first room, heat from dual 400w hps

crazeehaze

crazeehaze

Well-Known Member
Hi guys.

ive recently buildt a new house and have 1 room upstairs that not in use. its rigged for a future bathroom but at the moment its only drywalls, a drain, 1 exhaust vent thats connected too kitchen fan downstairs. ( 1st floor bathroom, 1st floor office and the "growroom" is connected too this).

other than that the room is completely sealed off and i really dont want too start making holes all over the place in a brand new house ;p

this room is 8,85 feet x 7,20 feet ( 63 sq/f) or 2,7m x 2,2 ( 5,94 m2)

this will be my first grow so any pointers on things ive missed is much apreciated.

the plan:

white rubber cover on floor, walls covered with diamond mylar,
2 x 400w hps ceiling mounted,
ocillating fan,
will make 1 hole in wall for air intake from large office next too it with aprox 150-200mm fan of some sort.

the exhaust however is as mentioned the kitchen fan :) it cant be turned off actually and is constantly slowly spinning all the time.

if i put my hand in the vent in growroom i can feel the draft barely but not much.

i have a wife.. lets just say i cant put the kithcen fan on max 24\7 ;p so this light draft is all i got..

planning about 20 Lowryder 2's or 15-20 Masterlow .my ceiling isnt that high all the way. hence the midgets

what do you think? will i get a heat problem from dual 400w considering poor exhaust?

will tiny ass coalfilter in kitchen fan deal with the smell?

thank you in advance for any responses.

bongsmilie
 
D

drywall

Active Member
i think two 400s will be a good amount of light for your area but i think 20 plants will generate too much smell unless you use a good carbon filter. they have them on e-bay in packages with fans. you get ventalation + heat and smell control two birds with one stone.
 
crazeehaze

crazeehaze

Well-Known Member
drywall said:
i think two 400s will be a good amount of light for your area but i think 20 plants will generate too much smell unless you use a good carbon filter. they have them on e-bay in packages with fans. you get ventalation + heat and smell control two birds with one stone.
Click to expand...

i decided too shut the vent from kitchen fan.

bought a 150 cfm inline today and will just make a hole in the roof directly into the attic.
25 dollars w00t:)

carbon filter are so damn expensive and my budget is allready stretching thin..

but say.. 15 plants.. 150 cfm exhaust into attic wich is an "open cold attic" if you know what i mean. its freezing up there cus the roof is pretty much wide open all the way around the house.

could i really get odor issues if i do that? as previously stated its my first grow so have no idea what too expect odor wise.
 
Man o' the green

Man o' the green

Active Member
crazeehaze said:
... 150 cfm exhaust into attic wich is an "open cold attic" if you know what i mean. its freezing up there cus the roof is pretty much wide open all the way around the house.

could i really get odor issues if i do that? as previously stated its my first grow so have no idea what too expect odor wise.
Click to expand...
I have a similar setup with an exhaust into the attic. I don't have odor issues, but I constantly worry about condensation without a dedicated vent tube to the outside. So far I've been lucky.
 
crazeehaze

crazeehaze

Well-Known Member
Man o' the green said:
.. but I constantly worry about condensation without a dedicated vent tube to the outside. So far I've been lucky.
Click to expand...
yea you got a point.. in my case right now the vented air would meet a temperature drop of over 20 degrees celcius.. i can imagine condensation happening, but will just have too try it and see what happens.

its my last option
 
TheDifferenceX

TheDifferenceX

Well-Known Member
crazeehaze said:
Hi guys.

ive recently buildt a new house and have 1 room upstairs that not in use. its rigged for a future bathroom but at the moment its only drywalls, a drain, 1 exhaust vent thats connected too kitchen fan downstairs. ( 1st floor bathroom, 1st floor office and the "growroom" is connected too this).

other than that the room is completely sealed off and i really dont want too start making holes all over the place in a brand new house ;p

this room is 8,85 feet x 7,20 feet ( 63 sq/f) or 2,7m x 2,2 ( 5,94 m2)

this will be my first grow so any pointers on things ive missed is much apreciated.

the plan:

white rubber cover on floor, walls covered with diamond mylar,
2 x 400w hps ceiling mounted,
ocillating fan,
will make 1 hole in wall for air intake from large office next too it with aprox 150-200mm fan of some sort.

the exhaust however is as mentioned the kitchen fan :) it cant be turned off actually and is constantly slowly spinning all the time.

if i put my hand in the vent in growroom i can feel the draft barely but not much.

i have a wife.. lets just say i cant put the kithcen fan on max 24\7 ;p so this light draft is all i got..

planning about 20 Lowryder 2's or 15-20 Masterlow .my ceiling isnt that high all the way. hence the midgets

what do you think? will i get a heat problem from dual 400w considering poor exhaust?

will tiny ass coalfilter in kitchen fan deal with the smell?

thank you in advance for any responses.

bongsmilie
Click to expand...
Sounds like you got the right idea...

I could see you running into problems w/ heat w/ a dual 400 watt... especially w/o much exhaust... I'd monitor at first, but be perpared to have to do something... If you only felt a small draft from the fan, that's not going to do much...

I'd look into ONA (Odor neutralizing agent)... Properly used, you can eliminate the smell completely... A local hydro shop may even have a spray version that a friend says works wonders... it's like an air freshener spray...

