Ceiling set. Four diffusion panels at 75.5 x 149. Panels this size want two people on the change: diffusion media that gets creased or folded during installation channels air through the crease line and prints a velocity stripe onto the downdraft column. Unbox flat, support the panel across its width, and seat it without compressing the media edge.

Sibling check. The Ultra 7.50 in the same catalog family runs 64 x 149 panels. Same length, different width, and the sets do not interchange. Confirm the nameplate, or measure one ceiling opening, before ordering either set.

Exhaust side. The distributor listing does not document this model's exhaust arrangement. Downdraft exhaust media is matched to the measured pit or grid opening, in fiberglass arrestor or pocketed paper depending on your paint volume. One measurement locks it in for every future order.

Loading behavior. A larger ceiling area spreads intake loading across more media, so ceiling sets on this booth tend to outlast exhaust media by a wide margin. Watch the exhaust manometer; the ceiling change is usually triggered by visible loading or sagging face velocity rather than the calendar.

An Ultra 2000 in a collision shop almost always operates under the EPA 6H area-source rule, which ties compliance to spraying in a ventilated, filtered booth maintained to the manufacturer's specification. When the original documentation is gone, a dated record of filter changes matched to catalog fitment is the practical substitute inspectors accept as maintenance evidence. OSHA 1910.94(c) expects design airflow to be maintained at the working zone, which loaded media undercuts, and NFPA 33 expects paint arrestors changed before overspray buildup becomes combustible loading around the exhaust path.