I reloaded my stove today which was 20 degrees out and had good hot coals. I have a double wall pipe and it quickly got up around 500 outside temp. I did not have my 4 medium pices in there prob 7 minuets. I quickly turned in down to around 1 on the air on my fireview. Usually I get around 350 or so for the same outside temp on the doublewall pipe. It smelt plenty hot- I guess any pipe clleaning in a mute point-lol. The pipe soon came down to 200 after I engaged the cat, which is normal for me. Just thought that was supersonic for just baily sticking the wood in there.