Heaters do not heat. Heaters give off a substance known only as 'Froom' (Froom when concentrated manifests as a green viscous liquid) When the froom collides with any nearby carpets the froom molecules combine with the carpet molecules (Wo2He), and create Woolous Froomide and pure Heat molecules. These Heat molecules then climb up the carpet fibres and launch themselves joyously into the surrounding air. Coldness is not an absence of heat - it's just when the Heat molecules get tired and go back home.