Grow Room Feedback Please - Intake and Exhaust Configurations

[Animatey]

82f and 60RH are great for all phases of growth as long as you have some fans moving air in your tent (to prevent mold).

82 and 60 puts the VPD at 1.5 which is solid, and plants will grow well in these conditions. I attached a VPD chart so you can see what temp and humidity combinations are best.

At temps any higher than 83,84 things can get dicey but a max of 82 is good IMO.

You could put a vent on the closet door to allow more fresh air in.

 

[MesaBoogie]

you actually have temperature issues, the best option is probably to vent into the attic.

Just thought I would mention for future readers down the road , this is a really bad idea if you live in a cold climate.

 

[AutoWonders]

Thanks for the read and the reply! I like your thinking and I think in my current configuration I accomplish that.....intake on lower sock on left and exhaust starting on the upper right with the carbon filter, then the muffler and then the exhaust fan.....or did I misinterpret your post?

Geez, I forget that have my fan/filter outside my tent. So disregard reply.

 

[Bestbud]

Your goals should be to vent/exhaust heated air and filter it before it gets into your home or outdoors. Seems most everything you want to do involves venting everything right back into the same closet, a closed system, just going to heat-up. And there is no "fresh air from the closet" with everything being vented into it. If it's too hot, you need to get rid of the heated air and replace it with cooler air (one way or another).

Thanks for the great reply, I could not have summarized my current thinking any better. To clarify, my greatest concern actually isn't about the grow environment it's about the closet environment and the affect that heat and humidity will have on those belongings. I agree with your statement that in a closed system anticipate temp and humidity to be the same.

Also, I'm pretty sure you want to muffle the noise at the exhaust point. Put the muffler as the very last thing.

From the manufacturer "Place your Phat Muffler on the intake side of your fan/blower for maximum sound attenuation if you only have one muffler. For maximum sound attenuation on a blower/filter line, place one muffler on the blower intake and one muffler on the blower outtake." I made the more economical and space conscious decision of just one muffler.

Regarding your fans, with that size tent, just using that main exhaust should be more than good enough to move air through rapidly (stale air from the closet).

I like this suggestion, thank you.

After the current grow ends I'm going to reconfigure my exhaust with the AC Infinity Variable Speed 350 CFM Fan and exhaust it into the closet. I'm then going to use the Active Air 6 inch In-Line Fan (400 CFM) with no speed controller for the intake and run my flexible ducting to the bottom of the door to an End Register Box like this:

My temp/RH reduction hypothesis is that drawing the cooler/drier air from outside the closet will reduce the temps and RH inside the closet but they will still be higher than outside the closet (but lower than they currently are).

My odor control hypothesis is that by better balancing the air pressure inside the tent (and therefore the airflow through the filter) I can eliminate any odors outside the tent.

Thanks for all of the fine dialogue and discussion. I will report back with findings as they become available.

 

[Bestbud]

Geez, I forget that have my fan/filter outside my tent. So disregard reply.

All good, thanks for the read!

 

[LazyNhazy]

The main issue I see is you are only recurculating the air that is already there. If you have the skills and dont mind a hole in closet ceiling you could exhaust air into crawlspace above and that would create a negative pressure which should bring fresh air in through cracks of door.

 

[Bestbud]

The main issue I see is you are only recirculating the air that is already there. If you have the skills and don't mind a hole in closet ceiling you could exhaust air into crawlspace above and that would create a negative pressure which should bring fresh air in through cracks of door.

Thanks for the read and the thoughtful reply. Like many of us here I'm trying to enjoy my "hobby" and stay married which could easily be challenged by cutting holes anywhere in our brand-new home (that would be like plan z). Since compromise is my middle name I'm going to aim for the same temp/RH as the rest of the house which is 70F and 50% - I think with a few changes already discussed in earlier posts that I can lower my current 82F and 60% to 74F and 55% which I can live with.

 

[dickfitzwell]

Your wife won't mind If you rip a closet door off

lol

 

[Animatey]

Louvered closet doors would also help w/ getting fresh air in the closet, look nice and can be inexpensive. (or add a vent to existing door if you are handy that way)

At our last house, I took the closet doors off and hung a curtain which actually looked better than the door. Just choose a curtain (or let the wife choose) that matches the room.

Good luck!

Sent from my Moto G (5) Plus using Tapatalk

 

[Bestbud]

Louvered closet doors would also help w/ getting fresh air in the closet, look nice and can be inexpensive. (or add a vent to existing door if you are handy that way). At our last house, I took the closet doors off and hung a curtain which actually looked better than the door. Just choose a curtain (or let the wife choose) that matches the room. Good luck!

Thanks for the read and the very thoughtful response. All of these responses have me contemplating various solutions. The current door is a 6-panel white interior model and I thought about this door:

but then I put down the pipe and remembered that all structural changes associated with my "hobby" needed to have Executive Approval and that wasn't going to happen. I then did some looking around and found these:

which when I stealthily install them in the current door - I will be in the fresh air business.

Thank you again to everyone that voiced an opinion, they all count from where I'm standing and they will make a meaningful difference in future grows. I am very fortunate to have found this community!

Peace