Former Fine Gael minister Michael Ring has hit out at what he described as the "poor" ventilation at the temporary Dail venue in the Dublin Convention Centre.
Mr Ring, who was dropped from Cabinet last month, said it was "completely unsatisfactory arrangement", claiming there "is very poor ventilation, which in my opinion is not a healthy environment".
The Dail and Seanad have sat at the Convention Centre on a number of occasions recently - at an estimated cost of €25,000 a day - in order to comply with social distancing during some votes.
The Government is looking to end the use of the centre amid growing unrest among TDs.
Responding to the criticism, chief executive Stephen Meehan said the Convention Centre uses a fresh air ventilation system, which draws on air from outside the building.
"It is a great way to ensure you are not recycling air," he said.
"Our business is to look after people and the quality of the experience we offer is really important to us."
Mr Meehan said the Oireachtas had told venue management it is "delighted" with the facilities at the Convention Centre.