I have a question regarding HVAC system types in eQuest. My baseline building is modeled as a packaged variable volume system (It is a System 5) while my design building is mostly modeled as a bunch of packaged single zone systems. For some reason I am getting a 70% reduction in gas consumption, even thought my efficiencies are pretty similar. This reduction seems unreasonable. Is there something about the packaged variable volume system in eQuest that I don't know about? What type of system do people usually use for a system 5?

- Thanks,

Scott Tomlinson, PE, LEED-AP