keeping a closet grow cool without vents

My closet was staying around 70 with the old lights I had. Since I have pumped up the lights by adding one of these (see pic) my heat and humidity has gone up.

Since this is in a closet and Im living in a rented house drilling vent holes can not happen, I have A duel window fan always running and the air circulation is good.

So far I have been just opening up the door during the light cycle to just vent the air a 3 - 4 times.

Is there any way to lower temps without a vent?

I only ask because every time I open the door my room and the whole upstairs begins to smell of skunk and lemons (as my roomates tell me) My roomates are all cool with me growing as the smoke out also. And they are in super secret stealth mode about the grow...

thanks in advance to all replies

one way or another you gonna have to seal the closet and bring air in and carbon filter it out....if it's a closet make a fake wall of plastic or something, that way you don't need to make holes in anything not yours, leave the closet door open, put a hole in the bottom for passive intake and get a cheap vent booster fan for the exaugst ($30 at rona) , now go visit the DIY HowTo section and make one of them cheap carbon filters, hook it to the fan and mount it in the top of the fake wall.
that should clear your heat and smell prob nice and cheaply

thanks.. I have a bunch of 1"x1" wood studs that I can use to make a frame. The closet is big enough to build a mini room inside. Damn, thanks for giving me the idea.

np, hope it works out for ya