| VENTILATION | AIRFLOW DEVELOPMENTS LTD (COMMERCIAL) |
| AIRFLOW DEVELOPMENTS LTD (DOMESTIC) |
| AIRVENT SYSTEMS LTD |
| CAVITY TRAYS LTD |
| COLT CLIMATE CONTROL |
| COLT SMOKE CONTROL |
| FLAKT WOODS LTD |
| GEZE UK LTD |
| Glow-worm |
| ITHO UK LTD |
| KLOBER LTD |
| NATIONAL DOMELIGHT COMPANY |
| POLYPIPE VENTILATION |
| RUSKIN AIR MANAGEMENT LTD |
| SANDTOFT ROOF TILES LTD |
| SE CONTROLS |
| SENIOR HARGREAVES |
| SWISH BUILDING PRODUCTS |
| TIMLOC BUILDING PRODUCTS |
| TROX UK LTD |
| UBBINK ROOFING & BUILDING PRODUCTS |
| UBBINK WHOLE HOUSE VENTILATION |
| VECTAIRE LTD |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENT AXIA DOMESTIC PRODUCTS |
| VENTILATION Abutments | UBBINK ROOFING & BUILDING PRODUCTS |
| VENTILATION Acoustic (Natural) | A1 BRIDGE FLUE SYSTEMS |
| CMS DANSKIN ACOUSTICS |
| RUSKIN AIR MANAGEMENT LTD |
| SE CONTROLS |
| TIMLOC BUILDING PRODUCTS |
| VENTILATION Air Brick | CAVITY TRAYS LTD |
| MANTHORPE GROUP |
| POLYPIPE VENTILATION |
| TIMLOC BUILDING PRODUCTS |
| UBBINK ROOFING & BUILDING PRODUCTS |
| VERPLAS LTD |
| VENTILATION Air Replacement System Units | JAGA HEATING PRODUCTS (UK) LTD |
| VENTILATION Bathroom | AIRFLOW DEVELOPMENTS LTD (DOMESTIC) |
| ITHO UK LTD |
| MONODRAUGHT LTD |
| POLYPIPE VENTILATION |
| VENT AXIA DOMESTIC PRODUCTS |
| VENTILATION Built-Up Roofing | ICOPAL LTD |
| VENTILATION Cavity Wall (Natural) | MANTHORPE GROUP |
| SE CONTROLS |
| TIMLOC BUILDING PRODUCTS |
| UBBINK ROOFING & BUILDING PRODUCTS |
| VENTILATION Cavity Wall (Powered) | AIRFLOW DEVELOPMENTS LTD (DOMESTIC) |
| POLYPIPE VENTILATION |
| VENT AXIA DOMESTIC PRODUCTS |
| VENTILATION Columns | BRUCE & HYSLOP (BRUCAST) LTD |
| VENTILATION Combined Light | MONODRAUGHT LTD |
| POLYPIPE VENTILATION |
| VENTILATION Commercial | AIRFLOW DEVELOPMENTS LTD (COMMERCIAL) |
| COLT CLIMATE CONTROL |
| FLAKT WOODS LTD |
| MONODRAUGHT LTD |
| SE CONTROLS |
| SENIOR HARGREAVES |
| TROX UK LTD |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENTILATION Condensation Traps | AIRFLOW DEVELOPMENTS LTD (DOMESTIC) |
| POLYPIPE VENTILATION |
| VENT AXIA DOMESTIC PRODUCTS |
| VENTILATION Continuous | AIRFLOW DEVELOPMENTS LTD (COMMERCIAL) |
| FLAKT WOODS LTD |
| ITHO UK LTD |
| PETER COX LTD |
| POLYPIPE VENTILATION |
| TROX UK LTD |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENTILATION Cooker Hood Kits | ITHO UK LTD |
| POLYPIPE VENTILATION |
| VENT AXIA DOMESTIC PRODUCTS |
| VENTILATION Cooling | AIRFLOW DEVELOPMENTS LTD (COMMERCIAL) |
| FLAKT WOODS LTD |
| TROX UK LTD |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENTILATION Cowls | AIRFLOW DEVELOPMENTS LTD (DOMESTIC) |
