2 powered vents. Switched at the back of the shop by the electrical panels. The south unit is not operational and needs diagnosis and repair. The north unit is operational and seems to be thermostatically controlled (not verified). Unknown size or capacity.
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2 powered vents. Switched at the back of the shop by the electrical panels.
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Laser. 4", current cfm unknown.
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The south unit is not operational and needs diagnosis and repair. 7/9/14 with the switch on a humming noise could be heard on the roof. I suspect a stuck fan or a belt issue. The mushroom cap on the roof can be removed with an adjustable wrench for access.
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The north unit is operational and seems to be thermostatically controlled (not verified). Unknown size or capacity.