Hearthstone vs Progress, bee in bonnet

[fire_man]

Maybe we are getting twisted on the words "thermostatically controlled".

I think when WS says "The secondary combustion system engages as exhaust temperatures reach about 1000 degrees F" they are referring to the ignition temperature when the gases naturally ignite. This would agree closely with my experience, when the stovetop reaches 500ºF the firebox ignites and the rule of thumb per WS is the stovetop is about half the internal firebox temp.

AI Overview
Wood smoke gases ignite at varying temperatures, but generally, the flammable gases (like methane, methanol) released during wood's gassification (around 500-700°F) need sufficient oxygen and temperatures of at least 1100°F (600°C) in the firebox for clean, complete combustion (secondary combustion) to burn those gases efficiently, though the initial wood ignition starts lower, around 400-600°F, with the gases themselves igniting if exposed to a flame/spark.
Stages of Wood Combustion & Gas Ignition

1. Drying (Under 500°F): Water evaporates, no flame.
2. Gassification/Pyrolysis (500-700°F): Wood breaks down, releasing flammable gases (volatiles) and tars; these gases burn if an external flame/spark is present, but don't self-ignite yet.
3. Primary Combustion (Around 540°F+): The solid wood char burns, releasing more gases.
4. Secondary Combustion (1100°F+): The key to clean burning; these high temperatures + sufficient oxygen burn the unburned gases from step 2, producing more heat and less smoke.

 

[Highbeam]

Maybe we are getting twisted on the words "thermostatically controlled".

I think when WS says "The secondary combustion system engages as exhaust temperatures reach about 1000 degrees F" they are referring to the ignition temperature when the gases naturally ignite. This would agree closely with my experience, when the stovetop reaches 500ºF the firebox ignites and the rule of thumb per WS is the stovetop is about half the internal firebox temp.

AI Overview
Wood smoke gases ignite at varying temperatures, but generally, the flammable gases (like methane, methanol) released during wood's gassification (around 500-700°F) need sufficient oxygen and temperatures of at least 1100°F (600°C) in the firebox for clean, complete combustion (secondary combustion) to burn those gases efficiently, though the initial wood ignition starts lower, around 400-600°F, with the gases themselves igniting if exposed to a flame/spark.
Stages of Wood Combustion & Gas Ignition

1. Drying (Under 500°F): Water evaporates, no flame.
2. Gassification/Pyrolysis (500-700°F): Wood breaks down, releasing flammable gases (volatiles) and tars; these gases burn if an external flame/spark is present, but don't self-ignite yet.
3. Primary Combustion (Around 540°F+): The solid wood char burns, releasing more gases.
4. Secondary Combustion (1100°F+): The key to clean burning; these high temperatures + sufficient oxygen burn the unburned gases from step 2, producing more heat and less smoke.

Now ask your AI if Woodstock uses a bi-metallic coil.