Mousemesh and Airflow: Technical Data
Mousemesh are conscious that airbricks are designed to allow air flow into buildings and have commissioned a testing programme to measure the air flow through an airbrick over which a Mousemesh grille had been secured.
The following results were obtained by L & F Solutions:
The equivalent area calculation for Mousemesh are:
- Single ventilator grill equivalent area:: 10,380 square millimetres- 77% free air flow
- Medium ventilator grill equivalent area: 20,780 square millimetres - 77% free air flow
- Large ventilator grill equivalent area: 31,470 square millimetres - 77% free air flow
Mousemesh will not interrupt air flow, even with atmospheric conditions taken into consideration any perceived interruption is negligible. It is, however, advisable to maintain Mousemesh grilles once fitted by using a small brush to clear any obstacles such as the build up of dust, leaves etc.
L & F Solutions are members of the Air Tightness Testing and Measurement Association (ATTMA) and they may be contacted at:
L & F Solutions
Unit 3 Beech Farm Offices
Lymm Road
Thelwall
Werrington
WA4 2TG
01925 758999
All members of ATTMA have been accredited by UKAS to ISO/IEC 17025, with a scope covering air tightness testing to ATTMA technical standard 1 and BS EN:13829 (2001). This third party accreditation demonstrates the technical competence of ATTMA members in carrying out air tightness testing, including calibration of equipment used and training of staff carrying out the test.