Positioning of vents and extractor fan in shed?

HappyHippyDad · Jan 2, 2022

I have just had a log cabin installed, it is being used as a gym.

I have installed an extractor fan to help with the flow of air. The extractor fan is located high up (see picture) and I am wondering where to position the vents to allow flow of air into the room (and then out through the extractor fan).

It makes sense to me to have them on the opposite wall to the fan and low down (see pic). I thought I would ask you guys if this seems right? If not, where would you position them?

My reasoning is, this will allow the best flow of air through the cabin.

I was also thinking of having another 2 (additional) vents on the same side as the extractor fan, again low down, as I thought this might create an even better flow of air (more encompassing of the entire room).

lastly, I also thought of having (additional) vents high up (somewhere) to allow flow of air even when the extractor fan is not on, thus allowing passive flow, but I am not sure where or if this is needed? I thought it would be best to have them the opposite side to the fan, but.... I would then definitely need some vents on the same side of the fan, to allow the correct direction of the passive flow.

Hoping for a few thoughts on these positions? Cheers

[ElectriciansForums.net] Positioning of vents and extractor fan in shed?

ImpededLoop · Jan 2, 2022

I'd just put 2 low down on the opposite wall. If you put them on the same wall, the airflow will short circuit and will result in you not pulling air across the cabin.

Pretty Mouth · Jan 2, 2022

I'm not a ventilation expert, but have researched similar for bathroom extractors. It seems the ideal is to have the extractor at the opposite end of the room to the in-vents, doors and windows. As @ImpededLoop says, any vents closer to the extractor will mean less air exchange overall.

UNG · Jan 2, 2022

HappyHippyDad said:
It makes sense to me to have them on the opposite wall to the fan and low down (see pic). I thought I would ask you guys if this seems right? If not, where would you position them?

This would be the obvious solution to give the best through flow of air

HappyHippyDad said:
I was also thinking of having another 2 (additional) vents on the same side as the extractor fan, again low down, as I thought this might create an even better flow of air (more encompassing of the entire room).

This would severely reduce the air flow of across the cabin

HappyHippyDad said:
lastly, I also thought of having (additional) vents high up (somewhere) to allow flow of air even when the extractor fan is not on, thus allowing passive flow, but I am not sure where or if this is needed? I thought it would be best to have them the opposite side to the fan, but.... I would then definitely need some vents on the same side of the fan, to allow the correct direction of the passive flow.

While trying to cover all bases you are likely to end up with a very compromised system of ventilation unless you can close off some of the vents when they are not needed

HappyHippyDad said:
Hoping for a few thoughts on these positions? Cheers

Could you run some ducts at high level and fit the fan with a spigot box to allow air to be drawn out at a number of points across the apex of the cabin then you could use a number of vents at low level around the cabin to let fresh air in

mart spark · Jan 2, 2022

When it comes to venting heat, for best performance you need a bigger outlet than inlet. It depends on how many cubic litres per minute the extractor fan can remove as to the optimal size of the inlet.

HappyHippyDad · Jan 2, 2022

Really helpful replies, thanks all. I thought I was over complicating it a bit. 2 vents, low down, opposite wall, simple!

I've now fitted 2 infrared heaters, 2 twin batten lights, 50" TV for following workouts, extractor fan and a 56" ceiling fan is on the way! It's cost a bloody fortune, but I love walking into the area, which makes me want to work out even more.

Mike Johnson · Jan 3, 2022

@HappyHippyDad also consider some kind of vapour control to vent sweat or at least control it at the workout machine, sweat eats through paint and eventually rusts your metal work, one very expensive bike with rusty nuts, changed to titanium eventually.

littlespark · Jan 3, 2022

Give it six months and his gym will be furnished with a sofa, massive tv and a beer fridge.

UNG · Jan 3, 2022

littlespark said:
Give it six months and his gym will be furnished with a sofa, massive tv and a beer fridge.

Still get a workout left arm one pint right arm the next pint and every few pints a jog to the toilet and back, that's my sort of work out

littlespark · Jan 3, 2022

Jog to the toilet?

What’s wrong with just opening the door and finding a bush?

UNG · Jan 3, 2022

littlespark said:
Jog to the toilet?

What’s wrong with just opening the door and finding a bush?

I didn't say where the toilet might be

Mike Johnson · Jan 3, 2022

Commode by chance??????????????

Positioning of vents and extractor fan in shed?

HappyHippyDad

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ImpededLoop

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Pretty Mouth

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UNG

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mart spark

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HappyHippyDad

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Mike Johnson

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littlespark

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UNG

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littlespark

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UNG

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Mike Johnson

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