gearheadzgarage
Member
I've read a lot of posts/threads on this topic but none accurately reflect my situation so I hope everyone will read and share there opinions. I've tried to provide as much detail & relevant info as possible. Thanks in advance!
40' x 60' metal building, open trusses, 12' from floor to bottom of truss joists, est. 18-20' to roof peak, 2 x 8x10ft rollup doors, 1 x 10x12ft rollup door, all doors on long side (60'), soffit and ridge vents, concrete floor, NO insulation/barrier on walls or bottom of top beam of trusses. Located in N. Central FL, mid-high humidity and currently high 90's temps outside. West & North walls shaded. East & South walls full sun until midday & most of roof full sun until about 4PM.
In a feeble attempt to mitigate the heat, I open large door & farthest small door. Place 30" pedestal fan in large door & blow outside air into shop. As you would guess, this does little to nothing to decrease ambient heat throughout the shop. So, I've avoided the shop during the last few summers and I don't want to do that anymore. I'm attempting to be somewhat cost effective and frugal to preserve funds for my pending projects.
Question: Assuming no insulation is added, what would be the most effective means of lowering air temp in the shop? These are the only somewhat useful options that come to my mind:
Option 1: Large high CFM exhaust shutter fan at the top of one of the gable ends & a large vent grill at opposite gable end. My concern here is the open doors & vents will minimize the ability of the exhaust fan to generate enough pressure to evacuate the hot air. Would it work better to close the doors to create positive/negative pressure?
Option 2: Mid-Large shop floor fans in each door at opposite ends of the shop & blowing outside air into the shop. My theory is the "cooler" air would create more floor level air flow and push the hotter air up and out of the ridge & soffit vents. Is this even a valid theory?
Option 3: Any other suggestions?
40' x 60' metal building, open trusses, 12' from floor to bottom of truss joists, est. 18-20' to roof peak, 2 x 8x10ft rollup doors, 1 x 10x12ft rollup door, all doors on long side (60'), soffit and ridge vents, concrete floor, NO insulation/barrier on walls or bottom of top beam of trusses. Located in N. Central FL, mid-high humidity and currently high 90's temps outside. West & North walls shaded. East & South walls full sun until midday & most of roof full sun until about 4PM.
In a feeble attempt to mitigate the heat, I open large door & farthest small door. Place 30" pedestal fan in large door & blow outside air into shop. As you would guess, this does little to nothing to decrease ambient heat throughout the shop. So, I've avoided the shop during the last few summers and I don't want to do that anymore. I'm attempting to be somewhat cost effective and frugal to preserve funds for my pending projects.
Question: Assuming no insulation is added, what would be the most effective means of lowering air temp in the shop? These are the only somewhat useful options that come to my mind:
Option 1: Large high CFM exhaust shutter fan at the top of one of the gable ends & a large vent grill at opposite gable end. My concern here is the open doors & vents will minimize the ability of the exhaust fan to generate enough pressure to evacuate the hot air. Would it work better to close the doors to create positive/negative pressure?
Option 2: Mid-Large shop floor fans in each door at opposite ends of the shop & blowing outside air into the shop. My theory is the "cooler" air would create more floor level air flow and push the hotter air up and out of the ridge & soffit vents. Is this even a valid theory?
Option 3: Any other suggestions?
