 A series of long, narrow, high level, arched windows punctuate its northern and southern elevations and contain fixed, nine pane, steel framed windows glazed with randomly set yellow, blue, green and uncoloured obscure glass.Located beneath these windows and of equal width are a series of square, recessed, hit-and-miss brick ventilation panels that reveal the symbol of the cross in their patterning.These baffled ventilation panels, similarly expressed on the interior in metal, are part of the church's passive cooling system, allowing air to be drawn into the church.