Abstract: A device for thawing and warming solutions and biological fluids intended for perfusions or intravenous administration contained in sealed bags comprising a cabinet, tray mounted at the top of the cabinet for holding the bags to be thawed and/or warmed, air channels, forming a raised rim around the tray cover and communicating with the interior of the cabinet, a plurality of apertures horizontally disposed in the air channels and above the tray substantially surrounding the tray and communicating with the interior of the air channels. Air heating and impeller, a temperature sensing device, and controller device mounted in the cabinet; a plenum communicating with the air heating and impeller device for receiving the heated air, outlets in the plenum disposed in such manner as to discharge the heated air over the tray containing the bags and be taken in through the apertures in the air channel for recirculation.