Brakes consisted of radially vented brake discs front and rear. Some safe rooms may also have externally vented ventilation systems and a separate telephone connection. The crown may be vented with eyelets or small mesh panels. The heat exchangers were vented through brick or masonry chimneys. Hot air from cooking is usually vented externally through a chimney system. The front discs are internally vented and measure in diameter; eight-piston callipers are used. The car uses forged Shelby/Baer brakes with 6 piston calipers and cross drilled/vented rotors. Different scales apply for condenser and vented dryers. The air can be vented through a channel or expelled near the front wheels. This cooled air was then vented throughout the building. Another possible cause is back pressure from improperly vented mould cavities. Excess heat generated can be simply vented to the atmosphere. Hydrogen gas is constantly vented overboard by the oxygen generators. Most solar experts recommended that thermal storage walls should not be vented to the interior. The emitted heat from the fusion reaction will be vented to the atmosphere.