Maintaining My Home

turn off the roof space ventilation unit to stop the airflow. A system that draws in roof space air will only provide warm air during the daytime when the sun has been shining. On overcast days and at night the roof space air temperature may be colder than the room air temperature. New Zealand research into ventilation systems that use roof space air found that: “The majority of the time, it was calculated that pumping air from the roof space into the house…would often actually act to push the internal temperature further away from the desired level rather than closer to it.”