Our true convection heating technology provides on-demand vaping and on first use takes around 5 seconds to preheat before you are able to start vaping. During a session, subsequent draws are much faster as the heat exchanger and air passing through the device pre-heat even quicker. The length of pre-heat is determined by the selected temperature, meaning the higher you go, the longer the pre-heat, but at a maximum we would not expect you to have to wait longer than 10 seconds for your first vape