Exhaust fan busted, what to do?

So I’m 11 weeks into growing my autos, and my exhaust fan has buckled and making some crazy loud noises. I had it plugged into a variac but the fan was pretty cheap tbh.
I’ve currently just got the tent with the door open hopefully just taking in passive air with 2 oscillating fans inside.

I was going to harvest one plant in about 4 days, I’ve been flushing for 3.
The other has a longer, maybe 3 weeks.
Should I buy a new fan pronto or just harvest what I can?
Will passive intake be fine for a couple of days? I can still use my loud exhaust fan during the days but the buzzing is to loud to hear at night.

Any input would be greatly appreciated

At night you have the lights off (I am assuming you have the lights on in the day and off at night). No need to vent although it might get a little smelly inside.

printer said:

At night you have the lights off (I am assuming you have the lights on in the day and off at night). No need to vent although it might get a little smelly inside.

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Thanks, I’m on a 18/4 schedule.

I missed that they were autos. How about turn the lights out while you are asleep?

Buy a new fan ASAP ... you'll need it anyways next time you grow. No exhaust is no bueno.

If you can still control temp, humidity and smell is not a problem, just prevent stale air by keeping the air moving with your other fans. No problem.

I keep a fan in reserve. So far the one I'm using now is 7 years old.