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Whats the best location for cold air intake?
- Thread starter Tonygreen
- Start date
the best place to draw air into the room would be from the house itself . the temps are regulated by your heat source for winter , so your not drawing in extremely cold air & theres plenty of CO2 in your living space for the plants . your exhaust is what needs to be exhausted outside or into the basement or attic space . anywhere out of the lung room/bedroom . get a titan mercury 4 to adjust the exhaust fan speeds by temperature of the flower room . lights on fan speeds up till temp is reached , lights off the fan speed slows down cuz theres not as much heat to exhaust .
that intake in my window i showed ya last night , once the outside temps get too cold , i'll drop that intake hose & block the vent from outside & my attic space will be good enough to feed the flower room & veg room . just not cold enough yet , i still need the fresh air from outside to try & cool my attic space , its 10 degrees hotter up there with just the veg light on than it is outside .
Hmmmm...hot air rises, cold air sinks. My vote would be a register of sorts in the ceiling--so incoming cool air can cool the environment as it "sinks" to the floor.
I like my intake down low and exhaust up high...
Philosophelon
Member
I also agree with dansbuds that it would be more stable to draw air from your house/whatever. But if you intake air from your house (which is a good idea, you can recycle the heat into your house to save energy), you should just recirculate it and use your house as a lung room because you'll waste energy if you exhaust it outside.
*edit - this only applies in the winter.
It's incorrect to exhaust outside unless you're also letting outside air in somewhere else, particularly if there are gas or oil fired furnaces or water heaters. A backdraft down the chimney can easily occur, causing combustion products to enter the living space. Bad mojo.
Lots of ways to look at it. With two stage ventilation, the light(s), hood(s) & ducting can use outside air at all times, both intake & exhaust, or inside air can be used in cold weather instead. With good sealing, no odor control is required on that air circuit so good circulation can be easily achieved. Large amounts of heat never enter the grow space or the living area. Insulated Ducts & fixtures help with that. A separate fan moves inside air through the grow space both coming & going where odor control will be necessary. Pressure differential inside vs outside remains neutral.
Lots of ways to look at it. With two stage ventilation, the light(s), hood(s) & ducting can use outside air at all times, both intake & exhaust, or inside air can be used in cold weather instead. With good sealing, no odor control is required on that air circuit so good circulation can be easily achieved. Large amounts of heat never enter the grow space or the living area. Insulated Ducts & fixtures help with that. A separate fan moves inside air through the grow space both coming & going where odor control will be necessary. Pressure differential inside vs outside remains neutral.
A
acridlab
Agree with down low, furthest point from ur exhaust, which would b up high..
i run my passive intake rooms like u would with traditional hvac. a line of ducting on the ceiling from one end of the room to the other, with a slit/ opening every 2 feet. pump ur cool outside air in from wherever u can get it. its worked great in the winter, as long as the temperature is fairly consistent. Winter changes so much here in CO one day its 20 then next its 75. its still worked out pretty well tho. summer isnt even worth it tho, even running lights at night
olekingkole
Active member
phazer seems to be using the same method as DJM, who I believe is also in Colorado. Seems to work great there.
https://www.icmag.com/ic/showthread.php?t=300255
It comes down to passive or active exhaust- cold air intake high for passive, low for active.
https://www.icmag.com/ic/showthread.php?t=300255
It comes down to passive or active exhaust- cold air intake high for passive, low for active.
ya king koles right, run it just like djm, i recommend everyone read his feed. except i have my rooms completely sealed with no exhaust port. djm has a carbon filter that air eventually gets pushed threw. i decided against that to help keep my humidity up in the 60+ range works great.
my Colorado connection.. said that all the big operations down there over 6000w.. rooms. are running cold air intake up top.. as it drops lower and mixes with the hot air to lower the entire rooms temp.. seems to work better for them.. so figured id just Leave this here lol..
