Bilt Hamber Interior Products. air con bomb CITRUS provides a fast and effective way to sanitise and deodorise vehicle interiors. Air-conditioning systems draw external air into the air cooling system, yet despite the existence of filters, spores, organic and inorganic matter find their way into the ducts, tubes and ventilators that combine to supply treated air to the passenger compartments. Due to the rapid cooling that occurs when the air-conditioning is employed condensation forms on the interior surfaces of the air distribution system providing an environment that will support the growth of bacteria, fungi and moulds. These can contribute to unpleasant odours within the vehicle along with, as one example, spores liberated from the growing organisms, which can contribute to asthma and other respiratory conditions.