I am inside a bedroom, inside a 4x4 tent. The first time did a mix of Neem, Clove oil, & Peppermint Bonners soap spray. I felt like I needed it because I had Fox Farms soil that seems to be be known for carrying fungus gnats sometimes. So between a couple sprays of that stuff, the teas I used to feed and spray, and the yellow sticky cards, they did not get bad. In reality I think i killed them by watering less and using a thick layer of compost on the top, which after watering, created an armor shell. The second time I decided to order soil from BAS. That stuff has never had any issues with gnats or anything else, there are a lot of beneficial insects cruising in this soil, it's very active. I gave up the IPM because I was growing from seed and not bringing anything in from the outside. I have not seen the need for it, do you think I should always do it just to be safe?
As for the tent, it has an oversized
AC Infinity 6" exhaust with carbon filter hanging inside the tent, exhausting outside the room into my house (lame but there's no other good option). The tent runs 68-85 right now, it's winter in San Diego, the house is not AC'd. The lights on FULL blast will add 10-12 degrees. They always run hotter than I would like but I can't do AC because AMPs and old house wiring. RH is steady and controllable, I can add or remove it if I have to. Right now it's 65%RH and I am not adding any, so I am fine with that.
I just chopped a bunch of leaves and sprayed them with a fermented peach extract & water mix, dimmed the lights]