The former Boyzone singer, who released Fires earlier this week, insisted that physical sales are traditionally low in his home country.
© PA Images / Jonathan Short/AP
"It's rubbish. The number one album midweek here sold about 700 - it's not like sales for anything are sky high," he told Strawberry Alarm Clock on FM104.
"Album sales in Ireland are never going to keep you in Gucci - you do it to make a presence.
"They didn't include my download sales either and the downloads were quite substantially more than that but I'm not going to get into a battle about it."
He added: "Hopefully I'll be top three in the UK. When I saw what was written here in Ireland I was like, 'What the hell?' I mean, it's number four in the UK midweek charts already."
Keating concluded by saying that he "couldn't be happier" with Fires.
Watch Ronan Keating's video for 'Fires' below:
