With an innovative sealing design, this Set reduces by up to 20%, creating a quieter environment It also improves airflows efficiency by 30%, ensuring freshness and well circulated air for healthier living conditions The upgraded foam panel 50% better insulation than standard option, maintaining tight seals even in extreme heat The guard enhances weatherproofing, rust and leaks while fitting pipes (5 " –5.9 " Diameter This ventilation Set features high insulating foam panels that effectively block external heat, keeping indoor spaces cool and comfortable while enhancing air conditioning efficiency The triple layer structure (comfort insulation + foam panel + waterproof) boosts thermal insulation for optimal Ideal for bedrooms and living rooms to enhances cooling comfort, especially for children and seniors Also perfect for camping or picnics, providing ventilation in cars or tents for outdoor Made from and insulating foam, this Set resists and wear for long lasting use Its easy installation fits most sliding / hung window (16.5 " 47 ") And securely seals exhaust hoses to debris entry