How long have they been on 12/12 now mate ?
What size are your fans and do you have a fan speed controller you can set temp on and let it do jobby auto ?I’m just conscious of the fan being quite noisy and not trying to be bait with neighbours etc..
The fan set above 3 is considerably louder I can’t say you can hear it outside of the window but definitely you can notice the hum from the fans and dehumidifier