There are 2 dials. "Auto-set Control" sets the amount of heat 'charge' that is stored when the heater is heating overnight. "Output control" sets the rate at which heat is allowed out from the heater. These are reasonable heaters so retain their heat charge well through the day. If you've not used them before, start with the Auto-set Control at about 4 and the Output control on 2. Remember that if you have a low setting for the Auto-set Control it will have only a small heat charge and that can be used up quickly. It's very inefficient to have a high value for the Auto-set Control and a very low value for the Output Control. I tend to have the Ouptut Control 1-2 lower than the Auto-set Control.
Kakapo the Parrot, January 2009
