Atmosphere® Rigid Plenum Liner

Tough and resilient, delivering an optimal combination of efficient sound absorption, low thermal conductivity and minimal air surface friction. With a black mat facing, it gives the airstream a smooth, tough surface that resists damage during installation and operation.

Applications

HVAC

Certifications

Product Features

Proven Performance

Delivering proven strength against air velocity testing at over 140 miles/hour — 12,500 ft./min. — for trusted temperature and sound control in metal ducts.

ECOSE Technology

Our patented, bio-based binder is a smarter alternative to using phenol formaldehyde. It’s been foundational in our commitment to sustainability.

Quality Design

This 3-lb/cubic ft. duct liner board is designed to withstand damage during installation and operation. It’s fire-resistant, non-corrosive and helps prevent bacterial growth.

Product Details

Technical Data

Technical Data
Property (Unit)	Test	Performance
Corrosiveness	ASTM C665	Does not accelerate corrosion of steel
Corrosion	ASTM C1617	Pass
Air Velocity	ASTM C1071	Max. 5,000 ft./min. (25.4 m/sec.) Tested to 12,500 ft./min. (63.5 m/sec.)
Maximum Service Temperature	ASTM C411	250° F (121° C), Max. thickness 3"
Mold Growth	ASTM C1338, ASTM G21	Pass
Water Vapor Sorption (by weight)	ASTM C1104	3% or less
Surface Burning Characteristics (flame spread/smoke developed)	ASTM E84, CAN/ULC S102, UL 723	UL/ULC Classified FHC 25/50

Forms Available

Forms Available*
Thickness	Density	Width	Length
1"	3.0 PCF (48 kg/m³)	24" (610 mm), 48" (1219 mm)	48" (1219 mm)
1½"			96" (2438 mm)
2"			36" (914 mm)
			72" (1829 mm)
			96" (2438 mm)
			120" (3048 mm)

*Consult Price Book for minimum order quantities. Pallets available on made-to-order basis.

Thermal Conductance “C” and Resistance R

Thermal Conductivity “C”¹ and Resistance “R”² \| ASTM C177
Mean Temperature 75° F (24° C)
Product		Conductance "C"	Resistance "R"
3.0 PCF (48 kg/m³)	1" (25 mm)	0.23 (1.31)	4.3 (0.76)
	1½" (38 mm)	0.15 (0.85)	6.5 (1.15)
	2" (51 mm)	0.11 (0.62)	8.7 (1.53)
4.25 PCF (68 kg/m³)	1" (25 mm)	0.225 (1.56)	4.4 (0.78)
	1½" (38 mm)	0.15 (0.85)	6.6 (1.16)
	2" (51 mm)	0.11 (0.62)	8.9 (1.56)

¹The lower the value, the better the performance.²The higher the value, the better the performance.

Sound Absorption Coefficients

Sound Absorption Coefficients \| ASTM C423, Type A Mounting
Octave Band Center Frequency (cycles/sec.)
Product		125	250	500	1000	2000	4000	NRC
3.0 PCF (48 kg/m³)	1" (25 mm)	0.13	0.24	0.56	0.83	0.92	0.98	0.65
	1½" (38 mm)	0.19	0.41	0.89	1.02	1.03	1.04	0.85
	2" (51 mm)	0.33	0.67	1.07	1.07	1.03	1.06	0.95
4.25 PCF (68 kg/m³)	1" (25 mm)	0.06	0.24	0.69	0.99	1.05	1.02	0.75

Friction Loss and Mechanical Fastener Location

Friction Loss \| Inches of Water Per 100'
ft./min.	Hydraulic Diameter
Velocity	10"	16"	24"	32"	40"	72"	100"
500	0.056	0.031	0.018	0.013	0.010	0.005	0.003
600	0.080	0.044	0.026	0.018	0.014	0.007	0.004
700	0.108	0.059	0.035	0.025	0.019	0.009	0.006
800	0.140	0.077	0.046	0.032	0.024	0.012	0.008
900	0.176	0.096	0.058	0.040	0.031	0.015	0.010
1000	0.216	0.118	0.071	0.050	0.038	0.018	0.012
2000	0.845	0.463	0.278	0.194	0.147	0.071	0.048
3000	1.887	1.034	0.620	0.432	0.328	0.159	0.106
4000	3.340	1.831	1.097	0.765	0.580	0.281	0.188
5000	5.206	2.854	1.710	1.193	0.904	0.438	0.293

Mechanical Fastener Location
Velocity per ft./min. (m/sec.)	0-2500 (0-12.7)	2501-5000 (12.7-25.4)
A. From corners of duct	4" (102 mm)	4" (102 mm)
B. From transverse end of duct liner	3" (76 mm)	3" (76 mm)
C. Across width of duct, on centers (min. 1/side)	12" (305 mm)	12" (305 mm)
D. Across length of duct, on centers (min. 1/side)	18" (457 mm)	18" (457 mm)