At air temp of 79F (26C) it takes 2 minutes to bring 2oz (56g) of wood (loaded combustion chamber) to a sustained burn, then just over 3 minutes to bring 8oz (227g) of water to a boil. The 2oz of wood burned down at 8-9 minutes total. Reloading the chamber can indefinitely extend the burn.
At a sustained burn the center/circular cast plate reaches a temperature of over 300F (149C), while the top (rectangular) surface varies from 80F-110F (27C-43C).
Without any quenching the stove takes about 10 minutes to cool to the touch.