Semi sealed room question

[FromHolland]

I have a question about Co2 in a semi closed room.

I have heard that it's pretty hard to have a closed room as I don't want to take the risk with Co2 it needs to be a semi closed room.

is it possible to use a fan inside the room and let it suck and blow out the air in the same room? For an example I have a grow room, I place a fan in it and turn it on. Will this create a negative pressure so no bad odor etc will escape? Will it work or is this a plain stupid idea.

I need to know this because I want to keep the negative pressure in the room with the Co2.

 

[Mikell]

A fan will not create negative pressure. You still want a few oscillators on the walls though

Set up a recirculating carbon can/fan for the smell. Sealing a room off is easy, just takes a bit of caulking, foam and tape. Doors a bit tricky sometimes. If it closes well, it just takes a bottom plate and another strip of weather proofing.

If you still want negative pressure, cut in a small filtred out take and pay the price of increased CO2 use.