Lynden Door IC Series Commercial Interior Doors

The IC Series (presumably Interior Commercial) delivers commercial-grade interior doors with fire ratings up to 90 minutes and unique ventilated core options. These doors target healthcare, education, and office projects where ADA compliance and fire ratings matter more than decorative details.

Fire-Rated Core Options Drive Commercial Applications

The IC Series offers four fire-rated core options: 20-minute Category A/B rating, plus 45-, 60-, and 90-minute Category A ratings. That 90-minute rating opens doors (literally) to corridor applications in hospitals and high-rise buildings where code demands serious fire resistance.

The series includes standard hollow core and solid core options alongside these fire-rated cores. Thickness options come in both 1-3/8” and 1-3/4”, with the thicker option typically required for higher fire ratings and commercial hardware.

Size range runs from 2’0” to 4’0” widths standard, with special orders up to 4’8” wide. Heights include 6’8”, 7’0”, and 8’0”. Those 8-foot heights accommodate modern commercial ceiling heights without custom orders.

Ventilated Core Technology for HVAC Integration

The ventilated core option allows airflow through the door — air flows in from one side, through the door core and out the opposing side. This solves a real problem in commercial buildings where HVAC balance requires air transfer between spaces but privacy demands closed doors.

Lab-tested baffling and resonators integrated into the door core block high and low frequency sound while maintaining airflow. That’s engineering worth paying for in healthcare settings where patient privacy meets ventilation requirements.

Compatible styles include StileLine, ReDiscovery, FineLine, wood veneers, Elemental, prefinished and primed hardboard door styles. The ventilated core technology works across multiple aesthetic options.

ADA-Compliant Construction Details

The 10-inch bottom rail meets ADA requirements for kick plate height and accessibility standards. The 6-inch stiles easily accommodate standard hinges and locks without special machining.

Doors are trimmable up to 1-inch on each end (top/bottom) thanks to wide rails. Field trimming capability matters when installers face out-of-square openings or height adjustments.

Route lines are positioned to avoid interference with standard hardware locations. Smart design that prevents callbacks from hardware conflicts.

Specifications

Specification	Value	Source
Fire Ratings	20-min (Cat A/B), 45/60/90-min (Cat A)	manufacturer
Core Options	Hollow, Solid, Fire-Rated, Ventilated	manufacturer
Thickness	1-3/8”, 1-3/4”	manufacturer
Width Range	2’0” to 4’0” standard, up to 4’8” special	manufacturer
Height Options	6’8”, 7’0”, 8’0”	manufacturer
Bottom Rail	10 inches (ADA compliant)	manufacturer
Stile Width	6 inches	manufacturer
Trimming Allowance	1 inch each end	manufacturer
Warranty	1-Year Limited Interior	manufacturer

Bottom Line

The IC Series earns consideration for commercial projects needing fire ratings beyond the standard 20-minute door. The ventilated core option solves real HVAC challenges in healthcare and office buildings. Doors target healthcare, education, retail, and office applications where code compliance trumps curb appeal.

The smooth, bevel-grooved MDF surface won’t win design awards, but it handles commercial abuse and accepts field painting. For Montana commercial projects meeting current fire codes, the 45- to 90-minute ratings provide necessary options. The ventilated core technology addresses Montana’s variable climate control needs without compromising acoustic privacy.

Frequently Asked Questions

What fire ratings does the IC Series offer?

The series provides 20-minute Category A/B rating for residential applications, plus 45-, 60-, and 90-minute Category A ratings for commercial corridor and stairwell applications.

Can IC Series doors be trimmed on site?

Yes, doors can be trimmed up to 1 inch on the top and bottom edges thanks to the wide rail construction. This field adjustability helps with out-of-square openings.

What’s the warranty on IC Series doors?

Lynden Door provides a 1-Year Limited Interior Warranty covering manufacturing defects. Standard commercial warranty terms for this product category.

How does the ventilated core maintain privacy?

Lab-tested baffling and resonators built into the door core block both high and low frequency sounds while allowing air to pass through. The technology balances HVAC needs with acoustic privacy requirements.