| BREWER METALCRAFT LTD |
| HUNTER PLASTICS LTD |
| ITHO UK LTD |
| POLYPIPE VENTILATION |
| TIMLOC BUILDING PRODUCTS |
| UBBINK WHOLE HOUSE VENTILATION |
| VECTAIRE LTD |
| VENT AXIA DOMESTIC PRODUCTS |
| VERPLAS LTD |
| VENTILATION Dampers | AIRVENT SYSTEMS LTD |
| COLT SMOKE CONTROL |
| FLAKT WOODS LTD |
| RUSKIN AIR MANAGEMENT LTD |
| SE CONTROLS |
| SENIOR HARGREAVES |
| TROX UK LTD |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENTILATION Dark Room (Powered) | VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENTILATION Decentralised | TROX UK LTD |
| VENTILATION Delayed Switch | AIRFLOW DEVELOPMENTS LTD (DOMESTIC) |
| FLAKT WOODS LTD |
| POLYPIPE VENTILATION |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENT AXIA DOMESTIC PRODUCTS |
| VENTILATION Diffusers | AIRFLOW DEVELOPMENTS LTD (COMMERCIAL) |
| FLAKT WOODS LTD |
| POLYPIPE VENTILATION |
| RUSKIN AIR MANAGEMENT LTD |
| SENIOR HARGREAVES |
| TROX UK LTD |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENTILATION Domestic | AIRFLOW DEVELOPMENTS LTD (DOMESTIC) |
| FLAKT WOODS LTD |
| Glow-worm |
| ITHO UK LTD |
| PETER COX LTD |
| POLYPIPE VENTILATION |
| REHAU RENEWABLE ENERGY |
| SCHUECO UK LTD |
| SENIOR HARGREAVES |
| SOVEREIGN CHEMICALS LTD |
| UBBINK WHOLE HOUSE VENTILATION |
| VAILLANT LTD |
| VECTAIRE LTD |
| VENT AXIA DOMESTIC PRODUCTS |
| VERPLAS LTD |
| ZEHNDER COMMERCIAL DIVISION |
| VENTILATION Downdraught | GAGGENAU UK LTD |
| VENTILATION Fans | AIRFLOW DEVELOPMENTS LTD (COMMERCIAL) |
| AIRFLOW DEVELOPMENTS LTD (DOMESTIC) |
| FLAKT WOODS LTD |
| ITHO UK LTD |
| PETER COX LTD |
| POLYPIPE VENTILATION |
| SE CONTROLS |
| SENIOR HARGREAVES |
| TROX UK LTD |
| UBBINK WHOLE HOUSE VENTILATION |
| VECTAIRE LTD |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENT AXIA DOMESTIC PRODUCTS |
| ZEHNDER RETAIL DIVISION |
| VENTILATION Fascia | CAVITY TRAYS LTD |
| GUTTERMASTER LTD |
| MANTHORPE GROUP |
| SWISH BUILDING PRODUCTS |
| TIMLOC BUILDING PRODUCTS |
| UBBINK ROOFING & BUILDING PRODUCTS |
| VENTILATION Fire Control | AIRVENT SYSTEMS LTD |
| COLT SMOKE CONTROL |
| FLAKT WOODS LTD |
| POLYPIPE VENTILATION |
| SE CONTROLS |
| SENIOR HARGREAVES |
| VENTILATION Fire Dampers | ASTROFLAME FIRESEALS LTD |
| COMPLETE FIRE PROTECTION LTD |
| LORIENT LTD |
| SE CONTROLS |
| SENIOR HARGREAVES |
| TROX UK LTD |
| VENTILATION Fittings | AIRFLOW DEVELOPMENTS LTD (DOMESTIC) |
| ITHO UK LTD |
| SE CONTROLS |
| SENIOR HARGREAVES |
| UBBINK WHOLE HOUSE VENTILATION |
| VECTAIRE LTD |
| VENT AXIA DOMESTIC PRODUCTS |
| VENTILATION Flat Roof | CAVITY TRAYS LTD |
