NOTE: On-line registration for Trade Show Only is closed, but if you meet the criteria listed below you may register on-site at the Expo. FREE admission for petroleum marketers, petroleum distributors and retail dealers, oilheat technicians, HVAC contractors, C-store marketers, propane marketers, HVAC supply houses and petroleum equipment contractors, students, instructors, drivers and plumbers. If petroleum marketer is also a wholesale fuel supplier and not otherwise participating as sponsor or exhibitor, they are required to pay a registration fee.