Amazingly, no. Most commercial offices have fiberglass inside the ducts because it saves them more money. But the sealant breaks down over time and air turbulen

Amazingly, no. Most commercial offices have fiberglass inside the ducts because it saves them more money. But the sealant breaks down over time and air turbulence makes the fiberglass fly. Larger particles cause symptoms like an allergic reaction, smaller particles can cause asbestosis if they are found in large numbers, though estimates so far indicate this is unusual. But it still seems stupid that we're pumping fiberglass throughout our offices. (To say nothing of mold/mildew if the fiberglass gets wet...)