Same question as this — but for bathroom ventilation fans now.

enter image description here

  • These are pictures of indoor grilles. It is the outdoor ones that you need to look at and they should be configured to auto-close and/or prevent pests. Animals do build nests in them and they should be setup to prevent that.
    – Nelson
    Jul 20 at 7:08

Yes…see my answer for kitchen exhaust fan.

Not the answer you're looking for? Browse other questions tagged or ask your own question.