Gas and Oil Furnaces MODEL XB80 Quality comfort, built to last XB Single Stage Furnaces When your furnace is built to last, your family sees the benefits in comfort and utility cost savings year after year. The XB80 is designed to help you meet both those goals, giving you the peace of mind that comes from choosing Trane quality. MODEL XB80 features: Efficient performance The XB80 features up to 80% efficiency. 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.