firewoods burn in the boiler while other woods are added to it

House, Environment, Light, Red, Natural, Burning, Fire, Burn, Hot, Orange, Heat, Wood, Oil, Industry, Industrial, Bright, Energy, Black, Smoke, Bonfire, Fireplace, Electricity, Factory, Pollution, Flame, Fuel, Comfort, Oven, Warm, Log, Glare, Blaze, Stove, Firewood, Boiler, Coals