My exhaust

Ive posted a few other threads on the same issue i am having but i wasnt listing the information right. I have a 170CFM inline fan that is connected to a cooltube with 600W HPS bulb. The other side of the cooltube is open. On bottom of the box is 2 intake holes sucking air from outside the closet. the inline fan is sucking the air through the intake holes through the tube, out of the box and then out of the closet. The open end of the tube is opposite side of the intake holes. I cant get the temp to keep cool enough it just keeps rising... should i have the 170CFM fan sucking the air out of the box itself and possibly get something like this:
High Tech Garden Supply
to get the air out of the cooltube and enclose the cooltube with air from outside the closet as well?

Would getting more fans to oscilate the air inside the box be of any help?

you definitely need a circulating fan in the box, just a small oscillating fan.
iirc, you have about a 30 cubic foot box right? the 170cfm should do the job of exhausting that size box but maybe the 600w is just too hot for it.
maybe get the 250cfm 6" inline for only $5 more than the 4", itll move 8 times the box volume per minute so all the air replaced in 7.5 seconds.
atm the light is being fed air from inside the box right? a duct to draw fresh cool air through the light from outside the box should make a difference, providing the exhaust for the box is adequate which it should be if you get the 250cfm 6" fan.
check the temps at the inlet(outside box), ambient temps inside the box and at the exit of your exhausts(both light and box exhausts, outside box).
what size are the intake holes?

A 600W HID is going to eat 4 of those fans for lunch. You should post some info about the room size.

Ok basically yes its a 170CFM inline fan which is ducted to one side of the cooltube and the other side of the tube is open drawing air from the box through it. the intake holes are 2 4" holes towards the bottom of the box. the box itself is 4' H x 4' W x 1'9" Deep.

Ok basically yes its a 170CFM inline fan which is ducted to one side of the cooltube and the other side of the tube is open drawing air from the box through it. the intake holes are 2 4" holes towards the bottom of the box. the box itself is 4' H x 4' W x 1'9" Deep.

The temps from the exhaust hit about 85 and very slowly climbs higher. The temps inside the box with the thermometer probe above the light it gets around 96... (thats with the probe very close to the light fixture though) ive put the thermometer on the wall inside the box almost out of the light with the probe under the light and the temps are about the same and climb slowly.

Also while the lights are on and the fan is running, very cool air is being sucekd in through the intake...i mean its nice and chill air... it seems as though it isnt going all throughout the box because the middle of the box under the light as well as the side opposite the intakes is much warmer and i feel no cool air at all...

I am all out of advice today on ventilation check out this one from this morning.

https://www.rollitup.org/grow-room-design-setup/25310-ventilation-questions.html

and Major's posts on taking the temp

https://www.rollitup.org/indoor-growing/25204-temp-correct.html

4 X 4 X 2 IMO is going to need some mad ventilation. You are headed down a very tough road. i will let a few others respond. For the record I downsized to a 400w

damnit i knew i shouldnt have gotten the 600. My original plan was to get 2 250's and run them side by side but the guy at the hydro store said the 600 would be the same but better i guess? should the box be completely light tight because its not 100%. there are small screw holes and small places where the wood was screwed together i can see light... would this help it at all or should i even bother closing it completely?

Ok so i went and got a few fans today to help with the air ciculation inside and its helping tremendously. I have a honeywell circulation fan on the side with the intakes to help push more air from there in the box. it is angled at about a 45 degree angle toward the light itself. I also have 2 smaller fans to help with the circulation...i put the thermometer near the open side of the light to see how cool the air going through it was and its staying around 90 degrees. the probe is towards the bottom of the box hanging above the ground in the middle of the box almost...that is also around 93 constantly...i know this is too high but its way better than what it was, it used to keep climbing and climbing. So now that i have a constant temperature should i maybe add more fans inside or am i screwed and should i just downgrade to a 400 HPS or possibly get the 270 CFM 6" inline fan and replace the 170 i currently have in there?

