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The design and construction of modern houses is undergoing radical change with particular emphasis on sustainable energy - Leaving Cert Home Economics - Question 1(a) - 2014
Question 1(a)
The design and construction of modern houses is undergoing radical change with particular emphasis on sustainable energy. (i) Identify three areas of the house that... show full transcript
Worked Solution & Example Answer:The design and construction of modern houses is undergoing radical change with particular emphasis on sustainable energy - Leaving Cert Home Economics - Question 1(a) - 2014
Step 1
Identify three areas of the house that should be insulated in order to reduce heat loss. Recommend a method of insulation for each area and explain the underlying principle of each method.
Answer
- Attic/Roof Insulation:
- Method: Use blanket insulation, such as fiberglass.
- Principle: Blanket insulation reduces heat loss by creating a barrier that traps air and limits conductive heat transfer.
- Wall Insulation:
- Method: Insulate external walls using polystyrene sheets or cellulose.
- Principle: These materials are poor conductors of heat and minimize the transfer of heat between the inside and outside of the house.
- Floor Insulation:
- Method: Use rigid foam boards beneath floorboards.
- Principle: Insulating the floor prevents heat from escaping through the bottom of the house, further maintaining indoor temperatures.
Step 2
Name and set out details of one renewable energy source you have studied. Include reference to: - source - advantages / disadvantages - sustainability.
Answer
Source - Solar Power:
Solar power harnesses energy from the sun using photovoltaic cells.
Advantages/Disadvantages:
- Advantages: Renewable, abundant energy source; low operational costs; minimal environmental impact.
- Disadvantages: High initial installation costs; efficiency dependent on geographical location and weather conditions.
Sustainability:
Solar power is highly sustainable as it reduces reliance on fossil fuels and can significantly lower carbon emissions.
Step 3
Write an informative note on the Building Energy Rating (BER) system.
Answer
A Building Energy Rating (BER) is a standard measure of the energy efficiency of a building's design and energy use. It is similar to an energy label found on appliances, utilizing a scale from A1 (most efficient) to G (least efficient). Since January 2009, a BER certificate has been required when selling or renting a property.
The rating informs potential buyers and renters about energy costs, encourages better energy practices, and promotes energy-efficient measures. Owners can seek a certificate that indicates their building's current performance and offers recommendations for improvement.