above angles appearance building capping cover covered covering edge exhaust-pipes exterior external grooved grooves height high roof roof-area roof-capping roof-whirlybird roofing rooftop shapes sky sunlight sunshine textures tiles tiling turbine-ventilator vent ventilation ventilation-exhaust-pipes ventilation-system ventilator vents whirlybird whirlybirds wind-turbine air air condition airation clima cool hot support vending vending machine ventilation system architectural attached attachments colored colors coloured colours dark edges edging elements light lines perspectives protection protective ridges rows shadows surface surfaces antenna communication concave dish electrical-signals electromagnetic feedhorn parabolic parabolic-reflector radio-waves round satellite-dish technology television ventilate angle corrugated corrugations exhaust pipes metal safety security shopping centre shops ventilation exhaust pipes abstract grate perforations wall burn chimney clay fire isolated smoke ancient brick bricks house Italy old Siena Teracotta ventilated