j420man
Member
i have had it with powdery mildew i cant take it anymore and air exchange can kiss my ass 
i now use a 70 pint dehumidifier and co2 i use 1000 watt cool tube with 400 cfm hydrofarm fan and i have found you run less risk of every thing if you dont exchange the air co2 is cheaper then a good intake and exaust fan the plant make oxygen so why bother i run fresh air into the room maybe once a week and i use a 6" hepa filter that i retro fitted for that bottom line i am a commercial med grower in colorado legal of course and i cant have that stuff happening so take my word for it get fan cooled lights good air movement in the room i keep humidity at 48% in veg and 34% in late bloom temps are always 85 degrees if you use co2 the need to exchange air is no longer needed and actually lowers humidity till co2 tanks fill room again so its a waist of time its spring and there are tons of spores everywhere change youre clothes and say goodbye to air exchange its a variable that you dont need i have 3 1000 watt grow rooms with ebb and flow and its just more predictable i am a hydro grower i like total control so the air is no exception just my opinion and ther are grower who dont need any of this stuff i use but i cant allow variables if youre legall its better to grow outside anyway the two most expensive things about growing are light and atmosphere and those are free outside good luck all
i now use a 70 pint dehumidifier and co2 i use 1000 watt cool tube with 400 cfm hydrofarm fan and i have found you run less risk of every thing if you dont exchange the air co2 is cheaper then a good intake and exaust fan the plant make oxygen so why bother i run fresh air into the room maybe once a week and i use a 6" hepa filter that i retro fitted for that bottom line i am a commercial med grower in colorado legal of course and i cant have that stuff happening so take my word for it get fan cooled lights good air movement in the room i keep humidity at 48% in veg and 34% in late bloom temps are always 85 degrees if you use co2 the need to exchange air is no longer needed and actually lowers humidity till co2 tanks fill room again so its a waist of time its spring and there are tons of spores everywhere change youre clothes and say goodbye to air exchange its a variable that you dont need i have 3 1000 watt grow rooms with ebb and flow and its just more predictable i am a hydro grower i like total control so the air is no exception just my opinion and ther are grower who dont need any of this stuff i use but i cant allow variables if youre legall its better to grow outside anyway the two most expensive things about growing are light and atmosphere and those are free outside good luck all