- Furnace Sail Replacement: designed for high temperatures and continuous use, this replacement sail provides reliable performance and long lasting durability for your RV, car, or truck heating system. - Professional Low Air Run Kit: a low air run kit designed for efficient ventilation and optimal heating in your vehicle, helping maintain comfortable temperatures in cold weather. - Wide Vehicle Compatibility: Engineered for versatility, this kit is suitable for cars, SUVs and trucks, making it an essential accessory for various vehicle heating systems. - Quality Construction: Made from high quality materials, the set provides excellent durability and resistance to wear and tear, ensuring constant heat output in all conditions. - Use scenarios: - Use on winter road trips in an RV to keep the living area warm - Use during daily commutes in cold climates to maintain passenger comfort - Use for fleet maintenance on service or delivery vehicles needing reliable heat