Grand Ballroom AB at Hyatt Regency O'Hare Chicago

Grand Ballroom AB is 22.7 x 22.7 m (74 x 74 ft), 515 m² (5,547 sq ft), with a 7 m (23 ft) ceiling.

Plan view

Shape approximate: the venue publishes area only, so this room is drawn as a square of equal area.

LED wall that fits

Under a 7 m ceiling with 1.5 m trim and 0.3 m clearance you get 10 rows of 500 mm tile flown. Along the 22.7 m wall a Absen PL2.5 Plus V2 wall runs 36 x 10 (7200 x 2000 px, 2,808 kg, 57.6 kW).

Wall sizing assumes 1.5 m trim to the bottom edge, 0.3 m clearance under the ceiling, and a wall no wider than 80% of the longest wall. Weight and power are tile totals from the panel spec sheet; add processing, rigging, and cable.

Seating estimate

After a 12 x 7 m stage, Grand Ballroom AB holds about 958 theater seats, 392 banquet seats at rounds of 10, or 269 classroom seats. Back row in theater is roughly 15.7 m from the downstage edge; the previz checks whether the bottom of the wall clears the heads in front.

Other rooms at Hyatt Regency O'Hare Chicago

• Grand Ballroom69.2 x 40.8 m (227 x 134 ft) · 7 m ceiling
• Grand ABCD46 x 56.1 m (151 x 184 ft) · 7 m ceiling
• Grand EFGH46 x 56.1 m (151 x 184 ft) · 7 m ceiling
• Grand ABCDE46 x 40.8 m (151 x 134 ft) · 7 m ceiling
• Grand DEFGH46 x 40.8 m (151 x 134 ft) · 7 m ceiling
• Rosemont Ballroom Complex37.4 x 37.4 m (123 x 123 ft) · 5.6 m ceiling
• International Ballroom40.2 x 25.3 m (132 x 83 ft) · 2.6 m ceiling
• Rosemont Ballroom36.2 x 24.7 m (119 x 81 ft) · 5.6 m ceiling
• Grand ABC40.8 x 18.6 m (134 x 61 ft) · 7.6 m ceiling
• Grand Ballroom FGH40.8 x 18.6 m (134 x 61 ft) · 7 m ceiling
• Grand Ballroom Foyer27.3 x 27.3 m (90 x 90 ft) · 3.1 m ceiling
• Grand Ballroom BC22.7 x 22.7 m (74 x 74 ft) · 7 m ceiling

Published dimensions (source), fetched 2026-09-05. All rooms at Hyatt Regency O'Hare Chicago · Venues in Rosemont