Approval provisions
Approval provision | ER GH |
|---|---|
Number of units per floor, residential unit or fire zone | Max. 3 fans or 3 connections |
Connection diameter | DN 75 or DN 80 |
Shaft wall | Any board material |
Connection ducts inside the shaft | For example, AFR 80 flexible aluminium duct between the main duct in the shaft and unit, max. 2 m long (→ approval). |
Connection ducts outside the shaft | For example, AFR 80 flexible aluminium duct between the main duct in the shaft and unit, max. 6 m long (→ approval). |
Duct elbows in the unit connection duct | max. 90° bend, ascending |
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 |
