Ontario and Erie at The Westin Michigan Avenue Chicago

Ontario and Erie is 28.3 x 18.6 m (93 x 61 ft), 526 m² (5,666 sq ft), with a 3.7 m (12 ft) ceiling.

Plan view

LED wall that fits

Under a 3.7 m ceiling with 1.5 m trim and 0.3 m clearance you get 3 rows of 500 mm tile flown, which is tight; ground-stack or go lower on trim. Along the 28.3 m wall a Absen A2 Pro wall runs 45 x 3 (7560 x 504 px, 1,350 kg, 25 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, Ontario and Erie holds about 983 theater seats, 402 banquet seats at rounds of 10, or 276 classroom seats. Back row in theater is roughly 21.3 m from the downstage edge; the previz checks whether the bottom of the wall clears the heads in front.

Other rooms at The Westin Michigan Avenue Chicago

• Great Lakes Grand Ballroom22.3 x 32.9 m (73 x 108 ft) · 4 m ceiling
• Michigan Ballroom16.8 x 30.2 m (55 x 99 ft) · 3.7 m ceiling
• Michigan I-II30.2 x 16.8 m (99 x 55 ft) · 3.7 m ceiling
• Great Lakes West22.3 x 17.1 m (73 x 56 ft) · 4 m ceiling
• Great Lakes East22.3 x 15.5 m (73 x 51 ft) · 4 m ceiling
• Chicago Ballroom17.1 x 18.9 m (56 x 62 ft) · 3 m ceiling
• Millennium Park25 x 12.2 m (82 x 40 ft) · 2.4 m ceiling
• Great Lakes 3 (D and E)22.6 x 10.7 m (74 x 35 ft) · 4 m ceiling
• Great Lakes Foyer26.5 x 9.1 m (87 x 30 ft) · 4 m ceiling
• Great Lakes 2 (Prefunction & C)20.1 x 11.3 m (66 x 37 ft) · 4 m ceiling
• Great Lakes 1 (A and B)20.1 x 10.7 m (66 x 35 ft) · 4 m ceiling
• Huron Room28.3 x 6.1 m (93 x 20 ft) · 3.7 m ceiling

Published dimensions (source), fetched 2026-09-04. All rooms at The Westin Michigan Avenue Chicago · Venues in Chicago