Trane manufactures a full line of air conditioners, ranging in SEER (Seasonal Energy
  Efficiency Ratio) from 10.0 to 19.5. With a SEER rating of up to 19.50, the XL19i
  offers unbeatable energy efficiency and therefore, lower operating costs.
  The XL19i has dual Climatuff® compressors that allow for two-stage cooling. And
  because it operates at a low speed (first stage), most of the time you get quiet,
  efficient and extremely comfortable air conditioning for your home.

                     
  Trane has the industry-leading 10-year limited warranty on both compressors, the
  unique Spine Fin™ outdoor coil and all functional parts. We'll even cover the
  furnace, air handler and thermostat for 10 years if they are installed at the
  same time.
                                                      

  -  Ten-Year Limited Warranty on compressors and outdoor coil

  -  Ten-Year Limited Warranty on internal functional parts on units installed
      after October 1, 2001 and manufactured after January 1, 2000

  -  Optional Extended Warranties available. Extended warranties cover labor,
      refrigerant, and other costs not covered by Manufacturer's Limited Warranty,
      so you are covered for all parts and labor for the lifetime of the
      warranties

  -  If you have an indoor gas furnace, coil or air handler installed at the same
      time as a XL14i outdoor condensing unit those units will be covered for ten
      years on internal functional parts as part of the outdoor unit system warranty.