Central air intake vent...?

My grow room has an intake vent and I'm wondering if I'd be able to PULL air FROM it. I mean, I know that I can, but will it ruin/degrade the central AC/Heating for the rest of the house in any way?

I ask because this is an intake vent, and I'd be forcing air the opposite way it was designed for. I just want to know the impact this would cause, if any.

Thanks in advance.

It seems these vents are actually called "return vents", and I was able to find the answer I was looking for:

"Every home and building that uses forced hot air for heating purposes will have return vents. The return vent, or register, is also known as an air return vent, and a cold air return vent. It accomplishes just what the various names imply, return colder air, via registers and ductwork, to the furnace so that it will run as designed."

So it sounds like doing what I wanted to do would be bad, very bad.

LV, you are correct, it's a bad idea and don't do it. With that said and better understanding of how the system works, that return is going to take the air from your grow room, send it back to the furnace where it will be mixed with air from the other room and sent back out. If you have an odor issue in the grow room you will soon have an odor issue in every room that this unit services. Have a plan and good luck with it.