I live in Canada, Quebec.

The problem is that my warehouse is kinda isolated. It only has one window.
The warehouse has an exhaust of 14x14" which I believe is 700CFM (useless).

The only way I can install fans is on the roof and it is extremely expensive.

The US$17.000 is for the whole installation and equipment.

1 Exhaust fan of 20.000CFM
1 Fan filtered of 20.000CFM
custom made ducts
The roofer of what ever is call. The guy who open the hole on the roof and puts a base and make sure the roof can support the weight.
The ventilation guy to install the whole set up.

My warehouse is 17 feet high.

I was thinking to do a wooden box where it will have the square holes for each miner fan (exhaust). I will put that box just behind the rack and the fan of the miner will enter there.
Then all the miners will be exhausting the hot air inside that box.
That box, on the ceiling of the box, it will have the custom made ducts connected up to the roof of the warehouse and connected to the extractor .

So the hot air of miners go inside the box, the ducts connected to the ceiling of the box and extractor on the roof pulling the hot air outside.

Then we have another fan on the roof bringing air from outside to inside the warehouse, of course filtered.


That is the only best idea we had.