Insulated Heating and Air Conditioning Ducts

What is Ultra-Duct?

Insulated HVAC ductsUltra-Duct products are insulated air conditioning ducts made from reflective insulation for recreational vehicles, conversion vans and specialty vehicles. Consisting of a 1/8-inch-thick* polystyrene core sandwiched between two layers of aluminum foil, Ultra-Duct achieves outstanding airflow in space-constricted applications.

* Allow for variance of .063"

Why Use Ultra-Duct?

  • Reflective foil provides a barrier to radiant heat intrusion, enhances HVAC system performance
  • Thin wall material maximizes duct interior, increasing air output
  • Non-toxic
  • Fiberless
  • Tested & approved for Heat & A/C
  • Lightweight
  • Easy to install
  • Available pre-cut for easy fold and tape or fully assembled
  • Variety of standard sizes; custom sizes are our specialty
  • UltraDuct products are ideal for any space-limiting application

Ultra-Duct - Standard Sizes

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1.5" x 7" x 96" 1.75" x 8.5" x 96" 2" x 7.5" x 96' 2" x 8" x 96'


Compare ULTRA-DUCT with a competitive foam/foil structure

The Competition A comparison of ULTRA-DUCT to the competitors shows that ULTRA-DUCT will handle up to 11.4% more air flow.  ULTRA-DUCT


Total Cross Section Area: (2" x 8') = 16.0 in2 Total Cross Section Area: (2" x 8') = 16.0 in2
Wall Thickness: 1/4" Wall Thickness: 1/8"
Total Wall Cross Section: 1/4" x 20" = 5.0 in2 Total Wall Cross Section: 1/8" x 20" = 5.0 in2
Only 11.0 in(2) Remains for Moving Air! 13.50 in(2) Remains for Moving Air!
Over 20% MORE than the competition!


Ultra-Duct - Technical Information

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Product Description

Aluminum foil / 42# kraft / polystyrene foam / 42# kraft / aluminum foil.

Components Description

Foil: Boiling Point:
Melting Point:
Flammable Limits:
0.04 oz/ft3
Kraft: Flash Point (kraft): 450°
Polystyrene Core: Meets FDA Spec:
Tensile ASTM D638:
Title 21, CFR177.160
Modulus, 103 psi 480
GPa 3.31
Structure Data: Elongation:
Vicat Softening Point ASTM D1525:
Flammability Class:
FMVSS-302 Flame Test:
Burn Rate:

Foil Surface Reflectivity:
1.5% at break
200°F - 93°C
UL94, 94HB


For More Information

"You have great customer service. I received a call from Eric today, and we discussed my insulation options for 20 minutes. He was unaware that you had also reached out to me. I am very amazed how quickly you both responded." – Jack B.