Zero Relative Humidity

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I am modeling a supermarket with a warehouse in back. The warehouse is equipped with unit heaters to warm indoor air to 55 deg. F (Max) and exhaust fan capacity of 22,000 cfm. I modeled infiltration as 9 cfm/sq.ft. per rollup door and set the exhaust fans to purge twice a day for 2 hours total. The 55 deg. F setpoint is scheduled, and the facility is in the deep south (Florida).

I am consistently getting humidity values of zero in the hourly report (RH, *, Twet-bulb, doesn't matter). Anyone ever had similar experience?



Daniel L. "Dan" Briller P.E., LEED AP BD+C
Energy/Environmental Engineer
10748 Deerwood Park Boulevard South
Jacksonville, FL 32256-0597
Phone: 800-741-2014 x2329 / Mobile: 571-314-4002
Dan.Briller at

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