Important:  ALL FANS WITH EXTENSION TUBES GREATER THAN OR EQUAL TO 4 FT. MUST USE GUY WIRES TO PREVENT LATERAL MOVEMENT OF THE FAN. IN SOME CASES, FANS WITH EXTENSION TUBES THAT ARE LESS THAN 4 FT. MAY REQUIRE GUY WIRES IF THE FAN MOUNTING STRUCTURE IS NOT RIGID ENOUGH. REGARDLESS OF THE EXTENSION TUBE LENGTH, IF ANY OSCILLATION IS OBSERVED DURING FAN OPERATION GUY WIRES SHOULD BE INSTALLED. 

Important: PLEASE BE SURE TO CHECK INSTALLATION MANUAL FOR PROPER CLEAREANCES, CORRECT MOUNTING OPTIONS, EXTENSION TUBES, ETC.