Parker ATI Ultra II MERV 8 polyester filter media is used in HVAC air handling systems and paint spray booth air intakes and exhaust. Graduated-denier construction places larger fibers in an open upstream layer, followed by a denser layer of finer fibers. This arrangement promotes depth loading and high dust-holding capacity to support longer service life and fewer changeouts. A needled downstream layer forms a final barrier to catch dirt particles.

The media uses 100% dual-stage polyester fibers, with white on the air-entering side and a dense green layer on the air-leaving side. A heavy application of pressure-sensitive tack retains collected dirt, while a non-migrating tackifier is applied on the air-leaving side. The Ultra II specification lists paint overspray, including powder coating, waterborne paint and primer, as well as sanding dust applications. Media is available as blankets and bulk rolls.

• Media: 100% dual-stage polyester with graduated-denier construction.
• Airflow direction: white side entering; green side leaving.
• MERV 8; ASHRAE 52.2-2007 reference data for a 24 x 24-inch sample at 295 FPM: initial resistance 0.29 in. W.G.; final resistance 1.00 in. W.G.