Portable AC creating too much negative pressure. HELP

[ShibaSpeak]

I have a single hose portable AC inside my medical grow room built inside my garage. The problem is its creating too much negative pressure and due to the garage being so hot the air it is bringing in is causing the room not to cool well. Should I move the AC outside the room and duct the cool air in or something else? Please help.

ShibaSpeak Reviewed by ShibaSpeak on 07-06-2012. Portable AC creating too much negative pressure. HELP I have a single hose portable AC inside my medical grow room built inside my garage. The problem is its creating too much negative pressure and due to the garage being so hot the air it is bringing in is causing the room not to cool well. Should I move the AC outside the room and duct the cool air in or something else? Please help. Rating: 5

[ShibaSpeak]

The AC is also the only air exchange happening in the room currently. Other then that its pretty well sealed.

[ShibaSpeak]

Room is 10x10 AC is oversized (13k BTU if I remember currectly). Temp is having trouble dropping below 83 degrees, room is for veg only

[painretreat]

The exhaust from the unit should be vented outside. Like on the instructions of the a/c unit. pr

[ShibaSpeak]

The exhaust from the unit should be vented outside. Like on the instructions of the a/c unit. pr

The 100 degree exhaust going into my 115 degree garage isnt whats causing the issue. The room pulling in 115 degree air from my garage is. Thankyou though.

[azdesertdweller]

i run a portable a/c....the heat will accumulate(increase)...you have to power vent(an additional draw fan is required because the a/c cannot PUSH enough air to cool itself... it if it stayes inside...these little units MUST be able to cool themselves to operate properly

[ShibaSpeak]

i run a portable a/c....the heat will accumulate(increase)...you have to power vent(an additional draw fan is required because the a/c cannot PUSH enough air to cool itself... it if it stayes inside...these little units MUST be able to cool themselves to operate properly

I moved it to the outside of the room into the garage ducting the cold air in. Its creating positive pressure but I put in a backdraft flange to alleviate that. Now it seems like the AC keeps going cold to hot cold to hot. :/

[azdesertdweller]

this is the bane of my existance...fuggin HEAT...you say you're in the garage?does it have vents up top?......i've experimented with (sealing the rear of the a/c unit and power venting it out,unless you have a major drawing inline fan...it makes the unit heat up...no good...you have to vent the garage,find a way to stick the front of the unit inside the growing chamber,leave the rear outside...if you can, power vent the garage....its trial and tribulation my friend...

[ShibaSpeak]

this is the bane of my existance...fuggin HEAT...you say you're in the garage?does it have vents up top?......i've experimented with (sealing the rear of the a/c unit and power venting it out,unless you have a major drawing inline fan...it makes the unit heat up...no good...you have to vent the garage,find a way to stick the front of the unit inside the growing chamber,leave the rear outside...if you can, power vent the garage....its trial and tribulation my friend...

I moved it to the outside of the grow room having it pump cold air in and that seems to work for now. My new problem though is it keeps throwing the breaker after 45 minutes or so worth of use. Theres a fluorescent light and 2 small fish tanks hooked up to the same 20 amp breaker and the AC uses 11 amps so I should be fine by a wide margin of error. Any thoughts?

[azdesertdweller]

run the a/c on a seperate line....(breaker).......I don't think thats the fix tho....its throwing the breaker because the a/c unit is too hot....you HAVE to vent the garage