Residential Smoothline Roof Ventilators Brisbane Queenslander Smoothline Roof Ventilators were installed in a Brisbane weatherboard house in March 2009. The owners wanted to increase the level of comfort within their elevated, single level, 1920s house. At that time, the house had no roof ventilation or insulation. Figure 1 Queenslander with Smoothline Roof Ventilators The problem: During the summer of 2008/2009, the temperature inside the house was often unbearably hot. The occupants would escape to cooler,…