Trane and Amana are both known for making the best air conditioner models in the market. With excellent features and sturdy build, both the brands have created their particular places in the market. But if you want to have excellent warranty coverage for your air conditioner, you can incline towards Amana. With its 10-year part replacement warranty and labor and a lifetime warranty of compressor and heat exchanger- Amana is a reliable AC brand to buy.