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INFLEX FLEXIBLE DUCTS

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FLEXIBLE INSULATION DUCTS
ENVIRMNETAL FRIENDLY AHU & HVAC SOLUTIONS

Top quality solutions for all of your HVAC construction needs. Two distinct cores serve the pressure requirements of residential through medium commercial systems.

INFLEX offers flexible duct products for both residential and commercial HVAC applications that provide the most economical solution to your air-handling needs.

INFLEX ducts are Formaldehyde-Free insulation for improved indoor air quality.

 Available as –

Insulated Flexible Duct , Non Insulated Flexible Duct

Flexible Duct

  • Flexible ducting, also known as ‘flex’, is used to transport heated or cooled air from the unit into your home and vice versa through the grilles or diffusers.
  • Flexible duct is very convenient for attaching supply air outlets to the rigid ductwork. It is commonly attached with long zip ties or metal band claps.
  • Flexible ducts can speed installation by reducing the number of joints in a run and eliminating the need for elbows and offsets.
  • It is a multiply aluminium, polyester laminated ducting with an en-capsulated high tensile steel wire helix.
  • Easy to install over either round or oval ducting due to high flexibility.
  • No special tools required for cutting or fixing.
  • In case of a fire no toxic gases are emitted.
  • The products have been tested on fire resistance.
  • Low costs due to faster installation, transport and logistics.

Insulated Flexible Duct - Technical Details:

Inner Construction Material  Strong polyester film laminated and encapsulated with a heavy, corrosion resistance steel wire helix forms the inner core and supports a thick blanket of fibreglass insulation.
Outer Construction Material The outer vapour barrier is a bi directional reinforced metalized vapour barrier that will not unravel.
Insulation Thickness 25 mm ,38 mm and 50 mm
Insulation Density 16 Kg/m3 and 24 Kg/m3
R –value 4.2 , 6 and 8    ft2oFhr/BTU
Max. Positive pressure rating Diameter 4’’ to 16’’ - 10’’ WG
Diameter 18’’ to 20’’ -6’’ WG 
Max. Negative pressure Diameter 4’’ to 20’’ – 1/2’’ WG
Max. Velocity 5000 fpm
Temperature Range -20oC to 250 oF
Fire properties Fire spread index – less than 25
Smoke developed index – less than 50
Vapour Transmission rating 0.1 US Perm
Standard Length 16.4 ft (5 meter)
Diameter - ID 4’’ to 20’’
Insulated yes

Non Insulated Flexible Duct – Technical Details :

Inner Construction Material  Strong polyester film laminated and encapsulated with a heavy, corrosion resistance steel wire helix forms the inner core.
Outer Construction Material The outer vapour barrier is a bi directional reinforced metalized vapour barrier that will not unravel.
Max. Positive pressure rating Diameter 4’’ to 16’’ – 10’’ WG
Diameter 18’’ to 20’’ -6’’ WG 
Max. Negative pressure Diameter 4’’ to 20’’ – ½’’ WG
Max. Velocity 5000 fpm
Temperature Range -20oC to 250 oF
Fire properties Fire spread index – less than 25
Smoke developed index – less than 50
Vapour Transmission rating 0.1 US Perm
Standard Length 16.4 ft (5 meter)
Diameter – ID 4’’ to 20’’
Insulated No

Application and benefits:-

  • INFLEX insulated flexible ducts are thermally insulated fully lined designed for low to medium pressure cooling & heating HVAC systems. It can be used in either supply or return sections & provides economical means for handling misalignment between system components & ducting around obstacles where fabricated & fitted GI ducts are difficult & costly to use.
  • It is equally suitable for new jobs or retrofit works and especially useful for system extensions or changing conditioned zones, now or in future. Compliance to NFPA standards allows installing length longer than 14” limitation applying to connectors for fire & flame safety in ducting systems.
  • It is a highly efficient part of total duct system because the smooth liner, the ample insulation and tough outer vapour barrier provide excellent air flow, thermal insulation and double air seal.
  • It's widely used in projects where installation of the ducts is to be done swiftly, & for short term installation etc.

Features:-

INFLEX strives to satisfy not only contractors, engineers, consultants but furthermore the end users & their Indoor Air Quality (IAQ).

  • Highly energy efficient & thermally stable
  • Good acoustic performance
  • Fire retardant materials used in construction
  • Easily expands over fittings
  • Even airflow
  • Easy installation
  • Low maintenance
  • Durable finish
  • Weather resistance
  • Tear and puncher resistance
  • Minimum friction loss
  • Highly resistant to corrosion and micro organism
  • Light weight
  • Convenient packaging & handling
  • Extremely strong
  • Corrosion Resistance
  • High tensile strength
  • Dimensionally strong
  • Weather resistance
  • Tear and puncher resistance
  • Minimum friction loss
  • Highly resistant to corrosion and micro organism