Free residential service call with any repair during normal business hours

CSI Mechanical

   (704) 600-6267

Serving Shelby, NC Metro Since 2010


  • Capacity 9–24 MBH
  • Cooling efficiency up to 38 SEER
  • Heating efficiency up to 15 HPSF
  • Low ambient heating down to -22F
  • Available as heat pump only
  • ENERGY STAR® qualified options
  • Matched with 4MXW38 Single-Zone


The 4MXW38 ultra high-efficiency high wall indoor unit works as part of a ductless mini-split or multi-split system. This model offers a capacity of 9–24 MBH, cooling efficiency up to 38 SEER, heating efficiency up to 15 HSPF, and low ambient heating down to -22F. Mounted on the wall, this unit offers flexible, high-efficiency heating and cooling for quiet, precise comfort without the ductwork. Temperature settings can be managed via a handheld remote control and traditional wall-mounted digital controls for the system. Includes Energy Star® qualified options. This model is also available as a heat pump only.

Fall special 2023