This is a complicated subject, affected by a variety of factors, but complex or no, I give the question my best shot on my blog: Gas Stoves: How Cold Can I Go?
I give both a simple answer for easy planning purposes and a more complex answer for those who really want to get into the details.
Have a look if you like,
HJ
Gas Stoves: How Cold Can I Go?
The blog has done really well lately. Nearly a thousand visitors yesterday alone, over 14,000 for November. Somebody must like what I'm writing.
Don't know where it'll end up, but enjoying it for now.
HJ