| COLT CLIMATE CONTROL |
| ICOPAL LTD |
| KLOBER LTD |
| MANTHORPE GROUP |
| MONODRAUGHT LTD |
| SE CONTROLS |
| UBBINK ROOFING & BUILDING PRODUCTS |
| VENTILATION Grilles: | AIRFLOW DEVELOPMENTS LTD (DOMESTIC) |
| AIRVENT SYSTEMS LTD |
| AMP WIRE LTD |
| ASTROFLAME FIRESEALS LTD |
| CAVITY TRAYS LTD |
| CMS DANSKIN ACOUSTICS |
| COMPLETE FIRE PROTECTION LTD |
| ELEFANT GRATINGS LTD |
| FARMER BROS & JD BEARDMORE |
| FLAKT WOODS LTD |
| INTUMESCENT SYSTEMS LTD |
| ITHO UK LTD |
| NOBERNE SEALS |
| POLYPIPE VENTILATION |
| RUSKIN AIR MANAGEMENT LTD |
| SE CONTROLS |
| SENIOR HARGREAVES |
| SKIRMETT WASHROOMS |
| THE STEEL GRATING COMPANY (2006) LLP |
| TIMLOC BUILDING PRODUCTS |
| TROX UK LTD |
| UBBINK ROOFING & BUILDING PRODUCTS |
| UBBINK WHOLE HOUSE VENTILATION |
| VECTAIRE LTD |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENT AXIA DOMESTIC PRODUCTS |
| VERPLAS LTD |
| VENTILATION Heat Recovery | AIRFLOW DEVELOPMENTS LTD (DOMESTIC) |
| DIMPLEX RENEWABLE ENERGY |
| Glow-worm |
| ITHO UK LTD |
| POLYPIPE VENTILATION |
| REHAU RENEWABLE ENERGY |
| SENIOR HARGREAVES |
| UBBINK WHOLE HOUSE VENTILATION |
| VAILLANT LTD |
| VECTAIRE LTD |
| VENT AXIA DOMESTIC PRODUCTS |
| VIESSMANN LTD |
| VENTILATION Industrial | AIRFLOW DEVELOPMENTS LTD (COMMERCIAL) |
| COLT CLIMATE CONTROL |
| FLAKT WOODS LTD |
| SENIOR HARGREAVES |
| TROX UK LTD |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENTILATION Internal System (Powered) | AIRFLOW DEVELOPMENTS LTD (DOMESTIC) |
| ITHO UK LTD |
| PETER COX LTD |
| POLYPIPE VENTILATION |
| UBBINK WHOLE HOUSE VENTILATION |
| VECTAIRE LTD |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENT AXIA DOMESTIC PRODUCTS |
| VENTILATION Louvres: | ACOUSTIC APPLICATIONS LTD |
| AIRVENT SYSTEMS LTD |
| CAVITY TRAYS LTD |
| COLT CLIMATE CONTROL |
| COLT SMOKE CONTROL |
| HODGSON & HODGSON GROUP LTD |
| HUNTER DOUGLAS SUN CONTROL & FACADES |
| INDUSTRIAL ACOUSTICS CO LTD |
| KALZIP LTD |
| LB PLASTICS LTD |
| NATIONAL DOMELIGHT COMPANY |
| POLYPIPE VENTILATION |
| RATIONEL WINDOWS (UK) LTD |
| ROBUST UK LTD |
| RUSKIN AIR MANAGEMENT LTD |
| SAVEKERS SOLUTIONS LIMITED |
| SE CONTROLS |
| SENIOR HARGREAVES |
| TIMLOC BUILDING PRODUCTS |
| TROX UK LTD |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VERPLAS LTD |
| VENTILATION Low Pitch Roof | MANTHORPE GROUP |
| VENTILATION Manufacturing and Design | POLYPIPE VENTILATION |
| VENTILATION Mechanical | A1 BRIDGE FLUE SYSTEMS |
| AIRFLOW DEVELOPMENTS LTD (COMMERCIAL) |
| COLT CLIMATE CONTROL |
| DIMPLEX RENEWABLE ENERGY |
| FLAKT WOODS LTD |
| ITHO UK LTD |
| PETER COX LTD |
