One short split can become two pieces with a single cut along the grain. The stick count doubles; the amount of wood hardly changes. That is the detail behind cooking with small wood on the Hillrein Zhengtu: “one to two pieces” is a convenient simmering guide, not a measured fuel dose.
If yesterday's two pieces were slender and today's are chunky, copying the fan setting and stick count will not necessarily copy the fire. Before blaming the control dial, compare what actually went into the chamber.
Cooking with small wood: separate length, count, and quantity
Dry wood around 10 cm long is the practical Zhengtu fuel format. Length helps the pieces fit and makes handling manageable. It does not specify their thickness, mass, or burning behavior. Two short slivers and two short blocks can have the same length and count while containing very different quantities of wood.
Thickness also changes how much surface is exposed relative to the amount of wood. Splitting a piece changes the way it catches and burns even when nearly the same total material remains. There is no universal rule that two pieces give twice the heat of one: chamber temperature, airflow, dryness, and the existing fire all matter.
A cold-fuel comparison that makes the difference obvious
Before lighting, compare two small groups from the same dry fuel supply. Choose pieces of roughly similar length and look at their thickness. If you have a kitchen scale, weigh the groups away from the stove. The purpose is to see how much the quantity varies, not to create a gram-by-gram feeding schedule.
Using the same supply makes this comparison easier to interpret. A heavier damp piece is not automatically better fuel: part of its weight is water. Do not use weight alone to decide whether wood is dry, and do not treat two equal-weight samples of unknown fuel as an exact combustion comparison.
What the one-to-two-piece simmer guide actually means
For soup, porridge, and slower cooking on an established hot Zhengtu, about 20% fan with one to two short dry pieces is a useful starting point. It describes a small working load. It does not mean adding two new pieces at every check regardless of how much fuel is already burning.
Look at the remaining load and the cookware first. If the pot is simmering steadily and there is still active fuel, another pair may only build more heat than the dish needs. When fuel is running low, use a modest addition before the fire collapses and let the response become clear before adding more. Keep all pieces comfortably within the stove's loading guidance.
For wok cooking, the goal changes: a fuller working load with about 80% fan gives the practical high heat needed for quick recovery. Fuller still means space for airflow, not tightly packed wood. Continuous 100% fan is possible, but consumes wood faster and does not solve every cooking problem.
The fan setting needs a fuel context
Zhengtu is a fan-assisted wood gasifier stove. Its annular oxygen intake supplies air around the burn zone, helping burn the wood gas once the chamber is hot. The dial controls airflow; it cannot make a nearly empty fire behave exactly like a fresh substantial load.
Higher fan can make the visible flame lower while heat beneath the cookware becomes stronger. Watch the pot or pan rather than using flame height to decide that today's two pieces are weaker. Useful wood stove fire control comes from reading fuel and cooking response together.
Keep a usable reference, not a rigid formula
- Fuel: use dry short pieces from a reasonably consistent supply.
- Quantity: compare thickness and the amount already burning, as well as stick count.
- Cooking stage: distinguish a small simmering load from a fuller high-heat load.
- Response: make a modest adjustment and observe the cookware before making another.
In suitable steady use, Zhengtu can consume less than about 1 kg, or 2 jin, of dry wood per hour. That is a conditional operating reference, not a guaranteed rate or something you can calculate by counting sticks. Dryness, airflow, wind, cookware, and cooking style affect consumption. A low wood consumption stove still needs fuel matched to the meal.
When starting the Hillrein Zhengtu stove, use a loose load of dry kindling and short wood, let the chamber warm, and raise the fan gradually after the fire establishes. Startup and refueling may produce visible smoke. Use a suitable outdoor location and follow the operating instructions. The useful question at the next refill is how much fuel the dish needs, rather than whether you have reached a particular stick count.