Gas water heater draft hoods provide additional air for the combustion process gases, to be properly pulled out from the burner chamber (base of the water heater), into the water heater vent pipe and the chimney.
Mycelium is a block added in Minecraft the same time as the introduction of the Mushroom Biomes in Minecraft 1.9pre1. Mycelium can only be found and only can be found in Mushroom Biomes. Mycelium resembles dirt in that it can be broken with a shovel and it without a 'Silk Touch' enchanted tool it only drops dirt when broken. Mycelium also lets off a small particle effect the same as Bedrock.
mycelium. n, pl-lia (-lÉªÉ). 1. (Botany) the vegetative body of fungi: a mass of branching filaments (hyphae) that spread throughout the nutrient substratum. [C19 (literally: nail of fungus): from myco- + Greek hÄlos nail]. (maÉªËsi li Ém).ypha-any of the threadlike filaments forming the mycelium of a fungus. sclerotium-compact usually dark-colored mass of hardened mycelium constituting a vegetative food-storage body in various true fungi; detaches when mature and can give rise to new growth.