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O'Hare Ballroom B at Hyatt Regency O'Hare Chicago

Published dimensions

O'Hare Ballroom B is 9.4 x 9.1 m (31 x 30 ft), 86 m² (920 sq ft), with a 2.9 m (10 ft) ceiling.

Plan view

LED wall that fits

Under a 2.9 m ceiling with 1.5 m trim and 0.3 m clearance you get 2 rows of 500 mm tile flown, which is tight; ground-stack or go lower on trim. Along the 9.4 m wall a Absen PL2.5 Plus V2 wall runs 15 x 2 (3000 x 400 px, 234 kg, 4.8 kW).

Panel	Pitch	Wall (cols x rows)	Size	Resolution	Weight	Power (max)
Absen KLCOB 0.78	0.78 mm	12 x 3 = 36	7.2 x 1 m	9216 x 1296	162 kg / 357 lb	3.2 kW, 15 A @ 208 V
Absen PL2.5 Plus V2	2.5 mm	15 x 2 = 30	7.5 x 1 m	3000 x 400	234 kg / 516 lb	4.8 kW, 23 A @ 208 V
Absen PL3.9 Plus V2	3.9 mm	15 x 2 = 30	7.5 x 1 m	1920 x 256	234 kg / 516 lb	4.2 kW, 20 A @ 208 V

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, O'Hare Ballroom B holds about 3 theater seats, 1 banquet seats at rounds of 10, or 0 classroom seats. Back row in theater is roughly 2.4 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 AB22.7 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