As you will note in the operating instructions for the Pyro Classic, the fire will not give its full performance for the first few uses until the unit has fully cured and heat tempered.
A couple of quick checks to measure the approximate output levels is to hold your hand 10cm off the centre of the top plate when the fire is running. If you can’t keep it there for 5 seconds then the fire is cranking along. If you can between 5 – 10 seconds then the unit is performing well in its expected typical output range. If you can hold it there for more than 10 seconds then you can probably hold it there indefinitely and so depending on the heat required you could load a fresh fuel charge in and begin the cycle again.
The side panels are also a good indicator of when a Pyro is fully heat cycled. If the bottom back corner of the side panel is warmer than skin temp then the whole cylinder is hot, if it’s not warmer than your hand then it is still warming up.