The 18 foot standard model has five large windows (1000 x 600 mm) . The 18 foot long bed model has five windows, of which 4 large (1000 x 600 mm) and one slightly smaller (820 x 500 mm). Two roof hatches (650 x 400 mm) enable excellent natural ventilation. The windows can be opened to any position. Stale air can flow upwards easily without being blocked by the windows. Ventilation during rain showers and safety at night is also possible due to the secure locking in the outer position of the frame.Natural ventilation
Successive insulation chambers inside the frame provide maximise heat insulation. The windows and roofhatches are double glazed with a special thermal coating and a gas-filled airspace is in place to minimise heat loss. Integrated roller blinds keep radiant energy out.
In addition to the windows and roof hatches two solar operated permanently activated inlet fans ensure the flow of fresh air throughout the Bliss Mobil's interior.