<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Dear TRNSYS users,<br><br>I am trying to simulate a house with a solar hot water system. The simulation is showing a very strange result. Despite the fact that the temperature from the tank that is reaching the house is constantly 70 C throughout the year the average temperature of the house is barely above 20 C, and this during the summer months. The controller for the hot water loop of the house is having the system on when the temperature falls below 21 C. Do you know why is this happening? Would these 70 C of inlet temperature in the house be enough to maintain a temperature of 21 C? Thank you for the help.<br><br>Best Regards <br><br>Tasos <br></td></tr></table><br>