MarkFerraro
Member
I finally finished my assembly of the CV 1800 in a sound closet.
The closet was built free standing inside my shop. The walls consist of 5/8 inch Sheetrock (both inside and outside the closet)on 2x4 framing with fiberglass insulation in the walls and ceiling. I hung double solid wood doors with exterior weather stripping. For return into the shop, I framed out two return plenums. Both have 12 inch x 12 inch grills with filters. One grill is set high, with an baffle set midway between the studs that directs the return air down the inside of the wall and then allows a chase for form up the other side so the air goes into the high set grill, runs down the inside of the wall, passes through an opening at the bottom and then runs back up the inside of the wall to exit the outside wall through an unfiltered grille.
I am stunned at how much air pressure there is in the closet, trying to get out of the closet. Right now I am only using one of the 12x12 return grilles.
I'm also stunned at how quiet the whole arrangement is running. My shop is in a basement. The entire shop floor is 2 layers of 3/4 inch plywood laid at right angles over 1 inch of solid foam paneling. There are no wooden sleepers under the floor.
I am pleased as punch at how quiet the cyclone is running.
But I do have some questions:
1: Should I open up the second 12x12 return air grille? This grille is set by the floor, while the other grille is set 9.5 feet above the closet floor. the idea was the return air would draw both high and low temperature air out of the closet and expel it, thus aiding in the cooling of the motor.
2: With the one high set exhaust grille open, the air pressure on the doors is tremendous. If I set the bolts on one door that forms the jamb for the second door, the second door cannot be closed if the cyclone is running. I'm 300 pounds and I cannot shut the door. If the doors are closed and bolted and the cyclone is turned on, lots of air is leaking out of the second door because I have only one throw bolt holding the door closed at the top. I'm adding one or two bolts to the second door: one at the bottom and maybe one in the middle.
I guess I was thinking that a 6 inch round intake pipe couldn't over pressurize the closet or impede air flow if there was a single 12x12 exhaust. I included the second exhaust just in case, but now think it might be needed. Any facts or opinions as to how much air exhaust volume we have to allow for? I'm sure the nominal 12x12 grille is actually something like 10x10 in actual air flow ability.
So to recap my question:
Is a single 12x12 return air chase/plenum enough volume or should I open the second 12x12 return air chase/plenum?
Thanks in advance,
The closet was built free standing inside my shop. The walls consist of 5/8 inch Sheetrock (both inside and outside the closet)on 2x4 framing with fiberglass insulation in the walls and ceiling. I hung double solid wood doors with exterior weather stripping. For return into the shop, I framed out two return plenums. Both have 12 inch x 12 inch grills with filters. One grill is set high, with an baffle set midway between the studs that directs the return air down the inside of the wall and then allows a chase for form up the other side so the air goes into the high set grill, runs down the inside of the wall, passes through an opening at the bottom and then runs back up the inside of the wall to exit the outside wall through an unfiltered grille.
I am stunned at how much air pressure there is in the closet, trying to get out of the closet. Right now I am only using one of the 12x12 return grilles.
I'm also stunned at how quiet the whole arrangement is running. My shop is in a basement. The entire shop floor is 2 layers of 3/4 inch plywood laid at right angles over 1 inch of solid foam paneling. There are no wooden sleepers under the floor.
I am pleased as punch at how quiet the cyclone is running.
But I do have some questions:
1: Should I open up the second 12x12 return air grille? This grille is set by the floor, while the other grille is set 9.5 feet above the closet floor. the idea was the return air would draw both high and low temperature air out of the closet and expel it, thus aiding in the cooling of the motor.
2: With the one high set exhaust grille open, the air pressure on the doors is tremendous. If I set the bolts on one door that forms the jamb for the second door, the second door cannot be closed if the cyclone is running. I'm 300 pounds and I cannot shut the door. If the doors are closed and bolted and the cyclone is turned on, lots of air is leaking out of the second door because I have only one throw bolt holding the door closed at the top. I'm adding one or two bolts to the second door: one at the bottom and maybe one in the middle.
I guess I was thinking that a 6 inch round intake pipe couldn't over pressurize the closet or impede air flow if there was a single 12x12 exhaust. I included the second exhaust just in case, but now think it might be needed. Any facts or opinions as to how much air exhaust volume we have to allow for? I'm sure the nominal 12x12 grille is actually something like 10x10 in actual air flow ability.
So to recap my question:
Is a single 12x12 return air chase/plenum enough volume or should I open the second 12x12 return air chase/plenum?
Thanks in advance,