I've tried to model a building and the results shows a very low heating consumption ?

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the building area is 648 m^2 located in libya, i Use HVAC system a unitary system, the unitary shows very low and near to zero heating load, even i Ideal air load shows a small heating load, i tried change the wwr% for the building it didn't change, and when i edit heating thermostat more than 20c i have faild run.