EcoVent Verso - Structural Frame Set for Facade - coated for decentralized ventilation unit KWL EC 45 wall installation sleeve DN 180 made of polypropylene. Required core drilling: DN 200, length: 800 mm. Includes 2 plaster covers for inside and outside, to protect against contamination during the construction phase. EPP wedges for securing the wall sleeve with slope for safe condensation drainage. Includes a 2-part stainless steel facade cover with protective coating for use in environments with high air pollution or high salt concentration in the air (coastal areas). Includes an adhered seal.