A dynamic model of a room with a hot water baseboard heater is developed. In the modelling methodology used, a typical finned-tube baseboard heater with its cover was divided into several control volumes. The mass, energy balance and momentum equations were formulated and solved for each control volume. The dynamic model was used to study the effect of important design and operating parameters on the heat output rate of the baseboard heater. Simulation runs showing the dynamic responses of airflow rates, air temperature from the heater, and hot water temperature are presented. Copyright (c) 2005 John Wiley & Sons, Ltd.