About Firmus Energy
Firmus Energy, originally a natural gas supplier, was awarded a licence to supply electricity in 2009. It therefore became the first Northern Irish supplier to offer dual-fuel energy contracts. It now supplies over 70,000 homes and business in the region. Firmus Energy is a subsidiary of Ervia, previously known as Bord Gáis, the Irish Gas Board.
Since Which? Switch is unable to switch customers in Northern Ireland, you will not be able to compare Firmus Energy tariffs on this site.
Customer service for existing customers: 0800 032 4567
New customers: 0800 032 4567
Contact Which? Switch by phone
You can call us on 0800 410 1149 or 01259 220 235.
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