| AIR BRICK Adaptors | CAVITY TRAYS LTD |
| DOMUS VENTILATION |
| GDHV HEATING - GLEN DIMPLEX HEATING & VENTILATION |
| LINDAB LTD |
| TIMLOC BUILDING PRODUCTS |
| VERPLAS LTD |
| AIR BRICK Cowls | DOMUS VENTILATION |
| TIMLOC BUILDING PRODUCTS |
| AIR BRICK Ducting | CAVITY TRAYS LTD |
| DOMUS VENTILATION |
| GDHV VENTILATION - GLEN DIMPLEX HEATING & VENTILAT |
| LINDAB LTD |
| TIMLOC BUILDING PRODUCTS |
| VERPLAS LTD |
| AIR BRICK Grilles | DOMUS VENTILATION |
| GDHV VENTILATION - GLEN DIMPLEX HEATING & VENTILAT |
| LINDAB LTD |
| TIMLOC BUILDING PRODUCTS |
| VERPLAS LTD |
| AIR BRICK Sleeves | CAVITY TRAYS LTD |
| AIR BRICK Ventilators | CAVITY TRAYS LTD |
| HAMBLESIDE DANELAW LTD |
| TIMLOC BUILDING PRODUCTS |