Man im in the same boat as you with the heat problems....I have a 400w with a cool tube, and a 270cfm blower hooked up to it.(it draws cool air from outside, over the light and out the other side)..Its in a 2X4 hydrohut with a small rotating fan, and 2 small fans in top blowing down...It gets so hot , around 90f that i have to leave it unzipped, and another fan blowing into it and the temp is a around 86-88rf...I ended up ordering another blower Friday to exhaust the hot air out, (a 465cfm blower, "that should do it")
Heat is a killer man, so try to get that vented out of the closet...

Yeah well right now i only have a 170 cfm fan that is suckin the air out of the box through the tube outside of the room and i have 2 intakes that are also sucking air from outside of the room. yeah one of my fans is blowing air right at the light to try and keep the heat towards the top but it isnt enough. my 2 smaller fans arent enough either. yeah i think i need another fan to exhaust the box air itself and enclose the cooltube itself... i would have done this already but the fans are pretty pricey and i dont watn to have to get a 130 dollar fan again unless i have to which looks like the case.... but would a cheaper fan from wal mart or somethign suffice for either the light exhaust or the box exhaust...thats what im trying to figure out...?

My 265cfm blower was 74delivered, and the 465 is $99 delivered off ebay..Both are hydrofarm brand blowers..Trust me i had to scrape everything together to get them but i had no other choice. (its was either a bag or a exhaust blower) This is getting expensive, and im not even close to being rich.....I have already had to sell off some of my knives..(my other hobby)

It a shame that some threads get purged/archived/deleted so quickly. I had one going with mad drawings and images of the tons of things I tried during the month of construction. I really want to help you both but cant right now. Honestly the one thing I could not find around here was good ventilation advice. I dont like thinking about the hell I went through and the lost baby's but I will try to helptomorrow if you want to drop me a PM.

I think this is the product I am going to start recomending to people;

Sam's Club - Lasko® Max Performance Pivoting Utility Fan

My father swears its $45.00 at SamsClub, I see them else where $79.00. There are NO specifications to be had anywhere online. I have been toying with one for about 2 hours. The footprint is roughly 16 inches wide and 8 inches, the tube looks to be an 8".

Hvae to run GUEST are here BBL

ive seen similar fans like that at wal mart and other places too and my friend has one they are pretty strong.. that being said should i pick one up for the exhaust or maybe use the 170 i have now for the exhaust and maybe have that one as a light exhaust? Yeah well the hyrdo store down the street sold me a 170 Ecoplus inline fan and it was $140 about. I guess i shoudl just go on ebay and pick up one for cheaper it doesnt necisarilly ahve to be brand new thanks for the advice guys again.. how much CFM shoudl i look into getting though? I coould either use my 170 for the cooltube or use the 170 as the box exhaust or vise versa..?

thanks again for trying to help man i appreciate it

Ok i drew this plan out so you know exactly what im looking at. The first picture is what i currently have set up with the heat problems. The 2nd picture is i think is what im going to need to do to fix the heat problems.. Would something like this fan
Sam's Club - Lasko® Max Performance Pivoting Utility Fan
be enough for the cooltube setup. That way i can use my 170 for just the box.
anyone think that would work?

try reversing your carbonfilter. fans work way WAY more efficent when they are pulling than pushing. your filters probably restricting your flow. also check the specs on your filter. if its like mine, i have a can filter, it has to be in the room pulling the air thru it. its not made to operate any other way. get that cool tube seperate from the room, attatch a tube to the open end and put ut thru the wall to pull fresh air thru it instead of room air. use your fan and light seperate. also your filter might break down at higher heats and will leave a smell when your flowers are in big bloom, so you might want to seperate the light and filter anyway

well right now the filter isnt even on the ducting becasue im trying to get heat down first so there is no restriction from it right now but i will switch it. Yes i need to get the light seperated from the box itself. So would the above fan be sufficient enough for the cooltube to suck fresh air through it and exhaust it out of the closet? I know ill be able to connect ducting to that fan where it sucks the air in (the circle part) and blows the air out of the rectangular part so i know ill be able to keep the exhaust from the light out of the closet i just need to know if this fan will be enough to do it?

yo if heats your problem . its because you have no real intake fan. just a fan in front of a dutcing?