VKC5760 220mm x 90mm rectangular 0.5mtr Hi-Flow attenuator is manufactured from UPVC which is lined with acoustic material and has a minimum free area of 11,664mm². It has female adaptors for connection to 220mm x 90mm ducting.

The attenuator is fully compliant with SAP appendix Q product characteristics database recommendations for duct sizes used with both extractors (MVHR) mechanical heat recovery systems.

Specification DW/154 and will meet UL94HB flammability standard, designed for use with 220mm mega ducting range.