Approval provisions
Approval provision | ER-UPD EC + ER EC / ER EC 2.1/second room connection | ER-UPB EC + ER EC / ER EC 2.1 |
|---|---|---|
Number of units per floor, residential unit or fire zone | Max. 3 fans or 3 connections | Max. 3 fans or 3 connections |
Shaft wall | min. 35 mm , board material, any | min. 35 mm , board material, any |
Connection diameter | DN 75 or DN 80 mm | |
Connection ducts inside the shaft | Steel folded spiral-seams duct between main duct in shaft and ER unit, max. 2 m long (→ approval) | Flexible aluminium duct AFR 80 or steel folded spiral-seams duct between main duct in shaft and ER unit, max. 2 m long (→ approval). . |
Connection ducts outside the shaft | Steel folded spiral-seams duct DN 75 or DN 80 between main duct in shaft and ER 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. 2 x 90° | |
Number of duct elbows permitted for ceiling installation
| Max. 2 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 | |
