Inquiry (采购产品): Before HVAC filter photos I am a member of Illinois Association of School Business Officials and need to present IAQ seminar mid July. As part of my presentation, I am searching for "bad" filter examples. I am not interested in location or customer name, but "before" photos of poor filter conditions. Please call my cell phone to discuss further. Looking for photos of filters for air handling units, package rooftop units and classroom unit ventilators. **** Hidden Message ***** Doc Kotecki Itasca, IL 60143 USA Company: Energy Systems Group Phone: 847-951-7603 E-mail: dkotecki@energysystemsgroup.com **** Hidden Message ***** dkotecki@energysystemsgroup.com
