A thermodynamic model of a detached house using district heating has been created in Mathworks Simulink to form a realistic tool to test new control methods to optimize district heating systems. We here present the experimental validation process of the model. Detailed measurements were made using high performance ultrasonic flow-meters with embedded temp sensors. The flow-meters measures e.g. total tap water consumption, total primary energy consumption and radiator energy consumption separately. We show satisfying thermodynamic results of the model versus the real house. We also show that wind and sun exposure play a role in this validation.