Question: The structure of a house is such that it loses heat at a rate of 5400 kJ/h per C difference between the indoors and outdoors.

The structure of a house is such that it loses heat at a rate of 5400 kJ/h per °C difference between the indoors and outdoors. A heat pump that requires a power input of 6 kW is used to maintain this house at 21°C. Determine the lowest outdoor temperature for which the heat pump can meet the heating requirements of this house.

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