Our Flap ventilators consist of Ecofeu Premium Alu 110 SCE Incendia mono flap ventilator Ecobac 160 PN/TC SHEV Ecobac DV 110 for arcade rooflight Ecofeu 160 EL/PN/TC Ecofeu DV 110 double flap ventilator Ecofeu Premium Alu 160 PN Fumetica double flap vent large extraction capacity Fumetica-S double flap system inclination of 7° Duo Therma double flap ventilator Ecofeu 110 SCE Smoke vents for stairwells