Published Tuesday, 10 September 2013
Firmus has announced a 14.4% increase in gas prices. (© Getty)
The company said the near 15% increase will affect around 20,000 customers.
An unseasonably cold March, a busy summer period and unrest in the Middle East, the company said, have seen wholesale gas prices almost double.
The tariff change will be introduced on October 1 and Firmus said the rise would equate to around £1 per week for a typical household.
Areas affected include Antrim, Templepatrick, Ballyclare, Armagh, Tandragee, Ballymena, Broughshane, Ballymoney, Banbridge, Coleraine, Bushmills, Portstewart, Craigavon, Moira, Lurgan, Portadown, Limavady, Londonderry, Newry, Bessbrook and Warrenpoint.
Michael Scott, general manager of Firmus Energy said: "We understand the importance of price stability for customers and for the past two years we have been able to absorb fluctuations in costs and wholesale energy prices.
"We appreciate that any increase in price is not good news for customers and it is with regret that we are increasing our tariffs at this time.
"Firmus Energy is committed to providing the lowest possible energy cost to customers and we are pleased that our gas price is one of the lowest in western Europe.
It is testament to the skill and experience of our dedicated trading team that this is just the third time that we have had to change our tariffs in almost eight years."
He added: "The cost of oil fluctuates daily and many home heating oil users will be familiar with the volatility in the price of a fill.
"Oil has been consistently more expensive than natural gas and even with this increase, Firmus Energy natural gas prices will still be around 20% cheaper compared to the average price of home heating oil over the last 12 months."
Prices for the energy provider's 40,000 customers in the Belfast area remain unchanged.
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