Using this Erlab Captair Flex S321 filter housing is easy. First, make sure your ductless fume hood is turned off. Then, carefully place the housing in the appropriate spot of the fume hood. Remember, you'll need to install your own filters. When it comes to maintenance, regularly check the housing for any signs of damage. If you notice any cracks or issues, it's best to replace the housing. Also, keep the housing clean to ensure it works well. As for storage, keep it in a dry and cool place. When handling the box, be gentle as it may already have some wear and tear from previous storage.