Ключевые слова: bio, biofuel, biomass, boiler, boilers, briquettes, burn, central, chip, close, coniferous, conservation, eco, ecology, energy, environmentally, fire, fireplace, flaming, friendly, fuel, granule, green, heating, horizontal, macro, mass, natural, pellet, pellets, pieces, power, recycling, renewable, sawdust, shot, source, stove, studio, wood, woodchip,