- A.F.G Engineering
- Cambrian Bldgs Canal Road, Cwmbach, Aberdare, Vale Of Glamorgan, CF44 0AE
- All Fuels Maintenance
- 23 Heol-y-Glyn, Treharris, Vale Of Glamorgan, CF46 5RX
- Avondale Heating
- 15 Avondale Court, Porth, Vale Of Glamorgan, CF39 9NH
- Bedford Engineering Services
- Blanche Ho Cross Blanche St, Dowlais, Merthyr Tydfil, Vale Of Glamorgan, CF48 3PD
- CLI Heating
- Unit 56, Bowen Industrial Estate, Aberbargoed, Bargoed, Vale Of Glamorgan, CF81 9EP
- Domestic Appliance Centre
- 14-15 Pontmorlais, Merthyr Tydfil, Vale Of Glamorgan, CF47 8UB
- David A Drew
- 17 Francis Street, Dowlais, Merthyr Tydfil, Vale Of Glamorgan, CF48 3SE
- Excelsior Homecare
- Unit 38, Rassau Industrial Estate, Rassau, Ebbw Vale, Gwent, NP23 5SD
- Gap Plumbing & Heating Services
- 85 Pwll Yr Allt, Tir-y-Berth, Hengoed, Vale Of Glamorgan, CF82 8FR
- Gareth Lane Plumbing & Heating
- 16 Bryn Terrace, Ystrad, Pentre, Vale Of Glamorgan, CF41 7RX
- Gasco Pontypridd
- 1 Whiterock Close, Pontypridd, Vale Of Glamorgan, CF37 2EN
- W.P Kelland
- 24 The Oaks, Quakers Yard, Treharris, Vale Of Glamorgan, CF46 5HQ
- W Lewis
- 16 Rhondda Fechan Fm Est, Ferndale, Vale Of Glamorgan, CF43 4LX
- A.J Lovell
- 13 Park Crescent, Bargoed, Vale Of Glamorgan, CF81 8PL
- J.C Matthews
- Glynmarch Street, Deri, Bargoed, Vale Of Glamorgan, CF81 9HZ
- Real Fires
- Nile Road, Pontypridd, Vale Of Glamorgan, CF37 1BW
- Wynne Rudge
- The Laurels Aberbargoed, Aberbargoed, Bargoed, Vale Of Glamorgan, CF81 9BX
- Sellitasitis.co.uk
- Unit 3, Pant Industrial Estate, Dowlais, Merthyr Tydfil, Vale Of Glamorgan, CF48 2SR
- Technigas Services
- 234 King Street, Brynmawr, Ebbw Vale, Gwent, NP23 4RG
- Valley Heating Ltd
- 22 Hanbury Road, Bargoed, Vale Of Glamorgan, CF81 8QT
- J.A Woods
- 16 Station Road, Ynyshir, Porth, Vale Of Glamorgan, CF39 0HA
- Ian Wright
- 34 Fife Street, Abercynon, Mountain Ash, Vale Of Glamorgan, CF45 4TU
- Garry Williams Gas Service Engineer
- 22 Maes-Deri, Aberdare
- D.jones
- 49, Llys Cynon, Hirwaun, Aberdare, CF44 9PR
- Aquacare
- 30 The Triangle, Mountain Ash, Mid Glam, CF45 4BA
- Graft Heating Solutions
- 6 Winifred St Dowlais, Merthyr Tydfil, Mid Glam, CF48 3SD