The latest addition to the Etri 300 family of brushless dc equipment
fans, the 337 produces 30% more airflow (up to 200cfm) from a frame size
marginally larger than the standard series frame of 120x120x38mm. The
pitch between fixing holes can be either 105 or 113mm, which enables a
337 retrofit without having to make structural alterations to the fan
mounting.
A new motor and improved impeller design is responsible for the higher
air flow, which is achieved at the same blade speed. This means that the
operating noise level is reduced for the same cooling effect. All models
in the range are available in 5, 12, 24 and 48V versions, from Aerco in
the UK.