Description of ventilation shutters of smoke and heat exhaust – type CARBOHEAT CO2 and ARCHHEAT CO2. Products CARBOHEAT CO2 (type CARBOHEAT CO2/R, CARBOHEAT CO2/R) and ARCHHEAT CO2 (type ARCHHEAT CO2/A, ARCHHEAT CO2/A) are certified according to ČSN EN 12 101-2 and products are indicated by mark of agreement CE.