| POLYPIPE VENTILATION |
| SE CONTROLS |
| SENIOR HARGREAVES |
| TROX UK LTD |
| UBBINK WHOLE HOUSE VENTILATION |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENTILATION Multi-Room Systems | COLT CLIMATE CONTROL |
| FLAKT WOODS LTD |
| ITHO UK LTD |
| POLYPIPE VENTILATION |
| SENIOR HARGREAVES |
| TROX UK LTD |
| UBBINK WHOLE HOUSE VENTILATION |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENTILATION Natural | A1 BRIDGE FLUE SYSTEMS |
| AIRVENT SYSTEMS LTD |
| COLT CLIMATE CONTROL |
| COLT SMOKE CONTROL |
| FLAKT WOODS LTD |
| HUNTER DOUGLAS SUN CONTROL & FACADES |
| MONODRAUGHT LTD |
| NATIONAL DOMELIGHT COMPANY |
| POLYPIPE VENTILATION |
| RUSKIN AIR MANAGEMENT LTD |
| SAVEKERS SOLUTIONS LIMITED |
| SE CONTROLS |
| SVR PLASTICS LTD |
| SWISH BUILDING PRODUCTS |
| TROX UK LTD |
| UBBINK ROOFING & BUILDING PRODUCTS |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VERPLAS LTD |
| ZEHNDER COMMERCIAL DIVISION |
| VENTILATION Outlets | BREWER METALCRAFT LTD |
| CAVITY TRAYS LTD |
| FLAKT WOODS LTD |
| KLOBER LTD |
| POLYPIPE VENTILATION |
| SENIOR HARGREAVES |
| TIMLOC BUILDING PRODUCTS |
| TROX UK LTD |
| UBBINK ROOFING & BUILDING PRODUCTS |
| VERPLAS LTD |
| VENTILATION Outlets Air Terminals | FLAKT WOODS LTD |
| POLYPIPE VENTILATION |
| TIMLOC BUILDING PRODUCTS |
| TROX UK LTD |
| VERPLAS LTD |
| VENTILATION Over Fascia | CAVITY TRAYS LTD |
| CELUFORM LTD |
| MANTHORPE GROUP |
| MONIER REDLAND LTD |
| SANDTOFT ROOF TILES LTD |
| SWISH BUILDING PRODUCTS |
| TIMLOC BUILDING PRODUCTS |
| UBBINK ROOFING & BUILDING PRODUCTS |
| VENTILATION Passive Stack | AIRFLOW DEVELOPMENTS LTD (COMMERCIAL) |
| FLAKT WOODS LTD |
| MONODRAUGHT LTD |
| RUSKIN AIR MANAGEMENT LTD |
| SE CONTROLS |
| SENIOR HARGREAVES |
| UBBINK ROOFING & BUILDING PRODUCTS |
| UBBINK WHOLE HOUSE VENTILATION |
| VECTAIRE LTD |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENTILATION Permanent | HUNTER DOUGLAS SUN CONTROL & FACADES |
| MANTHORPE GROUP |
| MONODRAUGHT LTD |
| RUSKIN AIR MANAGEMENT LTD |
| UBBINK ROOFING & BUILDING PRODUCTS |
| VENTILATION Profiles | WESTERN EXPANDED METAL (WEMICO) |
| VENTILATION Registers | VERPLAS LTD |
| VENTILATION Remote Void | MANTHORPE GROUP |
| VENTILATION Roof and Wall | AIRFLOW DEVELOPMENTS LTD (DOMESTIC) |
| ITHO UK LTD |
| POLYPIPE VENTILATION |
| UBBINK ROOFING & BUILDING PRODUCTS |
| UBBINK WHOLE HOUSE VENTILATION |
| VECTAIRE LTD |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENT AXIA DOMESTIC PRODUCTS |
| VENTILATION Roof Slate/Tile | DREADNOUGHT TILES LTD |
| KLOBER LTD |
| MONODRAUGHT LTD |
| SANDTOFT ROOF TILES LTD |
