GX12 window fans have remained a byword for commercial windowfans for over 40 years. Supplied with longer ladder strips for ease of installation and with safety finger-guard integrated into the housing and the window grille. Plus, a tamper-proof positive plug and socket assembly provides a means of isolation for service access. Both 9" and 12" models are reversible and feature an enclosed external rotor motor providing constant volume outputs, even in gusty external conditions.