IHPSV4.5ARSA | Attic Insulation Shield | 12" to 22" adjustable height | SV4.5" and 7.5" Concentric Vent | H3907 | IHP570440211SKU:H3907Inventory ID:03611712Select Item:Price: $246.00Quantity: Attic Insulation Shield must be installed when blown or loose-fill insulation is used, and is required for all attic installations. Supplied storm collar closes off top of shield. SV4.5RSA venting component is used on some Astria, Superior, and Lennox gas burning direct vent fireplaces. Check your model's Installation Manual for listed Secure Vent Components. Reviews Choose your rating12345