Elta STDL400-1EC-R is an acoustically lined twin-fan unit for duty/standby ventilation and external mounting. This 400 mm model is configured as EC single phase, rectangular spigot. It is intended for commercial systems requiring duty/standby resilience, quiet operation and external mounting capability.
Elta STDL400-1EC-R features and benefits
- Twin EC fans provide run-and-standby resilience for important ventilation systems.
- An auto-changeover panel is included for changeover and duty-sharing control.
- The galvanised steel casing is acoustically lined to reduce breakout noise.
- Backward-curved impellers and EC motors provide efficient, controllable performance.
Model specification
- Manufacturer: Elta
- Range: Twinflow STDL
- Product code: STDL400-1EC-R
- Nominal size: 400 mm
- Configuration: EC single phase, rectangular spigot
- Warranty: 12-month manufacturer warranty
Check the performance, electrical, sound and dimensional information in the technical document before ordering. If you are replacing an existing fan, match the complete product code and electrical supply.
Choosing the correct Twinflow STDL fan
Confirm the required airflow and system resistance before selecting a fan. The duct connection, phase, motor type and any terminal-box or spigot suffix must also match the installation. A similar-looking model code can represent a different electrical supply or connection arrangement, so use the full code STDL400-1EC-R when comparing the fan with a schedule, drawing or existing unit.
DuctFix supplies ventilation equipment to installers throughout the UK. If the duty point or product code is uncertain, send us the required airflow, pressure and electrical supply and we can help identify the appropriate fan and compatible control before purchase.
Technical documents
Need help confirming the correct model or controller? Contact DuctFix or browse the Elta box fan range.









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