| DUCT SILENCERS | DOMUS VENTILATION |
| EXYTE HARGREAVES LTD |
| GDHV VENTILATION - GLEN DIMPLEX HEATING & VENTILAT |
| IAC ACOUSTICS |
| iDuct Ltd |
| LINDAB LTD |
| TROX UK LTD |
| VERPLAS LTD |
| ZEHNDER LTD |
| DUCT SILENCERS Acoustic Diffuser | IAC ACOUSTICS |
| DUCT SILENCERS Exhaust Air Terminal Combined | LINDAB LTD |
| DUCT SILENCERS For Smoke Control Systems | LINDAB LTD |
| DUCT SILENCERS Heavy Duty | IAC ACOUSTICS |
| DUCT SILENCERS Packless | IAC ACOUSTICS |
| DUCT SILENCERS Purpose Made | IAC ACOUSTICS |
| LINDAB LTD |
| DUCT SILENCERS PVC | VERPLAS LTD |
| DUCT SILENCERS Reactive | IAC ACOUSTICS |
| DUCT SILENCERS Rectangular | DOMUS VENTILATION |
| IAC ACOUSTICS |
| LINDAB LTD |
| DUCT SILENCERS Sound Absorbing | DOMUS VENTILATION |
| LINDAB LTD |
| ZEHNDER LTD |
| DUCT SILENCERS Tubular | IAC ACOUSTICS |
| DUCT SILENCERS Ultra-Clean Environments | IAC ACOUSTICS |
