Manufactured by S&P and continuing their range of quiet fans, the CAB range of acoustically lined cabinet fans are specifically designed to provide extract ventilation solutions for noise sensitive environments. The range comprises of six nominal sizes. All models incorporate single phase, 230V 50Hz, direct drive low pressure centrifugal fans available in two (2) or four (4) pole speeds. All models are supplied with a remote mounting wiring outlet box to facilitate installation and connection to external controls.
These are slightly more expensive than the Rucks, but have better acoustic properties and build. Recommended..
Air volume performance ranges from 200 up to 3,950 m3/hr.
APPLICATIONS
The UPA range are suitable for many general ventilation applications where the noise level of the ventilation system is of particular importance. Typical applications would include ventilation systems for:
- Commercial offices.
- Restaurants and cafes.
- Libraries and public buildings etc.
CONSTRUCTION
Casing
The fan casings are manufactured from heavy gauge galvanised sheet steel and internally lined with a dense Melanex (M1 Type) acoustic insulation. All models incorporate inlet and discharge circular duct connection flanges with integrated rubber air seal. The specific design of the products enables a cover to be removed and the motor / impeller assembly accessed without the requirement of removing the fan casing from the ducting. This UPA fan cover is supplied as standard with “quick-fix” fixings to enable fast removal or fitting without tools. All models are also supplied with four mounting feet to facilitate any ceiling, wall or floor mounting installation.
Motor / Impeller
All models incorporate a single phase, 230V 50Hz, direct-drive low pressure forward curved centrifugal fan (with scroll). All motors included in the UPA range are of, “enclosed,” type and are fully speed controlable using voltage regulation.

After much work given on the noise figures for these fans, it seems that they compare favorably with the Ruck fan, being quieter by a few decibels. They are also built a little more sturdily.

Noise figures. (Breakout noise at normal operating point)
125mm - 24dB(A) @ 3m
160mm - 30dB(A) @ 3m
200mm - 31dB(A) @ 3m
250mm - 32dB(A) @ 3m
315mm - 34dB(A) @ 3m
400mm - 37dB(A) @ 3m

Download specifications HERE

See our fan comparison chart HERE for more info.