NK4 Warm

Champion Door offers many different alternatives for industrial installations and commercial properties, always taking into account the special circumstances of each doorway.

The tight structure of the NK4 Warm door saves energy and increases employee comfort by preventing draught. NK4 Warm industrial door is a 2-ply fold-up partition like NK2 Double, except that two additional insulation layers for heat and noise insulation have been attached. NK4 Warm’s R-value is 7,99 ft² °F h/BTU and even up to 9,96 ft² °F h/BTU with additional insulation. Good thermal insulation, minimal condensation of moisture on the door surface makes the door highly reliable even in Arctic conditions.

NK4 Warm’s functional applications include aircraft hangers, shipyard halls, bridge crane openings and factory sheds. NK4 Warm’s excellent sound level attenuation properties also make it an excellent choice as an interior space divider. The doors are nearly maintenance-free and can be equipped with thermal insulation, soundproofing and burglary protection. No size limitations.


Serge Ferrari color chart

Scantarp color chart



NK4 Warm, technical information

General information

  • Meets requirements of UFGS-08 34 16.20
  • Wind load: any windload
  • Door size: no size limitations


  • Mildew- and UV-resistant
  • Weight 0,18 lbs/ft²
  • Equipped with thermal insulation
  • Tear strength: 50 / 50 daN
  • Tensile strength: 420 /420 daN / 2 inch
  • Heat and frost resistance +158 to -40 °F
  • Best functionality to -31 °F, arctic fabric to -76 °F
  • Fabric options: windows, Translucent, arctic, soundproofing, extra thermal insulation, security burglar protection

 Other materials and surface treatments

  • Upper console - hot-dip galvanized steel
  • Side guides - anodized aluminum profile
  • Lower (bottom) beam - hot-dip galvanized steel
  • Horizontal beams - aluminum
  • Mullions - sandblasted, primed and painted (2 layers)
  • Other components: aluminum, nylon, galvanized and stainless steel

Electrical system

  • Enclosure class: NEMA 3 or higher
  • Phase: 3 phase
  • Operating voltage: 440 V
  • Control voltage: 24 V
  • Motor rating: 1 to 5 kW/motor
  • Torsion: from 400 Nm to 4800 Nm/motor

Warm value (door leaf)

R-value 7,99 ft² °F h/BTU up to 9,96 ft² °F h/BTU with additional insulation

Sound level

25 dB ->

rakenne warm eng




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