- Are you a certified gas technician, licensed by the CSA?
- Do you carry liability insurance that adequately protects me, when you are working in my home?
- Are you a TSSA licensed contractor? (a quick call to the TSSA can easily verify the info as well)
Cheapest is not best, especially when it comes to your safety. Professional licensed contractors pay hefty fees, insurance premiums, and are audited regularly by the TSSA to maintain their accreditations. They are continuously brought up to date when gas code changes, and regularly attend training to stay current in their field. Gas work is specialized work. The story below emphasizes the importance of hiring only licensed technicians:
http://www.tssa.org/CorpLibrary/ArticleFile.asp?Instance=136&ID=E088979C509711E3A788000C2922855A