Posts Tagged Low carbon house design

Low Carbon House Design | Part 5

Elements of Low Carbon House Design

In this article, we will study the elements of low carbon house including design of windows and skylights, door air-gaps, airtightness, thermal bridging and understanding monthly energy demand profiles.

Windows and skylights

Ultra-efficient triple glazing will be used for windows and skylights in combination with insulated timber frame. According to Passivhaus standard, 1990, the resultant U-value will be 0.8 W/m2K.

Use of LED lights. Making use of day lighting from the roof and the windows. This would help reduce the reliance on artificial lighting. Shutters and louvers can be used to control solar gain and glare. (Halliday, 2008 p. 69)

Door Air-gaps

Loss of energy can be prevented by installing automatic door closers. The inside of the doors can be installed with brush strips to close the air gaps near the flooring. Modern, well-insulated doors can improve comfort levels by decreasing loss of heating and cooling.

Airtightness

It is estimated that up to 15% of energy is wasted to losses through the building fabric. Of those losses, up to 20% energy can be lost through windows and roof, while up to 35% heat energy lost is through air gaps near the doors..

Airtightness

Airtightness. Source: Carbontrust.com

 

To ensure airtightness of the building, wet plaster will be applied to the inside of the wall. This will minimise shrinkage between the wall and the floor. Airtightness tapes and membranes will be used to seal all the corner joints of windows and doors. Airtightness tape will be applied at junctions with plaster. It will make the low carbon house 20 times more airtight as compared to the standard homes built according to the building regulations (Passivhaus, 1990).

Airtightness grommets will be used around cabling and pipework to ensure that there is no leakage of air.


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Low Carbon House Design Methodology | Part 2

Stepwise procedure for designing the low carbon house

Step One

Identifying nationally recognized methods for assessing the environmental performance of new buildings in the UK with the article to click here.

Most widely used methods include Code for Sustainable Homes (CSH) 2006 and British Research Establishment Environmental Assessment Method (BREEAM). Other methods include Association for Environment Conscious Building (AECB) Silver and Gold and PassivHaus.

Policies for Sustainable Development in Brighton and Hove

The City Plan Policy CP8 for Sustainable Buildings supported by Supplementary Planning Documents, SPD 08 – Sustainable Building Design is expected to deliver viable development that considers community aspirations, environmentally sensitive, high quality, adequate infrastructure and helps in mitigating the impacts of climate change by gradually transitioning towards achieving a low carbon economy (NPPF, 2012).

National Planning Policy Framework, 2012 expects the local plan policy to play an active role in guiding the development that is viable and sustainable. The real estate for sale of One Planet approach have been adopted by the Brighton & Hove City Council which aims at radical reductions in greenhouse gas emissions by reducing energy consumption before the construction and after it is built. Mitigating the impacts of climate change is an important aspect of delivering Sustainable development (Low Carbon Construction, 2010).

Her Majesty’s Government proposed Climate Change Act in 2008 which was the world’s first long-term legally binding framework to tackle the dangers of climate change. It include a statutory commitment to reducing the carbon dioxide emissions by 34% by 2020 and 80% by 2050.

Step two

One Planet living principles

It provides a framework that helps us examine and evaluate the sustainability challenges that we face and develop action plans in order to create a sustainable and healthy environment.

Sustainable design principles

One Planet Living. Source: bioregional.co.uk

The ten principles are as follows:

  • Zero Carbon
  • Zero waste
  • Sustainable transport
  • Sustainable materials
  • Local and sustainable food
  • Sustainable water
  • Land use and wildlife
  • Culture and community
  • Equity and local economy
  • Health and happiness


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