We have the combination 3 burner cook top and oven. The oven is vented in the back of the enameled steel cover through slots. It will heat the space nicely, but do not even think for a minute about using it as a heater. The furnace
has all kinds of safeguards built in, but the oven does not, because it is intended to be used with you attending to it and only for a limited amount of time.