Concept Air close coupled bowl / back-to wall with Aquablade technology and isovalve access hole – horizontal outlet/ Concept Air Back to Wall BidetProduct Details Company Name Ideal Standard International NV Brand Name Concept Air Model Number E079901 / E080101 Maximum Volume 4.5 litres Category WC Suites Available In United Kingdom Efficiency Rating ChartCompany name:Ideal Standard International NVModel:E079901 / E080101 4.5 litres www.uwla.eu The average flushing volume for dual flush WC Suites and Cisterns is calculated as (a + (3 × b)) ÷ 4, where a is the full flush value and b is the low flush value.