- NF series door specifications:
- Premium fiberboard core for heat transmission control
- Keeps the side of the door not exposed to fire below 250 degrees Fahrenheit at 30 minutes into a fire test
- Premium 250 degree core
- Versus competitors 400 degree standard core
- 18 gauge standard
- Available in 14 and 16 gauges
- Fiberboard core standard
- R factor of 3.5
- U factor of.286
- Cold rolled steel standard
- Available in a60 galvannealed and g90 galvanized steel
- Mesker grey primer standard
- Available unprimed (galvanized and galvannealed) and factory prefinished in thousands of Sherwin Williams colors
- Flush face standard
- Available with a variety of lite kits, louvers, and panel designs including woodgrain
- Exclusive door design includes:
- Mechanically interlocking pan and lid design
- 7 gauge hinge reinforcements with an extra-long, high frequency top hinge
- Reinforcement standard
- Closer reinforcement standard
- Inverted top channel standard
- Available flush top
- Up to 3 hour fire rating available
- Built to meet and exceed ADA, ANSI, ASTM, and SDI standards. (ASTM E152 for heat transmission)