| UBBINK ROOFING & BUILDING PRODUCTS |
| VENTILATION Roof Void | CAVITY TRAYS LTD |
| KLOBER LTD |
| ROCKPANEL GROUP |
| SWISH BUILDING PRODUCTS |
| TIMLOC BUILDING PRODUCTS |
| UBBINK ROOFING & BUILDING PRODUCTS |
| VENTILATION Safety Extra Low Voltage SELV | AIRFLOW DEVELOPMENTS LTD (DOMESTIC) |
| POLYPIPE VENTILATION |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENT AXIA DOMESTIC PRODUCTS |
| VENTILATION Silencers | ACOUSTIC APPLICATIONS LTD |
| INDUSTRIAL ACOUSTICS CO LTD |
| POLYPIPE VENTILATION |
| SENIOR HARGREAVES |
| TROX UK LTD |
| VENTILATION Smoke Control | AIRFLOW DEVELOPMENTS LTD (COMMERCIAL) |
| AIRVENT SYSTEMS LTD |
| BILCO UK LTD |
| COLT SMOKE CONTROL |
| FLAKT WOODS LTD |
| GEZE UK LTD |
| KALZIP LTD |
| NATIONAL DOMELIGHT COMPANY |
| RUSKIN AIR MANAGEMENT LTD |
| SE CONTROLS |
| SENIOR HARGREAVES |
| SURESPAN LTD |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENTILATION Smoke Extraction | AIRFLOW DEVELOPMENTS LTD (COMMERCIAL) |
| AIRVENT SYSTEMS LTD |
| COLT SMOKE CONTROL |
| FLAKT WOODS LTD |
| GEZE UK LTD |
| NATIONAL DOMELIGHT COMPANY |
| SE CONTROLS |
| SENIOR HARGREAVES |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENT AXIA DOMESTIC PRODUCTS |
| VENTILATION Soffits | CAVITY TRAYS LTD |
| CELUFORM LTD |
| HOLLYWATER FITTINGS LTD |
| KLOBER LTD |
| MANTHORPE GROUP |
| ROCKPANEL GROUP |
| SWISH BUILDING PRODUCTS |
| TIMLOC BUILDING PRODUCTS |
| UBBINK ROOFING & BUILDING PRODUCTS |
| VENTILATION Solar Powered | MONODRAUGHT LTD |
| VENTILATION Table Top | GAGGENAU UK LTD |
| VENTILATION Timber Framed Wall | MANTHORPE GROUP |
| VENTILATION Tower | STORMKING PLASTICS |
| VENTILATION Tumble Dryer Kits | POLYPIPE VENTILATION |
| VENTILATION Underfloor | CAVITY TRAYS LTD |
| MANTHORPE GROUP |
| SVR PLASTICS LTD |
| TIMLOC BUILDING PRODUCTS |
| VENTILATION Unit Maintenance | VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENTILATION Wall | CAVITY TRAYS LTD |
| RUSKIN AIR MANAGEMENT LTD |
| SE CONTROLS |
| TIMLOC BUILDING PRODUCTS |
| UBBINK ROOFING & BUILDING PRODUCTS |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VERPLAS LTD |
| ZEHNDER COMMERCIAL DIVISION |
| VENTILATION WC (Powered) | AIRFLOW DEVELOPMENTS LTD (DOMESTIC) |
| POLYPIPE VENTILATION |
| SENIOR HARGREAVES |
| VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
| VENT AXIA DOMESTIC PRODUCTS |
| VENTILATION Wind Powered Systems | MONODRAUGHT LTD |
| VENTILATION Window | GEZE UK LTD |
| POLYPIPE VENTILATION |
| SE CONTROLS |
| VENTILATION Window Kits | POLYPIPE VENTILATION |
| VENTILATION Wireless Controlled | VENT AXIA COMMERCIAL & INDUSTRIAL PRODUCTS |
