Demand for gas was up 15% in August.
Gas generation has provided up to 82 percent of electricity to the grid at times this year.
However Gas Networks Ireland says the extended closure of two plants has lead to Coal and Oil burning filling the gap.
Demand for gas to offices rose by 15 percent in August, compared to the previous month.
Gas Networks Ireland expects a further rise in demand as temperatures drop.

Average Price Of Property In Kildare Now Second-Most Expensive Outside Of Dublin
Issue Of Illegal Encampments On Curragh Raised In Seanad
Leixlip Woman Who Donated Kidney To Son Speaks Ahead Of Donor Awareness Week
Dog Fouling and Litter Fines To Jump To €250 From September
Bertie Ahern's Comments On Immigration 'Not Reflective Of Those In Fianna Fáil', Says Taoiseach
Oireachtas Media Committee Won't Recommend Social Media Ban For Under 16s
Eurovision Song Contest Begins Tonight As Ireland And Other Countries Boycott
Some Chicken Products Recalled From Lidl Due To Salmonella Presence