On 17 Feb 2006 17:49:09 -0800, wrote:

Not usually involved with open flames but what is a lot of heat at low
temperature ?

Lots of power (much gas is burned) but it's a big diffuse flame and
never gets to a particularly high temperature in any part. Good for low
temperature things like weeds and tar, but not for warming iron up enogh
to make it forgeable.