Economical fiberglass air filter for everyday dust and lint capture in residential HVAC systems. The one-piece brown chipboard frame is sealed with hot-melt adhesive to resist corner separation, and a resinous bonding agent gives the spun-glass media rigidity and resistance to compression.

• Nominal size: 20" x 30" x 1"
• MERV 4 rating for basic dust and lint filtration
• One-piece brown chipboard frame, hot-melt adhesive sealed
• Spun-glass fiberglass media bonded directly to the frame - no retainer needed
• Resinous bonding agent for rigidity and compression resistance
• Economical, environmentally friendly disposable filter