U-Values (Leaving Cert Construction Studies): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
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Practise the cards
10 cards from this deck
What is heat gain?
What is heat gain?
Increase in temperature inside building from various sources
3 main sources of heat gain
3 main sources of heat gain
Solar radiation, body heat, electrical appliances
Ireland's heat gain strategy
Ireland's heat gain strategy
Maximise heat gain (unlike warmer countries that reduce it)
Best building orientation for heat gain
Best building orientation for heat gain
South-facing (receives most consistent solar energy)
Most significant source of natural heat gain
Most significant source of natural heat gain
Solar heat gain
Solar panels % of hot water heating provided
Solar panels % of hot water heating provided
40-60%
Optimal solar panel positioning
Optimal solar panel positioning
Within of south-facing
What photovoltaic cells do
What photovoltaic cells do
Convert sunlight into electricity
Max openings area as % of floor area
Max openings area as % of floor area
30% (doors, windows, rooflights)
What U-values measure
What U-values measure
How much heat passes through building elements (lower = better insulation)