A gas heater for a surgical gas delivery system is disclosed, which includes an elongated tubular body defining an interior flow passage having an inlet port for receiving insufflation gas from a gas source and an outlet port for delivering heated insufflation gas to an insufflation manifold, a dielectric support positioned within the interior flow passage of the tubular body, and a resistive element operatively associated with the dielectric support for heating insufflation gas flowing through the tubular body from the inlet port to the outlet port.