While this summer in southern Minnesota has not been anywhere close to having record heat, I’ve still had quite a few discussions with growers and managers about maximum ventilation rates for heat relief. The basic question has been – how do I know if I have enough fans in my hog barn?

If you have enough fans (assuming you also have enough air inlets), the average room air temperature should be within a couple of degrees of outside air temperature. That is, if you are moving sufficient air thru your facility the temperature rise in the air should be only 2-3F before it is exhausted from the facility.

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