Quiet Pack Twin Fan Acoustic In-Line Box Fan 125mm
- Air volumes up to 1.07m3/s
- Suitable for external pressures up to 450Pa
- Designed to suit duct diameters from 100 to 400mm
- Operating temperatures up to 40°C
- Speed controllable
- Quality assurance to BS EN ISO 9001:1994
- Performance tested to BS848 Part 1 1980
Product Overview
The Quiet Pack Twin in-line fans are as supplied from Roof Units, designed around a high performance centrifugal impeller, offering a highly efficient, quiet and compact twin in-line acoustic fan.
The Quiet Pack Twin fan range is manufactured from prime quality galvanised sheet steel, ensuring a robust twin in-line fan for those tough site conditions.
Casings are suitable for internal mounting only and internally treated with an ‘O’ class rated acoustic foam, which offers the benefits of excellent low level duct bound and breakout sound levels, in addition self extinguishing properties, zero burn rate, resistant to ignition, and no toxic fumes.
Quiet Pack Twin fans are suitable for circular ducting ranging in sizes 100, 125, 150, 160, 250, 315, and 400mm, with air volumes up to 1.07m3/s and pressure development of up to 450Pa.
They are specially designed to allow the unit to be mounted via drop rods or anti vibration mounts, ensuring a quick and easy solution to installation with all units fitted with backdraught shutters to prevent air flow returning back through the system during shutdown periods.
Impellers
The motor and backward curved impeller is factory matched, statically and dynamically balanced on precision machines, to ISO 1940 Grade 6.3., to give quiet, vibration free running.
Motors
Motor insulation Class B, suitable for operating temperatures from -15°C up to +40°C and atmospheres up to 95% RH.
All sizes are suitable for speed control by electronic or voltage reduction. Vent-Axia would recommend that a voltage reduction Auto Transformer speed controller is used with all units to ensure minimum noise levels during speed control and to eliminate any possibility of harmonic noise levels which may occur when using electronic speed controllers at lower speeds.
Performance
The fan performance is in accordance with tests to BS848 Part 1 1980, with the fan sound levels measured in a reverberant chamber in accordance with BS848 Part 2 1985.
Quality Assurance
Design and manufacture is in accordance with the standard for quality management systems BS EN ISO 9001:1994.
Product Downloads
Installation Instructions
Catalogue Pages
Accessories
Circular Attenuator 300mm Length 125mm
- Low cost - exceptional performance
- Ex stock availability
- Sheet steel casing and end plates
- 30 minute fire rating as standard
- Fitted spigot for direct connection to circular ductwork
Circular Attenuator 600mm Length 125mm
- Low cost - exceptional performance
- Ex stock availability
- Sheet steel casing and end plates
- 30 minute fire rating as standard
- Fitted spigot for direct connection to circular ductwork
Circular Attenuator 900mm Length 125mm
- Low cost - exceptional performance
- Ex stock availability
- Sheet steel casing and end plates
- 30 minute fire rating as standard
- Fitted spigot for direct connection to circular ductwork
125mm Round Pyrocheck Intumescent Fire Dampers
- Suitable for air transfer in doors and partitions
- Complete seal achieved in approximately five minutes when tested in accordance with BS 476 part 20 & 22
- UV Stabilised material UPVC
- Pyrocheck offer much lower resistance to airflow compared to traditional designs
- Independently tested to BS 476 Part. 22; fire integrity of 68 mins
Unitex Wall Terminal Standard Louvre 125mm Diameter, 280mm Length
- External weather louvre, wall sleeve and duct connection spigot in one unit
- Satin anodised louvre gives full weather protection
- Epoxy powder coated finish, weather louvre available as optional extra
- 280mm or 80mm wall sleeve section
- Spigot connections from 100mm to 400mm
2 Amp Single Phase 5 Step Auto Transformer
- Single Phase, 5 step auto-transformer speed controller
- Low motor noise - no magnetic hum
- ON/OFF Switch