A Centereach family was rushed to the hospital early Monday morning after their home became filled with carbon monoxide during the night.

The LoMastros say their youngest daughter woke up around 4 a.m. vomiting and then one by one each family member began to show symptoms such as lightheadedness, nausea and disorientation. The couple?s 12-year-old son Joey passed out from the gas, suffering the worst levels of poisoning.

Andrew LoMastro says he, his wife Susan and their three children are lucky to be alive. He says he is not sure what went wrong because the home?s gas furnace was recently checked. LoMastro also says their carbon monoxide detector was not working.

The family was taken to Mather Hospital in Port Jefferson and put into hyperbaric chambers to pump oxygen back into the bloodstream. Joey LoMastro is recovering.

"Make sure all your detectors and alarms are working, because we are lucky to be alive, all five of us,? Andrew LoMastro says. ?I look at them now and I?m so grateful that we are here together today.?

Assistant Selden Fire Chief John Cronin says he isn't exactly sure what led to the carbon monoxide leak but thinks the flute pipe attached to the LoMastro's gas furnace may have been clogged.

Click for more on how to prevent a carbon monoxide leak

To see an extended interview with Assistant Fire Chief Cronin, go to Channel 612 on your iO digital cable box and select iO Extra.