Thread: Heat settings on Bosch Digital Heat Gun

Originally Posted by acroz

Hello all, I have been playing with a coretto for a few months with good results but just upgraded from a cheapy Skil ($29) heat gun to a Bosch professional digital model (2000w).

I tried a roast last night of 250g Guatemala, dropped it with the pan at ~80 degrees and set the heat gun at full fan and 630 degrees, ie, full power. I had first crack at 4 mins. By comparison my old gun would not have seen FC until 11-13mins doing the same things.

For other users of this gun, can anyone give me an idea of heat settings they are using?

My coretto is a Sunbeam bakehouse with the lid modified to accept the heat gun through the old vent and a chimney made of a bit of old rangehood flex up through the old sight glass port to carry the smoke and chaff away from me and the heat gun. Cant post a photo as haven't made enough posts on the site (lurker).

Cheers, Andrew

Morning Andrew, welcome to Coffee Snobs.

I use a similar Bosch heat gun, though mine is now over 10 years old.

Heat setting depend very much on the configuration of your Coretto.

I start all of my 750 gram roasts from cold, HG set around 500°C, always run the gun on medium blower speed, never use high, I aim for first crack approx 200° @ 14 minutes and second crack around or just before 225° @ around 19 minutes, this gives me a dark roast which I prefer.

A method of monitoring temperature is an enormous help, I use a digital multi meter with heat probe, seems most on this forum use the Heat Snob https://beanbay.coffeesnobs.com.au/V...re-data-logger connected to a PC, though I see they are sold out at the moment, I find the DMM option gives me all the control I require.

Here's a pic of my setup which may assist.
DSC_0277_669x1000.jpg

Hi Yelta,

thanks for the reply, I’m using a digital BBQ thermometer with a heat probe through the side into the lower part of the pan, ie into the beans to watch. With my old set up FC was always around 190-200degrees.

Strangely with the new heat gun the thermometer was reading about 140 degrees when RFC was well underway, so I think there may have been a malfunction there.

Set up is very similar, but I’m still using the lid of the bread machine.

Domestic thermometers are seldom accurate, the main thing is that they are consistent, consistency enables repeatable results, which of course is what we are after.