2019 ACCO / PHCC Ohio Convention Embassy Suites Cleveland/RocksideMarch 27-29, 2019. Attendee Information Click here to find more information about the great seminars and events being offered on March 7-9, 2018 at the Hilton at Polaris, Columbus, Ohio. Exhibitor Information See a full list of exhibitors and view the expo floorplan to see which booths are still available. We will be updating the floorplan and exhibitor list as needed. Sponsor Information The Convention Committee has developed a variety of new Sponsor Opportunities designed to showcase your company to the entire plumbing and air conditioning community. Thank You Platinum and Gold Sponsors!