Among other highly air conditioner brands RUNTRU by Trane is widely considered as an economical brand in both ways cooling efficiency and price. RUNTRU by Trane offers extended warranties, including the option on its top-notch air conditioner and split air conditioner for a lifetime warranty and RUNTRU by Trane air conditioner usually work for long time with great efficiency if regularly maintained. SEER in air conditioner plays a very important role as you can save allot on your utility bills with the installation of higher SEER air conditioning unit in your home. SEER determines the systems’ efficiency–how much energy turns into cool air and how much is wasted–so it also large determines into your energy bills. It’s a bit complicated to convert SEER into easy-to-read numbers, but Energy Star has a helpful Excel spreadsheet you can use to calculate savings from different SEER ratings and our home comfort advisor is always there for you for help on this or any other air conditioning concerns.