An apparatus for studying aerosol, comprising: a test chamber comprising one or more panels defining an enclosed interior volume , each of the one or more panels having a first wall having a surface defining an interior of the test chamber and having a second wall defining an exterior of the test chamber , wherein a void space is defined between the first and second walls , wherein each of the panels comprises a panel inlet in communication with the void space and a panel outlet in communication with the void space , wherein air flowed through the void space has a temperature greater than the temperature in the enclosed interior volume of the test chamber ; a frame configured to retain the one or more panels , wherein one or both of the panel inlet and the panel outlet are defined through the frame ; a chamber inlet port extending through one of the one or more panels and defining an air inlet conduit in communication with the enclosed interior volume of the test chamber ; a chamber outlet port extending though one of the one or more panels and defining an air outlet conduit in communication with the enclosed interior volume of the test chamber ; a fan disposed in the enclosed interior volume of the test chamber , the fan positioned and configured to mix air in the enclosed interior volume ; and a trap port for sampling contents from the enclosed interior volume , the trap port extending through one of the one or more panels and comprising a valve to permit sampling of the contents in the enclosed interior volume . a test chamber comprising one or more panels defining an enclosed interior volume , each of the one or more panels having a first wall having a surface defining an interior of the test chamber and having a second wall defining an exterior of the test chamber , wherein a void space is defined between the first and second walls , wherein each of the panels comprises a panel inlet in communication with the void space and a panel outlet in communication with the void space , wherein air flowed through the void space has a temperature greater than the temperature in the enclosed interior volume of the test chamber ; each of the one or more panels having a first wall having a surface defining an interior of the test chamber and having a second wall defining an exterior of the test chamber , wherein a void space is defined between the first and second walls , wherein each of the panels comprises a panel inlet in communication with the void space and a panel outlet in communication with the void space , wherein air flowed through the void space has a temperature greater than the temperature in the enclosed interior volume of the test chamber ; a frame configured to retain the one or more panels , wherein one or both of the panel inlet and the panel outlet are defined through the frame ; a chamber inlet port extending through one of the one or more panels and defining an air inlet conduit in communication with the enclosed interior volume of the test chamber ; a chamber outlet port extending though one of the one or more panels and defining an air outlet conduit in communication with the enclosed interior volume of the test chamber ; a fan disposed in the enclosed interior volume of the test chamber , the fan positioned and configured to mix air in the enclosed interior volume ; and a trap port for sampling contents from the enclosed interior volume , the trap port extending through one of the one or more panels and comprising a valve to permit sampling of the contents in the enclosed interior volume . <EOS>