Approval provisions
Approval provision | ER-APB | ER-AP |
|---|---|---|
Number of units per floor, residential unit or fire zone | Max. 3 fans or 3 connections | Max. 2 fans or 2 connections |
Shaft wall | min. 35 mm , board materials (F90) | min. 35 mm , board material, any |
Connection ducts inside the shaft | AFR 80 flexible aluminium duct between the main duct in the shaft and unit, max. 2 m long (→ approval). | |
Connection ducts outside the shaft | Steel folded spiral-seams duct, between the main duct in the shaft and the unit, max. 2 m long (→ approval). | Steel folded spiral-seams duct or flexible aluminium duct, between the main duct in the shaft and the unit, max. 2 m long (→ approval). |
Duct elbows in the unit connection duct | Max. 90° bend, | |
Number of duct elbows permitted for wall installation
| Max. 1 x 90° | Max. 2 x 90° |
Number of duct elbows permitted for ceiling installation
| Max. 2 x 90° | Max. 3 x 90° |
Regulating equipment in the exhaust air duct | Not permitted | |
Wall/ceiling opening for DN 80 unit connection duct | Brickwork or concrete: 130 mm. Board materials (F90): Outer Ø of pipe | |
