Gas and Oil Furnaces MODEL XR90 Efficient, single-stage performance XR Single Stage Furnaces The XR90's efficient performance means more of your utility costs actually go towards heating your home. MODEL XR90 features: Efficient performance The XR90 features a 91%+ AFUE rating. 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.