thanks for all of the help and guidance
I think on reflection i didn't know how complex immersion was and i think i am going to do air cooled with lots of acoustics to reduce the noise
If you want to use air cooling, then read reviews about different models. For example, if you want to use Bitmain Antminer T21, then these ASICs have certain shortcomings that are better to fix before mining. Good firmware has already appeared for the T series and it would be better to replace the factory thermal paste on the chips.