Commercial Sliding Doors


GT 1175 Whisper Slider

This ultra-quiet, high-performance entrance system has one of the lowest lifetime cost of ownership of any automatic door system on the market today! It is the ideal solution for almost all standard slide door applications. The Whisper Slider has recently been tested and approved for Class 1 Vertical Laminar Flow Clean Rooms making it suitable for critical applications, like computer centers and laboratories. Available with fixed sidelights, full breakout and pocketed construction (with or without transoms) it will accommodate virtually any door opening.


  1. Motorized belt-drive for silent operation
  2. Exclusive NABCO Series “U” Microprocessor provides increased efficiency and dependable service
  3. Three rocker switches and an optional keyed switch system offer easy door control
  4. Integral flush glaze framing systems provide a more attractive appearance and a larger clear viewing area
  5. Large urethane door rollers for smooth and long lasting operation
  6. Superior double mohair thermal brush on center style of doors provides continuous moisture break
  7. Adjustable thermal brush system on the bottom of the door adds extra life
  8. Extra duty anodized roller track for long lasting durability
  9. 2 header-mounted NABCO Acusensor 1B units are standard and provide more efficient, safer reliable door operation
  10. One holding beam
  11. Meets ANSI Standard 156.10 for power-operated pedestrian doors. UL, CSA and CSFM approved