1. BS EN 13141-8. Ventilation for buildings. Performance testing of components/products for residential ventilation. Part 8. Performance testing of non-ducted mechanical supply and exhaust ventilation units (including heat recovery) (22nd January 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (56 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