Airtec Products Corp    Fall River, MA 02720
May 16, 2011 Rooftop RD-Series ducting and support system is designed for multiple linesets used with variable refrigerant flow multi-split air-conditioning systems. Product has 20 ga roll-formed sheet metal lineset casing with anti-corrosive, scratch-resistant ZAM® coating. Including 90° and 45° ells, vertical ells, tees, crosses, wall flanges, end caps, reducers, and couplers, series is available in 7 models ranging from RD150, 5 7/8 x 4 3/8 in. models to RD900H, 35 3/8 x 9 7/8 in. versions.

Airtec Products Corp    Fall River, MA 02720
Mar 17, 2010 Made specifically for North America, Fortress(TM) lineset covering system is intended for mini-splits or ducted split air conditioning systems. Extruded PVC lengths and injection-molded fittings are resistant to effects of UV and weather, and sweep elbows accommodate long radius 90° bends. Full 8 ft lengths reduce joints and waste, while 2 deep profiles - 3.5 and 4.5 in. - respectively accommodate standard and heavily-insulated or multiple linesets.

K&B Duct    Greensboro, NC 27409
Feb 14, 2007 Designed to hasten installation and facilitate system modification, Clamp-Together Duct is available in 24-10 gauge thick galvanized or stainless steel in 1 in. dia increments from 3-24 in. It is assembled with lifetime-guaranteed Forever Clamp and suited for any negative-pressure ventilation system up to 40 in. wg with entrained dust, sand, fumes, mist, smoke, chips, or trim scrap. Adjustable sleeves and components enable field fitting to any length.

Harvel Plastics, Inc.    Easton, PA 18044 0757
Apr 19, 2002 Corzan(R) CPVC duct systems exhaust volatile fumes and exhibit resistance to chemical attack. Manufactured in pipe sizes from 6 to 24 in. diameters, ducting offers working temperature of 200 deg F and fire resistant properties. It can be connected with fume scrubbers or other emission control equipment. Applications include pulp and paper, metals finishing, water and wastewater treatment, electronics, and chemical processing.