The Napoleon Ducted Heat Management Side Sleeve for 38/50/62/74" Direct Vent Fireplaces is the ideal accessory for enhancing the heat efficiency of your fireplace. Designed to work seamlessly with your Napoleon fireplace, this side sleeve helps direct warm air into adjacent rooms, ensuring consistent and even heat distribution throughout your home. Its durable construction and easy installation make it a practical upgrade, improving comfort while reducing energy waste. With the Napoleon Ducted Heat Management Side Sleeve, you can maximize your fireplace's performance and create a more efficient and cozy living environment.