A hampster

YOU di'n't turn the HEATing off when YOU shut down the SCHOOL,
and NOW you 'got to USE a fan if YOU want to stay COOL.
You try to TURN the radiATOR down,
but you CAN'T find the right TOOL,
now the ROOM is getting REALly HOT,
and the ENergy costs QUITE a LOT,
and the HEATer's fans, they SOMEhow SEEM to SAY,
YOU can't STOP the
MOTION of conVECTION or conDUCTION of HEAT,
and you CAN'T stop radiATION 'less you 'got a lead sheet,
and right NOW some ventiLATION would BE pretty NEAT,
but oh NO-oh-oh-oh,
You can't STOP the HEAT!

well done

Fire, perchance?

It was a shameful dispwey..... :3

*figured out The Riddler's riddle