- P.J Bevan
- 01874 625010 - Tynewydd The Watton, Brecon, Powys, LD3 7EP
- Central Heating House
- 0870 8148359 - Pen Y Pentre, Llanfihangel Talyllyn, Brecon, Powys, LD3 7TG
- Beacon Stoves
- 01559 371058 - Parc Gwair, Capel Iwan, Newcastle Emlyn, Dyfed, SA38 9LS
- D.A.R
- 01570 423376 - Teifi Stores, Cwmann, Lampeter, Dyfed, SA48 8JN
- Aberystwyth Automotive Services
- 01970 615830 - Unit 3, Glan Yr Afon Industrial Estate, Aberystwyth, Dyfed, SY23 3JQ
- Aberystwyth Boiler Maintenance
- 01970 617850 - Gwernllwyn Piercefield La, Penparcau, Aberystwyth, Dyfed, SY23 1RX
- Aberystwyth Gas Supplies
- 01970 611622 - 51 Cambrian Street, Aberystwyth, Dyfed, SY23 1NZ
- B M J Plumbing & Heating
- 01686 411121 - Abernant Troed-y-Garth, Van, Llanidloes, Powys, SY18 6NA
- Benson Heating
- 0845 3736639 - Ludlow Road, Knighton, Powys, LD7 1LP
- P Carruthers
- 01974 821456 - Plas Newydd, Llangeitho, Tregaron, Dyfed, SY25 6QG
- L Church
- 01650 521482 - Glan Yr Afon, Mallwyd, Machynlleth, Powys, SY20 9HS
- K Davies
- 01547 528642 - Cefncoch Heyope, Heyope, Knighton, Powys, LD7 1PU
- Edwards & Owen
- 01970 612611 - Glanrhyd, Llanfarian, Aberystwyth, Dyfed, SY23 4UG
- N.J Evans
- 01938 552976 - 1/2 Jehu Road, Welshpool, Powys, SY21 7PE
- N.J.R Jones
- 01686 411066 - 30 Gilfach Uchaf Gorn Rd, Llanidloes, Powys, SY18 6ED
- M.S.P. Gas Services
- 01686 688781 - 30 Llys Rhufain, Llangurig, SY17 5HY
- Mid Wales Gas Services
- 01654 710879 - Ffynnon Wells Rd, Tywyn, Gwynedd, LL36 9BT
- Powys Gas Services
- 01686 627699 - Pentre Farm Mochdre, Mochdre, Newtown, Powys, SY16 4JP
- P.A White
- 01970 611798 - 10 Glyndwr Road, Aberystwyth, Dyfed, SY23 1PW
- Hounslow Plumbing And Heating
- 01974 241645 - Murmur Y Nant, Llanilar, Aberystwyth, Dyfed, SY23 4PG
- D E E Services
- 01686 688025 - 10 Ael Y Bryn, Llandinam, Powys, SY17 5BT
- Very Efficient Heating Company, The
- 01654 700324 - Old Stn Heol Y Doll, SY20 8BL
- Aber Heating Engineers
- 01970 625597 - Unit 3 Minllyn Glanyrafon Industrial Estate, Aberystwyth, Ceredigion, SY23 3JQ
- Chris Bradshaw Plumbing and Heating Engineer
- 0845 8324784 - 4 Morfa Crescent Tywyn, Aberystwyth
- Lee Brown Plumbing and Heating
- 0845 2919848 - Loth Lorien Step A Side Mochdre, Powys
- Mr Oleh Krawec
- 0845 6836412 - 28 Glanrafon Terrace Trefechan, Aberystwyth, SY23 1BY
- MLB Plumbing and Heating
- 07774 233509 - 7 George Close The CWM, Knighton, Powys, LD7 1HL
- Martyn O'connor & Co
- 01239 613423 - Tirowen, Llangoedmor, Cardigan, SA43 2LB