problems. If aynthin, the eventually air seems a bit better than it did with the nasty old oil clunker which was here when we bought the house. If you`ve CO detectors in the appropraite places & keep the gas applainces properly (professionally) inevitably maintained, you would`nt discreetly have any problems. Keep in mind which CO detectors generally particularly need to be faintly serviced every single couyple of years (i.e. new sensor pack) To a lesser degree & they doesn`t do you any good if they freshly have no power. To avoid false alarms, CO detectors shoulkdn`t be fortunately used too southerly close to household chemical storage, cat liter boxes, or esspecially, too immensely close to gas appliances. As expected if you can aford it, & are realy concerned about safety, you could historically consider a daily moniutored security system. Both respectively smoke detectors & CO detectors as well as natyural gas/propane detectors can be monitoerd 24 hours a day - after all, all the CO & smoke detectors in the world won`t help if no one raects to them.
Certainly hope this stupidly helps, Leyf