You may even consider building a box, or using a grow tent inside the room.. That way you could do your proper intake/exhaust.. Even if it took up half the room, you wouldn't be cutting into the walls of your new house... You could then use the ONA gel/spray or a Carbon Filter inside the room to eliminate the odor..

Good Luck to you whatever you choose to do!! happy tokin!!!
 
E

EverythingHydro.com

Active Member
Talk about a loaded question. If 100 people answer this post you'll get 100 different opinions.

It's best to ask specific questions.

In general, you need to be concerned about temp, ventilation, airflow and odor.

Temp: two 400w systems in a 9x7 foot room with ventilation and airflow will not be too hot. It won't be 75 degrees but it will be in a safe range.

Ventilation: 150 cfm? Mooooore than enough.

Airflow: "completely sealed off"....where is the airflow coming in from? Just make sure air can get into the room. :-)

Odor: Your fan will keep the odor out of the room but put it into the attic. The good news is, nearly all new construction is designed for air circulation so the house can breath.

My suggestion....Put the vent fan not only through the ceiling but through the roof. It shouldn't cost much at all to do it, just labor.
 
crazeehaze

crazeehaze

Well-Known Member
Thank you very much thedifferenceX, will defenitly look into this ONA gel. have read before someone used it with great success. the kitchen fan exhaust in the grow room has been sealed shut and im currently installing a 150 cfm inline too exhaust into the attic.

will try too hide the hole in the roof from the wife HAHA.
 
crazeehaze

crazeehaze

Well-Known Member
EverythingHydro.com said:
Talk about a loaded question. If 100 people answer this post you'll get 100 different opinions.

It's best to ask specific questions.

In general, you need to be concerned about temp, ventilation, airflow and odor.

Temp: two 400w systems in a 9x7 foot room with ventilation and airflow will not be too hot. It won't be 75 degrees but it will be in a safe range.

Ventilation: 150 cfm? Mooooore than enough.

Airflow: "completely sealed off"....where is the airflow coming in from? Just make sure air can get into the room. :-)

Odor: Your fan will keep the odor out of the room but put it into the attic. The good news is, nearly all new construction is designed for air circulation so the house can breath.

My suggestion....Put the vent fan not only through the ceiling but through the roof. It shouldn't cost much at all to do it, just labor.
Click to expand...
i will bee making 1 hole too the nextdoor office and make a miniduct with a 200mm computerfan as intake. i belive that will be pretty much right on the spot.

making a hole through the roof... well wife would go bud-ballistic if she even knew im making holes right and left through drywall :P so.. attic it is :P

ive been looking at your shop abit and i must say you got quite an assortment of fancy stuffz.

im gonna give it a try "as is" without a carbon filter.. but if "the shit hits the fan" ill pm you hehe

thank you all for the input
 
D

drywall

Active Member
i think you will be fine without a filter but the next time you have money to invest on grow goodies i would consider one. to reduce the paranoia of odor $150 bucks is nothing. also odor is more of a problem with some people than others because of different circumstances like distance from closest neighbor or how often you have company so if you are comfortable with the level of odor you should be fine you can also check out Ozone Jr.
 
DoeEyed

DoeEyed

Well-Known Member
I have a pair of 400w in a room that's 8x7x8. I draw air in through the floor from my dining room (temps in that room stay between 65F-70F year round) and exhaust the hot air into the next room over. Temps when the lights are on average between 75F-80F. I can tell you though that smell probably will be a problem. I only grow six at a time, and my ladies smell so strong I can taste them. Lights out the smell isn't bad - but when those lights fire up, within an hour of that I can actually start catching whiffs of them downstairs!
 
crazeehaze

crazeehaze

Well-Known Member
DoeEyed said:
I have a pair of 400w in a room that's 8x7x8. I draw air in through the floor from my dining room (temps in that room stay between 65F-70F year round) and exhaust the hot air into the next room over. Temps when the lights are on average between 75F-80F. I can tell you though that smell probably will be a problem. I only grow six at a time, and my ladies smell so strong I can taste them. Lights out the smell isn't bad - but when those lights fire up, within an hour of that I can actually start catching whiffs of them downstairs!
Click to expand...
that bad huh.. what are you growing? seems we have quite similar setup i guess.

what kind of room are you sending the exhaust to? and how many cfm?
 
purple voodoo#5

purple voodoo#5

Member
im not sure about heat from 400's. i dont use them. but 20 plants of any strain are going to let off alot of smell with out a carbon filter. so unless its ok to advertise the location of growing weed plants i would get a filter. if you can get in trouble for the plants were you live then i would take every precaution to keep the grow unknown to all. good luck with your room and your harvest. and remember to check the actual temp. under your lights at the canopy of your plants to see what temp they are feeling and not just the temp of air around thembongsmilie
 
DoeEyed

DoeEyed

Well-Known Member
crazeehaze said:
that bad huh.. what are you growing? seems we have quite similar setup i guess.

what kind of room are you sending the exhaust to? and how many cfm?
Click to expand...
At the moment, four GHS Train Wreck and a Moby Dick, and in a week and a half, my vegging girls will be going in as well (5 GHS White Rhino, 4 GHS White Widow, 1 Sour Cream and 1 LA Woman).

My exhaust is just going into a spare bedroom that I use to dry/cure for now, it'll be my flower room in the Spring. My fans are 8" inlines, from Home Depot ($35 each). 250CFM I think?:peace:
 
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