- P.J Bevan
- 01874 625010 - Tynewydd The Watton, Brecon, Powys, LD3 7EP
- Central Heating House
- 0800 515459 - Pen Y Pentre, Llanfihangel Talyllyn, Brecon, Powys, LD3 7TG
- B M J Plumbing & Heating
- 01686 411121 - Abernant Troed-y-Garth, Van, Llanidloes, Powys, SY18 6NA
- Benson Heating
- 01547 529245 - Ludlow Road, Knighton, Powys, LD7 1LP
- L Church
- 01650 521482 - Glan Yr Afon, Mallwyd, Machynlleth, Powys, SY20 9HS
- K Davies
- 01547 528642 - Cefncoch Heyope, Heyope, Knighton, Powys, LD7 1PU
- 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
- Powys Gas Services
- 01686 627699 - Pentre Farm Mochdre, Mochdre, Newtown, Powys, SY16 4JP
- 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
- Lee Brown Plumbing and Heating
- 0845 2919848 - Loth Lorien Step A Side Mochdre, Powys
- MLB Plumbing and Heating
- 07774 233509 - 7 George Close The CWM, Knighton, Powys, LD7 1HL
- Wye Solar
- 0845 1366912 - Archer Cottage Archenfield, HEREFORD, HR3 5TB
- Brecon Gas
- 0845 3479633 - Seelie Court Ashfield Place, Brecon, LD3 8EG