A single-storey brick veneer house (single layer of brick on atimber frame) has a front corner lounge-room with a floorplanmeasuring 4.0 m by 3.8 m. The ceiling is 3.0 m high. The buildingfabric of the two exterior walls comprises a 12 mm thick layer ofplaster, a 100 mm air gap and the exterior house bricks (110 mmthick). One of these walls has a window measuring 2.7 m wide by1.35 m high, featuring a 3-mm thick glass pane installed in themid-1950s. The floor is carpet over 19 mm thick pine floorboards,and the house is on stumps with a ventilated air gap between theground and the floorboards. The ceiling is 12 mm plasterboardcovered with a 50 mm thick layer of loose fill insulation in theroof cavity. This house is located in suburban Melbourne.
Estimate the cost to heat the interior of this room to 21°C allyear round using a mid-level residential gas central heatingsystem. Assume the under-floor and roof cavity temperatures areequal to the outside temperature.
