that the temperature would rise when I was working, I was circulating the air while walking about, so I put the fans in.

hillbillyracer

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posted on 6/2/10 at 06:15 PM

Heated workshop floor?!!! Fantastic idea & to be fair I did think of it at the time when I laid mine but dismissed it as an expensive extravagance.

I called in on a bloke who deals in all manner of junk & tat (I've bought loads off him

) to see if I could get a ceiling fan on the cheap. He had non but had a duct fan that I got for a couple of quid to have a play about with. I wired a plug on it & set it off to see how powerfull it was, it got up to a fair old rate & went "pop"! I just unplugged it & went back in the house, only thought now that it may have been 110v, OOPS!

Looking at the posts since I left earlier ceiling fans may be the thing, cheers.

[Edited on 6/2/10 by hillbillyracer]

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posted on 6/2/10 at 08:06 PM

I have a large party room at the end of my sehed. It has a wood stove and a simple four blade ceiling fan works wonders.

jacko

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posted on 8/2/10 at 07:50 PM

How about a water tank on or in the fire with 2 pipes coming out of it to a radiator and a central heater pump [ like a back boiler in a house

disclaimer if it blows up don't blame me i don't know if it would work

Jacko

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