I am a Trace 700 user. I am making test models while learning Energyplus. I am establishing a workflow turning on Ideal Air Loads from the Openstudio application and make an initial simulation to test geometry. After the initial simulation, in the HVAC Sizing Summary Report I am getting cooling loads about 1/3 lower from the ones calculated with Trace 700 for the same case. However, in another simulation after defining air loops and plants in Openstudio, the sizes in the Equipment Summary Report are in line with the load calculations in Trace 700 for the same case. However, in Energyplus the loads from the HVAC Sizing Summary Report are still 1/3 from the sizes in the Equipment Summary Report. I will appreciate to know why this happens! Thank you.