- Bishopton Engineering Services
- 0141 8872226 - Greenlaw Indust Est Wallneuk Rd, Paisley, Renfrewshire, PA3 4BT
- Bullwood Mechanical Services
- 0141 8830707 - 2 Ossian Avenue, Paisley, Renfrewshire, PA1 3AY
- G W E Maintenance
- 0141 5610029 - Studio, 17 Abbey Mill Business Centre, Paisley, Renfrewshire, PA1 1TJ
- Gas Man, The
- 0141 4342652 - 962 Crow Rd Nth, Glasgow, G13 1JF
- Harper Gas Services
- 01505 340344 - 18 Craighead Road, Bishopton, Renfrewshire, PA7 5DT
- Hi-Flow Heating & Plumbing Ltd
- 0141 9512020 - 9 Caledonia Street, Clydebank, Dunbartonshire, G81 4EX
- Hi-Flow Heating & Plumbing
- 0141 9446060 - 37 Duntreath Gardens, Glasgow, G15 6SH
- Independent Quality Assurance
- 0141 8405256 - 101 Abercorn St, Paisley, Renfrewshire, PA3 4AT
- Mackay Heating Services
- 0141 8838273 - 10 Staybrae Grove, Glasgow, G53 7SU
- Mitsui Babcock Energy
- 0141 8864141 - Porterfield Road, Renfrew, Renfrewshire, PA4 8DJ
- Reid Underfloor Heating (scotland) Ltd
- 0141 8804443 - 8 Hillside Grove, Glasgow, East Renfrewshire, G78 1HB
- S.J.M Plumbing & Heating
- 0141 8896787 - St. Annes Linwood Rd, Paisley, Renfrewshire, PA1 2TL
- Taylor & Fraser Ltd
- 0141 8876151 - 117 Abercorn Street, Paisley, Renfrewshire, PA3 4DH
- Uni-Heat
- 0141 8861028 - Unit 7, Station Crescent, Renfrew, Renfrewshire, PA4 8RA
- Alternagas
- 01389 726797 - 9 Castle Street, Dumbarton, Dunbartonshire, G82 1QS
- J.M Brown
- 01389 841120 - Villafield Main Rd, Cardross, Dumbarton, Dunbartonshire, G82 5PX
- Heating & Replacement Parts & Controls
- Birch Road, Broadmeadow Industrial Estate, Dumbarton, Dunbartonshire, G82 2RE
- Ramage & Finnigan
- 01389 767802 - 34 Round Riding Road, Dumbarton, Dunbartonshire, G82 2HA
- J & M Plumbing & Heating Contractors
- 0141 8121763 - 3 Broompark Drive, Inchinnan, Renfrew, Renfrewshire, PA4 9QF
- Gastex
- 0141 8844208 - 39 Braids Crcl, Paisley, PA2 6HS
- Alba Gas Services Ltd.
- 0141 5614610 - 74 Fauldshead Rd., Renfrew, Scotland, PA4 0RU
- Advanced Affordable Heating and Plumbing
- 0845 8324620 - 544 Ritchie Park, Johnstone, Renfrewshire
- Joseph Crerand
- 0845 8063779 - 18 Fleet Avenue, Deanfield, Renfrew, PA4 0YT
- William Thomson
- 07888 687684 - 49 McConnell Road, Lochwinnoch, PA12 4EB