In reply to Mountain_addict_uk: Primus quote the following burn times and fuel comsumption as follows. These values are always made in ideal conditions (sea level, average air pressure, 20 degrees celcius). But due to this being a multifuel stove the variation in external air pressure and temperature can be over come to a point by more pumping.
The EtaPower MF will boil a litre of water between 2.5 - 3.5 min, depending on starting temperature. White fuel will last: 300ml - 1 hour - 27 litres of water, 530ml - 2 hours - 50 litres, 850ml - 3.5 hour - 80 litres, 1335ml - 5.5 hours - 125 litres.
These figures also require the use of the ETA pots.
Hope this helps.