Abacus Direct LimitedAbacus House, Jubilee Court Copgrove HG3 3TBAdey Professional Heating SolutionsGloucester Road Cheltenham GL51 8RNBaxi Heating UK Ltd t/a Heatrae Sadia HeatingHurricane Way Norwich NR6 6EABosch Thermotechnology Ltd.Cotswold Way,Warndon Worcester WR4 9SWBrett Martin Building Products LtdSpeedwell Industrial Estate, Stephenson Road, Staveley Chesterfield S43 3JPDanfoss Randall LtdAmpthill Road Bedford MK42 9ERFirebird UKEast Central House, Central Avenue, Lee Mill Industrial Est, Nr Ivybridge PL21 9PEHoneywell Control Systems LtdHoneywell House, Arlington Business Park Bracknell RG12 1EBHydro International UK LtdShearwater House, Clevedon Hall Estate Clevedon BS21 7RDIMI Hydronic Engineering Ltd3 Nimbus Park, Porz Avenue Dunstable LU5 5WZIvar (UK) Ltd.Unit 3 North Ridge Park, Haywood Way Hastings TN35 4PPKME Yorkshire LimitedEast Lancashire Road, Kirkby Liverpool L33 7TUMueller Europe LimitedOxford Street Bilston WV14 7DSO H LimitedPO Box 1012, Great Shelford Cambridge CB22 5WRPegler YorkshireSt. Catherine's Avenue Doncaster DN4 8DFRettig UKRettig Park, Drum Lane Birtley DH2 1ABRoca LimitedRoca Limited, Samson Road, Hermitage Industrial Estatte Coalville LE67 3FPSmith's Environmental Products LtdBlackall Industrial Estate, South Woodham Ferrers Chelmsford CM3 5UWUbbink UK LtdUnit 33 Liliput Road, Brackmills Industrial Estate Northampton NN4 7DTVELUX Company LtdWoodside Way Glenrothes KY7 4NDWarmup Plc702 Tudor Estate, Abbey Road NW10 7UWWestco Flow Control LimitedUnit C6 William Way, Moss Industrial Estate, St. Helens Road Leigh WN7 3PT