During the inspection, GD technicians found that there was only one return for the whole house. It was set in the hall of the second floor, but not in any of the bedrooms. Which is why an air exchange per room was minimal in both bedrooms. During the day hallway return pulled air from the bedrooms, but at night, with the doors closed, air could not circulate properly but inflated the room with already used air. The pressure in the room increased. We led an additional duct into each of the bedrooms and set a return system.