scoobiedoo
Active Member
I am creating a grow room for the first time in an unusual environment and would like some help concerning ventilation. Its a legal medical setup under Vermonts relatively new marijuana registry if I keep 7 or < plants which I intend to do.
Firstly, I heat with wood and cool the house by opening windows at night, using shades, etc. I dont intend to grow, unless just starting seeds, in July & August when combined heat and humidity can be uncontrollable. I have a de-humidifier, a humidifier, (2) 2x4 6 bulb T5HO fixtures that put out relatively little heat. I dont want to spend a lot more $ on this setup and would prefer to have ventilation be manually and passively controlled if that is practical.
I am going to use a 9 x 11 bedroom and completely cover the windows to discourage advertising what this is. The room ordinarily stays cool in winter just by keeping the door closed even if I have one of the fluorescent fixtures going to start seedlings. But until I got legal the seedlings would go outside in late May before it really heats up here and the young plants did not seem to mind either the very dry conditions in February/March when a fire is going all the time, or the more humid conditions of April and May when it can be raining nearly constantly and fires are less intense . But now I want to start and finish plants in this room and assume from my readings that I will need an air intake and exhaust to provide a healthy environment for adult flowering plants.
For intake I was thinking of running a 2 PVC into the basement and using the cool (moist) air from there. For exhaust I thought about the dryer type hose going through the ceiling leading to a gable end vent in the attic. But in Vermont, where temps can stay below 32 F for literally months, I wondered if the hose in the attic would just fill with ice and potentially ruin ceilings along with failing to ventilate. I also wondered if a manual open/close gizmo exists for the vent hose as extra heat might be more or less of a problem at different times.
I love growing pot and now I have an opportunity to do it legally and will spend more $ on this project if I have to. So please tell me if this passive approach is sensible and practical in my application. Bear in mind Im probably not going to have more than 4 mature plants in this good sized room and I do want to get the most from them. If replacing the ceiling light with a bathroom fan is the ticket fine. But elaborate and expensive climate control systems would probably not be practical for me as this is not commercial and I am not wealthy.
Many thanks for any suggestions.

Firstly, I heat with wood and cool the house by opening windows at night, using shades, etc. I dont intend to grow, unless just starting seeds, in July & August when combined heat and humidity can be uncontrollable. I have a de-humidifier, a humidifier, (2) 2x4 6 bulb T5HO fixtures that put out relatively little heat. I dont want to spend a lot more $ on this setup and would prefer to have ventilation be manually and passively controlled if that is practical.
I am going to use a 9 x 11 bedroom and completely cover the windows to discourage advertising what this is. The room ordinarily stays cool in winter just by keeping the door closed even if I have one of the fluorescent fixtures going to start seedlings. But until I got legal the seedlings would go outside in late May before it really heats up here and the young plants did not seem to mind either the very dry conditions in February/March when a fire is going all the time, or the more humid conditions of April and May when it can be raining nearly constantly and fires are less intense . But now I want to start and finish plants in this room and assume from my readings that I will need an air intake and exhaust to provide a healthy environment for adult flowering plants.
For intake I was thinking of running a 2 PVC into the basement and using the cool (moist) air from there. For exhaust I thought about the dryer type hose going through the ceiling leading to a gable end vent in the attic. But in Vermont, where temps can stay below 32 F for literally months, I wondered if the hose in the attic would just fill with ice and potentially ruin ceilings along with failing to ventilate. I also wondered if a manual open/close gizmo exists for the vent hose as extra heat might be more or less of a problem at different times.
I love growing pot and now I have an opportunity to do it legally and will spend more $ on this project if I have to. So please tell me if this passive approach is sensible and practical in my application. Bear in mind Im probably not going to have more than 4 mature plants in this good sized room and I do want to get the most from them. If replacing the ceiling light with a bathroom fan is the ticket fine. But elaborate and expensive climate control systems would probably not be practical for me as this is not commercial and I am not wealthy.
Many thanks for any suggestions.
