Differences between revisions 19 and 20

Eco friendly building

Design ideas / principles

Eave overhang: A general rule of thumb for the depth of your eave is 45% of the height of your window (this is the measurement from the bottom of your window to the underside of the eave). From: Green Homes Nz
Thermal mass as energy stabiliser - Water has the highest VHC of these and the table tells us that it takes 4186KJ to raise the temperature of one cubic meter of water by one degree, whereas it only takes 2060KJ to raise the temperature of an equal volume of concrete by the same amount.
Windows - double glazing with Low-e reflective coating to reflect infrared heat back.
- Insulated frames, especially aluminium frames need a thermal break
Wall insulation
- https://www.energywise.govt.nz/at-home/insulation/wall-insulation/
- https://www.building.govt.nz/assets/Uploads/building-code-compliance/e-moisture/e2-external-moisture/constructing-cavities.pdf
Roof water harvesting and storage
- Storage - cool side of house
  - In Wall
  - Under Slab
  - Under ground yard tanks
Roof designed for solar
- http://www.roofer.co.nz/case-studies/a-unique-power-generating-roof/
Build for solar in future
- 2014-Build-pv_solar_ready.pdf

* Green Homes New Zealand: 2018:GHNZeBook2016-Web181116.pdf

.A simplistic rule of thumb that is often used when designing dense masonry walls, is that heat will be absorbed and lost at around an inch per 2 hours. i.e a 4inch (100mm) thick masonry wall will absorb and shed its heat load in around 8 hours and a 8inch (200mm) thick wall in around 16 hours.

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+ * Build for solar in future
   * [[attachment:2014-Build-pv_solar_ready.pdf]]