A device (1) for producing an aerosol from vaporisable constituents of herbal matter, for example, tobacco, comprises a vaporising chamber (24) within which the herbal matter is placed. The vaporising chamber (24) is formed in a main housing (9) within which a combustion chamber (18) is also formed. A gas catalytic combustion element (19) is located in the combustion chamber (18) for converting fuel gas to heat to heat the main housing (9). The main housing (9) comprises a primary partition wall (28) and a primary side wall (25) extending around the primary partition wall (28) which form a socket portion (20) of the vaporising chamber (24). A hollow plug portion (22) comprising a secondary side wall (30) extending around an end cap (31) is releasably engageable in the socket portion (20) to form the vaporising chamber (24). A heat transfer member (46) extends from the primary partition wall (28) into the vaporising chamber (24) for heating the herbal matter in the vaporising chamber (24). The aerosol is drawn from the vaporising chamber (24) through an aerosol accommodating tube (37).
