hi, i just got a new flow hood 2x4. i heard that a lot of places keep theirs on all the time. im a very small farm, relatively new(~3 years). not an advanced set up at all. i have a 'clean room' which is a bed room that has no mattress. my parents make me keep the carpet pad on the floor because they dont want any damage on the floor.so thats the porous surface i have in there. i tried to tell them we could get rubber floor mat or some other non porous mat to put down but they said no... other than that, i feel its kept pretty clean. my point is its not a professional clean room at all. back to keeping the flow hood on all the time. the rationale is that dust can settle on the filter if its turned off. but my parents dont want me to keep it on all the time(cost)(?). i was thinking of buying a cover for it. what do you guys think? do you think this set up is plausible to run a mushroom farm out of for now? would putting a cover on the flow hood still keep it running correctly for a while? i was getting contam a lot before with a flow hood we built so i bought this one. but after watching some of these episodes im also going to look into a few other things. i have a few questions about this as well... thank you.....