- Houston Plumbing & Heating
- 01436 676369 - Helensburgh, Garelochhead, Helensburgh, Dunbartonshire, G84 0AB
- INVEST Inverclyde Energy Saving Team
- 01475 728635 - Lynedoch Indust Est Dellingburn St, Greenock, Renfrewshire, PA15 4TW
- D Nicolson
- 01301 702400 - Callanish Ho, Arrochar, Dunbartonshire, G83 7AA
- Quality Gas Services (Gourock)
- 0870 8148359 - 9 Gleneagles Drive, Gourock, Renfrewshire, PA19 1HX
- West Coast Gas Services
- 0845 3736600 - 9 Sandhaven Place, Inverkip, Greenock, Renfrewshire, PA16 0FE
- Robert Snodgrass Heating and Plumbing
- 0845 8063515 - The Gardens Aileymill Aileymill Gardens Greenock, Greenock, Refrewshire, PA16 0QE
- Scotgas Services
- 07546 501232 - 2 Fearnan Place, Greenock, Inverclyde, PA16 9LZ