The objectives of the work were : 1) To reduce curing costs by improved efficiency; 2) To provide an environmentally acceptable and economical fuel; 3) to improve the quality of the cured product; 4) To improve ease of management. The kerosene burners and flues were removed from an 8 metre square by 7 tier conventional stick barn and a gas fired furnace and fan unit as used in a standard bulk barn substituted. A vertical duct allowed recirculation of the air within the barn, while an inlet duct into the forced ventilation allowed accurate control of the relative humidity. Direct combustion of the gas into the recirculatory system maximised efficient use of the fuel and allowed automatic temperature control. The single aperture inlet ventilation eased management and, while under manual control in the prototype, proved that automatic control of humidity by monitoring the wet bulb temperature is feasible. The conversion is both technically and economically advantageous.