Good day! Here goes the first post!
I have a 4x8x9 foot grow area in a 8x8x9 room. It has two 8"x8" square passive intakes, and a 402cfm 6" AC Infinity inline fan for exhaust.
The exhaust ducting is 6" rigid ducting until the last 4' where it goes out of my house through the existing 4" rigid ducting that was there for the old laundry room.
When my door is closed and the fan has to pull air through the two 8"x8" passive intakes and push it out through the 6" to 4"
reduced exhaust, my room gets about 1 to 2 degrees too hot. If I open the door so the fan can pull air in through the door, the temp drops to the ideal temp range.
Based on the door being open fixing the problem, it seems like I have an intake size/restriction problem more than an exhaust size problem, however I can't cut any more intakes or enlarge the ones I have, but obviously do need to move more air through the room.
I want to enlarge the exhaust port to use 6" all the way out and remove the reducer, which I hope would allow the fan to pull harder, but am concerned this won't help the fan pull more air when the door is closed.
If I increase my exhaust port from 4" to 6" can I expect my fan to pull more air through the existing intakes without enlarging them? Can I expect more air flow? I worry that enlarging the exhaust will simply lower the speed of the air coming out of the exhaust but will have no net effect on air flow through the room.
I know I could just try it, but enlarging an existing hole is a pain, and will need me to cut vinyl siding as well, so getting it right is a one shot deal so I want to make sure it will be worth it.
Any HVAC people out there that can help with the calculations on this?
Thanks!
I have a 4x8x9 foot grow area in a 8x8x9 room. It has two 8"x8" square passive intakes, and a 402cfm 6" AC Infinity inline fan for exhaust.
The exhaust ducting is 6" rigid ducting until the last 4' where it goes out of my house through the existing 4" rigid ducting that was there for the old laundry room.
When my door is closed and the fan has to pull air through the two 8"x8" passive intakes and push it out through the 6" to 4"
reduced exhaust, my room gets about 1 to 2 degrees too hot. If I open the door so the fan can pull air in through the door, the temp drops to the ideal temp range.
Based on the door being open fixing the problem, it seems like I have an intake size/restriction problem more than an exhaust size problem, however I can't cut any more intakes or enlarge the ones I have, but obviously do need to move more air through the room.
I want to enlarge the exhaust port to use 6" all the way out and remove the reducer, which I hope would allow the fan to pull harder, but am concerned this won't help the fan pull more air when the door is closed.
If I increase my exhaust port from 4" to 6" can I expect my fan to pull more air through the existing intakes without enlarging them? Can I expect more air flow? I worry that enlarging the exhaust will simply lower the speed of the air coming out of the exhaust but will have no net effect on air flow through the room.
I know I could just try it, but enlarging an existing hole is a pain, and will need me to cut vinyl siding as well, so getting it right is a one shot deal so I want to make sure it will be worth it.
Any HVAC people out there that can help with the calculations on this?
Thanks!