cold to hot

east to west

hot to cold

north to south

Electricity

the electromagnetic spectrum and particles

air or water flow

direct contact

In physics, the capacity for doing work.

In physical science that deals with the relations between heat and other forms of energy (such as mechanical, electrical, or chemical energy), and, by extension, of the relationships between all forms of energy.

Heat is energy that is transferred from one body to another as the result of a difference in temperature.

A substance that has no fixed shape and yields easily to external pressure; a gas or (especially) a liquid.

Something that keeps objects warm

Something that stores thermal energy

Something that slows the transfer of thermal energy

Something that allows the transfer of thermal energy

...to reflect the infrared radiation back into the room

...because who wouldn't want a bit of bling behind their radiator?

..to absorb the dissipated heat

...to stop the walls getting damaged by the heat

The insulating material has a vacuum that doesn't allow conduction or convection to occur

The insulating material has trapped air pockets that slows conduction and convection from occurring

All the insulating material is put at the top of the house because heat rises

All the insulating material is put in the walls because they have a large surface area

£14,400

£1200

£830

£1.20

14.4 months

22.5 years

0.083 years

12 years

Loft insulation

Cavity wall

Double glazing

Draught proofing

Double glazing

Cavity wall insulation

Loft insulation