APPROVED DOCUMENT F – 2010 EDITION

a)

All fixed mechanical ventilation systems to be commissioned and Commissioning Notice given to Building Control

b)

For new dwellings, Air flow rates of all mechanical vents must be measured on site and a Notice given to Building Control

c)

Owner to be given operating and maintenance instructions

Examples for determining minimum ventilation requirements are included in Appendix C and should be followed.

Further technical information and an installation check-list is included in the new Domestic ventilation compliance guide. This includes such matters as max length of flexible duct (3m), must fall externally, insulated in loft and be provided with a condensate trap if vertical.