1 Insulation ObjectivesUnderstand how thermal energy transfer can be reduced Know some examples of insulation methods in the home

2 Name the three ways in which energy is lost from the home.

3 Insulation To keep things warm we need to stop CONVECTION, CONDUCTION & RADIATION. The methods we use are types of INSULATION.

4 CONDUCTION THROUGH SOLIDS Walls Windows Roof Floors

5 Air gaps between bricksTHROUGH GASES CONVECTION Loft Space Chimney Air gaps between bricks Draughts

6 Between radiators and wallsFROM HOT SURFACES RADIATION Hot water tank Between radiators and walls Hot pipes

7 What can we do to prevent this energy loss?

8 Walls Floors Roof Window Foam in wall cavity to stop CONDUCTIONCarpets trap air to stop CONDUCTION Floors Layer of roof insulation stops CONDUCTION Roof Double glazing – air gap stops CONDUCTION Window

9 Air gaps between bricksLoft Space Reducing loft space reduces CONVECTION Air gaps between bricks Using foam in the cavity reduces CONVECTION Using draught excluders reduces CONVECTION Draughts Blocking unused chimneys reduces CONVECTION Chimney

10 Hot water tank Hot pipesJackets lined with silvery material stop RADIATION Silver foil at the back of the radiator stops RADIATION Radiators Hot pipes Silvery pipe lagging stops RADIATION

11 STOPPING Conduction, Convection & RadiationConvection and conduction - take away the particles (a vacuum). Conduction – use insulating materials

12 Radiation - use shiny surfaces to REFLECT the heat back into the substance.

13 ACTIVITY Produce a leaflet for B&Q explaining how customers can reduce their fuel bills this winter by using INSULATION around their home.