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Need to Book Multiple Group Reservations?    Process Heating-Cooling Show 2021 Welcome to the Process Heating & Cooling Show reservation site! A block of rooms has been reserved for June 11, 2021 - June 21, 2021. Booking a reservation from our site is simple. To begin the process, click on "Book a Room" below to receive your group's preferred rate. See you at the DoubleTree by Hilton Hotel Chicago O'Hare Airport - Rosemont in June! We hope you enjoy your stay and your group's event! Attending an event at our hotel? Special room rates have been arranged for this event. Click on the room type below to view room details. 2 DOUBLE BEDS NONSMOKING rates from 179.00 USD/Night 1 KING BED NONSMOKING rates from 179.00 USD/Night 11 June 2021 - 21 June 2021 Book early to reserve your room! Terms & Conditions back to top