Heating and Insulating Buildings...

Heating and Insulating Buildings...

1. Heat is lost: through the roof, through windows, through gaps around the door through the walls and through the floor

   • In the picture above heat is lost mainly through the windows and the roof.
     • How can we save the energy from the house?
       • 1: Loft Insulation
         • 2: Cavity Wall Insulation
           • 3: Aluminium Foil behind radiators
             • 4: Double Glazing
               • 5: Draught Proofing

2. U - Values

   • What are U - Values?
     • U - Values tell us how much energy per second passes through different materials
       • In short: They measure how good of an insulator materials are.
         • The lower the U-value is, the better the material is as a heat insulator.
   • Which is the best insulator?
     • 1) cavity wall has a U-value of 1.6 W/m²
     • 2) solid brick wall has a U-value of 2.0 W/m²
     • 3) double glazed window has a U-value of 2.8 W/m².
       • Answer: 1 is the best and 3 is the worst
   • There is no equation you need to learn for U - Values

3. Reducing the Rate of Energy Transfers at Home

4. Solar Heating Panels

   • How do they work?
     • Solar Panels use energy from the sun to heat water.
       • They are usually fitted on the roof of the house facing south.
   • Is solar heating free?
     • Solar heating panels do not use fuel to heat water but they are expensive to buy and install

Imagens e arquivos do mapa