Does a HEPA filter go on the outside or the inside of a grow tent?

Does a HEPA filter go on the outside or the inside of a grow tent? Am I trying to pull air through the filter by placing it on the outside of the tent so that the outside air is first sucked through the filter and then through the intake fan? Or do I want to push the air past the filter by putting it on the inside of the tent and sucking the outside air through the intake fan first and then pushing the air past the filter and then into the tent? I have read that pulling air is more efficient than pushing, so I'm thinking more towards putting the filter outside the tent and pulling the air through... Is this right? Does anyone have any ideas??

p.s. im using a growlab gl120 tent, 4'x4'6'7", 5" vortex inline, 4" HEPA filter with 5" to 4" duct reducer to connect them

I have never heard of anyone using a hepa filter to filter incoming air. Isn't that going to severely retard your airflow? If you want to prevent hair and insects from getting into a tent through the intake, stretch a pantyhose like material over the duct opening. Your vortex fan should be hooked up to a carbon scrub filter that is hanging up in the tent and then go directly to exhaust. The fan should not have to pull in fresh air through a hepa filter AND a carbon filter. There is no reason to filter incoming air, unless you have a bunch of debris, ash, or other harmful substances in your air. No one wants dog hairs on their buds, but a hepa filter?

Thank you for the help, but I actually have a plan for all that.. I'm making up for the less efficient intake airflow by adding a fan to the intake port, because if I understand it correctly in a small tent like mine, you usually don't even need a fan in the intake port. So I feel like I'm compensating for the lost airflow by putting an inline fan there. So I'll have a fan that is 400 cfm's more powerful in the outgoing exhaust port to maintain the room's negative pressure.. plus I guess HEPA filters need a lot of airflow so having a fan there is actually necessary.. and as far as the filtering of bugs and dog hair and all that, it may be a bit of overkill, but using the HEPA is more of a preventative measure than anything else.. I understand that both mold and spidermites, among many other harmful elements can enter a grow tent through the intake port, and instead of dealing with these problems after they occur I am trying to prevent them from even happening in the first place, and HEPA filters keep 90% of all the gross harmful stuff out. And above all, the cleaner the air in your tent, the healthier your plants will be, so I guess that's also why I feel like it's worth it to use one. My only problem is I can't figure out how to set it up, on the inside or outside of my tent (see original thread post question)