
76 VAV-PRC011M-EN
Dual-Duct VAV Terminal Units
Mechanical Specifications
Dual-Duct Terminal Unit
Model VDDF
Casing
22-gage galvanized steel.
Hanger brackets provided.
Agency Listing
The unit is UL and Canadian UL. Listed as a room air terminal unit. Control # 9N65.
AHRI 880 Certified.
Insulation
1/2" (12.7 mm) Matte-faced Insulation—The interior surface of the unit casing is acoustically and
thermally lined with ½-inch, 1.5 lb/ft3 (12.7 mm, 24.0 kg /m3) composite density glass fiber with a
high-density facing. The insulation R-Value is 1.9. The insulation is UL listed and meets NFPA-90A
and UL 181 standards. There are no exposed edges of insulation (complete metal encapsulation).
1" (25.4 mm) Matte-faced Insulation—The interior surface of the unit casing is acoustically and
thermally lined with 1-inch, 1.0 lb/ft3 (25.4 mm, 16.0 kg /m3) composite density glass fiber with a
high-density facing. The insulation R-Value is 3.85. The insulation is UL listed and meets NFPA-90A
and UL 181 standards. There are no exposed edges of insulation (complete metal encapsulation).
1" (25.4 mm) Foil-faced Insulation—The interior surface of the unit casing is acoustically and
thermally lined with 1-inch, 1.0 lb/ft3 (25.4 mm, 16.0 kg /m3) density glass fiber with foil facing. The
insulation R-Value is 3.85. The insulation is UL listed and meets NFPA-90A and UL 181 standards
as well as bacteriological standard ASTM C 665. There are no exposed edges of insulation
(complete metal encapsulation).
1" (25.4 mm) Double-wall Insulation—The interior surface of the unit casing is acoustically and
thermally lined with a 1-inch, 1.0 lb./ft3 (25.4 mm, 16.0 kg/m3) composite density glass fiber with
high-density facing. The insulation R-value is 3.85. The insulation is UL listed and meets NFPA-90A
and UL 181 standards. An interior liner made of 26-gage galvanized steel covers the insulation. All
wire penetrations are covered by grommets. There are no exposed edges of insulation (complete
metal encapsulation).
3/8" (9.5 mm) Closed-cell Insulation—The interior surface of the unit casing is acoustically and
thermally lined with 3/8-inch, 4.4 lb/ft3 (9.5 mm, 70.0 kg/m3) closed cell insulation. The insulation
is UL listed and meets NFPA-90A and UL 181 standards. The insulation has an R-Value of 1.4. There
is complete metal encapsulation.
Primary Air Valves
Table 47. Air valve combinations available
Air Valve Size in. (mm)
Cooling
Cataloged Airflow cfm
(L/s)
Cooling
Air Valve Size in. (mm)
Heating
Catalog Airflow cfm
(L/s)
Heating
05 (127) 350 (165) 05 (127) 350 (165)
06 (152) 500 (236) 05 (127) 350 (165)
06 (152) 500 (236) 06 (152) 500 (236)
08 (203) 900 (425) 06 (152) 500 (236)
08 (203) 900 (425) 08 (203) 900 (425)
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