Gas and Oil Furnaces MODEL XT90 Total warmth and comfort XT Single Stage Furnaces Whatever kind of heatingneed you have, from slow, gentle warmth on a chilly day to high-performance heating when the temperature really drops, the XT90 can provide energy-efficient comfort that you want. MODEL XT90 features: Efficient performance The XT90 features a 90%+ AFUE (annual fuel utilization efficiency). Comfortable, even heating High efficiency blower motor provides a consistent flow of warm, comfortable air, while operating quietly and efficiently. Durable construction Materials for all components are tested again and again for long-lasting performance and reliability. Better indoor air Add a Trane Air Cleaner to your system for filtering that removes more dust, pollen and other irritants throughout your entire home for a cleaner, healthier, more comfortable home.