Do you have to have CO2 if you are cycling the air in the room? I have a cold grow area that I don't use in the winter as it is too cold here.
miniack Reviewed by miniack on . winter ventalation The room I am building is in an out building. The building doesn't have heat on all the time, although the room will. How can I control the odor without sucking all the heat out of the room. It gets damn cold here in the winter. Rating: 5