Airone were preferred at Trabzon-Gumushane ongoing construction of 14.5 kilometers of new Zigana Tunnel on the highway after Turkey's second longest, is the fourth longest tunnel in the world, 14 thousand 300-meter-long tunnel Ovit.
Aironn completed a total of 225 kW 2250 mm 4 smoke exhaust fans, 250 kW 2250 mm diameter 1 fresh air fan, 90 45 kW 1250 mm diameter jetfan and 12 positive pressurizing fan shipments. Ovit designed as an example of Turkey to the interior design of the lighting project Tunnel will be opened at the end of the year.