Ventilation 101 - Page 13 - Growroom Designs & Equipment - International Cannagraphic Magazine Forums

BongCalledYoda · 06-24-2009, 03:17 AM

Quick Question... Would the fact that when I turn my exhaust to a higher speed the temp goes up be due to too much passive intake? The fan should be moving way more air than I would need but I cant shut the door of my cab without a crazy heat build up... Glad I could find some fan gurus to hopefully get me on the right path. Thanks in advance.

06-24-2009, 07:21 AM

Is there air flow over the heat source ( lights )? If there is then increasing the flow should cool them. If not then increasing the flow would just suck the air further away from the lights , see my prev. diagram. Id suggest putting a fan inside the box or placing the intake and exhaust on opposite ends of the heat source to make sure the air flows around the light itself

BongCalledYoda · 06-24-2009, 10:21 PM

I have exhaust at the top right corner, right next to the light. Passive intake at the foot of the left side. Plus a little fan blowing from the floor onto the light. I should have plenty of air movement around the light... I just don't know what else to do and refuse to spend more money if it won't be fixed... Thanks for the input

06-24-2009, 11:25 PM

What I am saying is place your hand over the light and make sure there is air flow. If your intake temps aren't at least 6 degrees cooler then then the light its not going to do anything either.

BongCalledYoda · 06-25-2009, 05:48 AM

I understand that. The air is flowing around the light and the intake air is much cooler than the light, that is why I am confused.... Thanks again

Dank Sinatra · 06-25-2009, 09:37 AM

well than whats the temperature of a 1000 watt bulb?

BongCalledYoda · 06-25-2009, 08:55 PM

I have no idea.. I am using a 150 watt and the intake air is ac controlled 72

JohnnyToke · 06-25-2009, 11:06 PM

Quote:

Originally Posted by BongCalledYoda

Quick Question... Would the fact that when I turn my exhaust to a higher speed the temp goes up be due to too much passive intake? The fan should be moving way more air than I would need but I cant shut the door of my cab without a crazy heat build up... Glad I could find some fan gurus to hopefully get me on the right path. Thanks in advance.

what kind of exhaust fan do yo have (make, model)?

is it sealed tight to your cab where it only pulls air from within the cab when the doors are shut?

how big are your intakes?

once these are answered, I think we can help you out better.

BongCalledYoda · 06-26-2009, 02:50 AM

Thanks JonnyToke. Right now I am using a Stanley blower( if this is my weak link I have no problem changing that) It is sealed tight to the cab and only pulls air from inside when the door is closed. I have 4 2" passive intakes but 2 are taped shut since they didnt appear to be helping. With the door open the temp stays in the high 70's but if I shut the door it climbs to high 80's or even worse low 90's. I have no problem with changing the set up, just want to be sure my problem will be fixed after the change... I appreciate the input but my plants thank you more...

BongCalledYoda · 06-26-2009, 03:07 AM

Forgot to mention the exhaust is 5" with a 5" to 4" decrease. thanks again

06-24-2009, 03:17 AM	#121
BongCalledYoda Member Join Date: Jun 2009 Location: You know White Castle? No where near it. Posts: 126	Quick Question... Would the fact that when I turn my exhaust to a higher speed the temp goes up be due to too much passive intake? The fan should be moving way more air than I would need but I cant shut the door of my cab without a crazy heat build up... Glad I could find some fan gurus to hopefully get me on the right path. Thanks in advance. __________________ "...'cause all we need is some weed and a laid back beat, black lights if you stereotype, couple bean bag chairs and a lack of airs, a marathon of price is right."
	Quote

06-24-2009, 10:21 PM	#123
BongCalledYoda Member Join Date: Jun 2009 Location: You know White Castle? No where near it. Posts: 126	I have exhaust at the top right corner, right next to the light. Passive intake at the foot of the left side. Plus a little fan blowing from the floor onto the light. I should have plenty of air movement around the light... I just don't know what else to do and refuse to spend more money if it won't be fixed... Thanks for the input __________________ "...'cause all we need is some weed and a laid back beat, black lights if you stereotype, couple bean bag chairs and a lack of airs, a marathon of price is right."
	Quote

06-25-2009, 05:48 AM	#125
BongCalledYoda Member Join Date: Jun 2009 Location: You know White Castle? No where near it. Posts: 126	I understand that. The air is flowing around the light and the intake air is much cooler than the light, that is why I am confused.... Thanks again __________________ "...'cause all we need is some weed and a laid back beat, black lights if you stereotype, couple bean bag chairs and a lack of airs, a marathon of price is right."
	Quote

06-25-2009, 08:55 PM	#127
BongCalledYoda Member Join Date: Jun 2009 Location: You know White Castle? No where near it. Posts: 126	I have no idea.. I am using a 150 watt and the intake air is ac controlled 72 __________________ "...'cause all we need is some weed and a laid back beat, black lights if you stereotype, couple bean bag chairs and a lack of airs, a marathon of price is right."
	Quote

06-26-2009, 02:50 AM	#129
BongCalledYoda Member Join Date: Jun 2009 Location: You know White Castle? No where near it. Posts: 126	Thanks JonnyToke. Right now I am using a Stanley blower( if this is my weak link I have no problem changing that) It is sealed tight to the cab and only pulls air from inside when the door is closed. I have 4 2" passive intakes but 2 are taped shut since they didnt appear to be helping. With the door open the temp stays in the high 70's but if I shut the door it climbs to high 80's or even worse low 90's. I have no problem with changing the set up, just want to be sure my problem will be fixed after the change... I appreciate the input but my plants thank you more... __________________ "...'cause all we need is some weed and a laid back beat, black lights if you stereotype, couple bean bag chairs and a lack of airs, a marathon of price is right."
	Quote

06-24-2009, 07:21 AM	#122
lysol Guest Posts: n/a	Is there air flow over the heat source ( lights )? If there is then increasing the flow should cool them. If not then increasing the flow would just suck the air further away from the lights , see my prev. diagram. Id suggest putting a fan inside the box or placing the intake and exhaust on opposite ends of the heat source to make sure the air flows around the light itself
	Quote

06-24-2009, 11:25 PM	#124
lysol Guest Posts: n/a	What I am saying is place your hand over the light and make sure there is air flow. If your intake temps aren't at least 6 degrees cooler then then the light its not going to do anything either.
	Quote

06-25-2009, 09:37 AM	#126
Dank Sinatra Member Join Date: Jan 2009 Posts: 205	well than whats the temperature of a 1000 watt bulb?
	Quote

06-26-2009, 03:07 AM	#130
BongCalledYoda Member Join Date: Jun 2009 Location: You know White Castle? No where near it. Posts: 126	Forgot to mention the exhaust is 5" with a 5" to 4" decrease. thanks again __________________ "...'cause all we need is some weed and a laid back beat, black lights if you stereotype, couple bean bag chairs and a lack of airs, a marathon of price is right."
	Quote