Change of luck
When the school let out for lunch roy chose to stay in his "office" (a small desk in the furnace room) so he could avoid any unwanted run ins with students and to eat his own lunch.
Survival Together
Based on the top of a small hill and partially hidden by newly planted pines, an open porch gave way to a decently sized first floor with a workshop, large furnace, and connected garage.
The Magnum Opus - Chapter 3
He pushed his brother off him with one, enormous arm and then turned towards his furnace. falling on all fours, he lifted his ass towards his brother while his cock was angled straight at the furnace mouth.
Pleasing the Wing Leader
He was pretty sure none of that extra heat came from the scolding air of the armory, its walls dotted with open furnaces, forges, and freshly smelted armor.
Crux
I stepped back and hit the furnace, opening the hatch, which spat out another body. finally, my guard arrived.
The Good-Hearted Wish
After a few more strikes, she slowly moved to pick up the sword-in-progress, moving it over and back into the furnace to heat it up, foot going onto the bellows and slowly pushing down and back up to heat up the furnace and get the steel hotter still to shape
the unseen
Hearing of the scales he went to the village leader and asked if he could try and mold the scales using the heat of his furnace.
Steam Pirates Part II
Eventually we reach a large room with a furnace in the middle. sailors are shoveling coal into the furnace and others are pulling leaves and turning valves and knobs. "this is her engine room, and i am one of her engineers. now..."
Together, Soaring - by Jeeves
Creating a furnace of fertility within their entwined bodies.
CP-01 The Jack of All trades
As long as firepaw didn't have to return to the hell furnaces, he would likely join it, himself. i cannot speak for the two behind us."
Zap
And what a furnace burns in yonder star, that its light pierces daylight's turns. and too late i find, that my insectile mind, has lead me to a clever trap, built by unknown hands.
Colony Collapse Disorder
I saw them turn, like furnace sparks made flesh, to rise and run as swift as their sun's rays that ever burn, to take pursuit again. i saw their stores stuffed but to bursting with the sweet of meads.