250-450degF
150-250degC
You will be losing some heat up the flue, but in order to prevent tar/condensates forming you need to accept a certain amount of losses keeping the flue gas temp up.
quote:
115 °C – 245°C (240°F – 475°F)
The flue gases should be in this temperature band for the safest, most efficient and most economical operation of your stove.
Below 115°C (240°F)
This is below the condensation point of wood gases and may cause the build up of tar in the chimney, darken the stove glass and result in the inefficient burning of fuel.
Above 245 °C (475°F)
Too hot. Heat will be wasted up the chimney. Excess heat may damage the stove (voiding the warranty) or may ignite an existing accumulation of tar, resulting in a chimney fire.
http://greymetal.co.uk/operation.php