Still quality affects the fuel-burn efficiency. A still built to 50ql and fueled with one log, for example, will burn for about 1.5 hours, while an 85ql still will burn for about 2.5 hours on one log. This burn time increases and decreases in conjunction with still quality.
To light the still, activate a [[steel and flint]] with while having a [[kindling]] in your inventory, . To then to fuel the still , activate any item that can be used as [[fuel]] (for example, wooden items), right-click the still , and select '''Burn'''.
A still has 2 internal compartments - a boiler and a condenser.