Grain Systems PNEG-269 - Manual (Page 5)

5
Electric Heater
SAFETY
Roof Damage Warning And Disclaimer
GSI DOES NOT WARRANT ANY ROOF DAMAGE CAUSED
BY EXCESSIVE VACUUM OR INTERNAL PRESSURE FROM
FANS OR OTHER AIR MOVING SYSTEMS. ADEQUATE VEN-
TILATION AND/OR "MAKEUP AIR" DEVICES SHOULD BE
PROVIDED FOR ALL POWERED AIR HANDLING SYSTEMS.
GSI DOES NOT RECOMMEND THE USE OF DOWNWARD
FLOW SYSTEMS (SUCTION). SEVERE ROOF DAMAGE CAN
RESULT FROM ANY BLOCKAGE OF AIR PASSAGES. RUN-
NING FANS DURING HIGH HUMIDITY/COLD WEATHER
CONDITIONS CAN CAUSE AIR EXHAUST OR INTAKE PORTS
TO FREEZE.