The Prisoner
As he was walking to his ride, the air felt like it was coming from a freshly opened blast furnace. and having all that fur didn't help much either. ignoring the heat he moved towards the truck passing by some nice looking cars and trucks.
The Nose Knows
The desk faced the stairwell and a wooden door remained closed off to his right, hiding the furnace and water heater.
Eggceptional Get Aways: Erakir
He could tell it was like being inside a furnace but his body was strangely comfortable with that. it didn't take long to identify the source of the heat. as for where he was... he and the remains of his egg were sitting on some kind of golden object...
A First for Everything: An Axel and Isaac Story
_wow... he's got really soft fur too... and he's so warm, he's like a furnace..._ "i didn't know... i can tell how upset you are about how you acted. you know, that just makes me more certain that i want to be your friend.
Grow-tion
He would've really appreciated if they mentioned his body glowing hotter than a furnace, though.
ROI - Prologue: The Scrap
The blade glowed in a terrible light like it was still in progress from the furnace. a man cloaked in crimson robes stood to scan the work of his destruction.
Anchored Episode 6- A Day With a Seeker
It was like staring into a furnace, there was so much power in this lizard that archie had to wonder how drake remained in his beast form.
Castle Crasher
It was only thanks to being a dragon -- effectively a living furnace -- that he could maintain his own body temperature effectively enough to avoid shivering from the cold. not that being able to manage it made the chill any more enjoyable.
Ander - Part 6: Subchapter 173
It was like the sound of a bellows pushing wind through a furnace, but instead of wind, it was actually blowing thunder, and instead of a furnace, it was travelling through a cavern of flesh.
Eudaemon III: Rebirth / Epilogue
Even living together, in this climate they didn't need a furnace or air conditioning, and blankets did more than well enough to keep them comfortable even on the coldest of nights... but it was nice to have something to do, and zerrex thought it was goddamn
Creation
The first thing he did after seeing the armor was get a furnace ready as he had the armor on the forge.
Hell on Earth. Chapter 23. END
Rave roared again, heating up the air with another furnace blast. his wings blotted out the sky. he'd completely broken out of the confines of the ancient building now. "what are we going to do??"