Reducir al minimo ruido del indoor

If you don't have a budget problem, the Marshydro extractors work really well and are quite silent, plus they filter the smell spectacularly well.

I have an Ac infinity extractor fan and that runs at about 30db when running at maximum. Even quieter when it's settings are lower.

Hi Buddy, I would not use computer fans they arnt very powerful I have like 8 in my pc but none in my grow room. you can buy an extraction silencer. but another option is sound prrofing that room you can use old egg cartons if you wanna make it yourself or you can purchase sound proofing tiles from amazon or ebay. its something im looking into aswell as i have 2 10 inch extractors which are very loud even when run on the lowest setting. best of luck buddy keep up the great work :)

This could work. Personally, I would check that the Noctua fits the size of your duct and/or filter. You might need 2. I recommend you look for a better brand extractor with the parameters you need. Best regards.