Energy-efficient house

By Admin | Building
22 May 2016

In recent years, public attention, industry leaders and focuses on reducing consumption of all forms of energy.Building material and design plays a key role in energy efficiency.What you should know if you have already decided on the building blocks and bricks will be used?

How much energy do we use?

Maybe you will be surprised to learn that 39% percent of the energy consumed by the average homeowner goes into heating or cooling.For comparison, lighting and cooking combined together constitute only 9%.So reducing the cost of heating and cooling, we obtain significant benefits.But is it possible to reduce energy consumption for heating and cooling, while maintaining a reasonable temperature conditions inside the house?

Passive design

Passive design converts solar energy to maintain the natural heating or cooling the house.

There are 4 basic principles of passive design:

  1. orientation.
  2. ventilation.
  3. insulation.
  4. thermal mass.

Cornice protects the window from the high summer s

un.Brick walls absorb ambient heat, helping to keep the comforts of home.

Low winter sun penetrates the cornice.Direct and reflected radiation is absorbed by the brick walls and allows you to keep warm at night in your house.

Fig.1. Passive design (top - winter, at the bottom - summer)


Large windows in the southern part of the house (where the sun is most of the time) was passed by the rays of the low winter sun.Simple shading, such as eaves, covers high summer sun.


In mid-summer, the air must be free to enter and exit the building, naturally cooling the house and its inhabitants.Cross-ventilation increases the opening of doors or windows at both ends of the house with minimal internal obstructions.


wall and ceiling insulation is a barrier to the movement of heat.The effectiveness of the insulation R-value is measured.However, R-value of the parameter is not complete.Different wall may have the same R-value, but have different efficiency becauseR-value does not reflect the benefit of the specific heat.

Heat capacity

Heavy and thick wall materials such as brick from Austral Bricks, absorb heat and prevent its passage through the wall.This constrains the temperature drops, slowing down the heating in summer and keep warm in winter.This is called "period of delay".Light walls, assembled from lining or corrugated iron, have a lower heat capacity compared with brick walls.

Air blocks (very high heat capacity, delay period of 7-8 hours)
Facing brick (high heat capacity, delay period 5-6 hours)
Molded (low heat capacity)

Fig.2.Because of the heat capacity, concrete blocks and bricks are able to trap heat more than the lining, even if the R-value of the walls of the same.

Choosing a brick, think about the heat capacity

first two basic principles of passive energy efficient design - orientation and ventilation - should be incorporated in the layout of the house.Insulated walls will have the same R - value, in spite of the material used.However, the choice of material for the walls has a major effect on the magnitude of the heat capacity of the building.

simple and economical way to achieve the required heat capacity use brick Astral Bricks.Clay bricks have a very high heat capacity and help make your home more comfortable and energy efficient.

Outside temperature
building with walls of lining
structure with an outer insulation bricks

Fig.3. The impact of the specific heat on temperature fluctuations

Studies at the University of New Castle showed that "most of the heat is reflected back to the outer surface of the brick."They also found that the internal temperature in the summer in a brick building remains within the "comfort zone for the people" despite major fluctuations in the ambient temperature.

What can we summarize

Passive design will reduce your costs for heating and cooling.It's good for you and for the environment.
Heat capacity - the basis of the passive design.
Brick - a simple and cost-effective method to increase the heat capacity of the future in your home.