What the Shroud on the AME 400mm Actually Does
Most circulation fans throw a narrow, fast jet that punches a hole through the room and leaves dead air beside it. The shroud here works the other way. It draws air in from behind the fan as well as through it. A slower, wider column carries further and mixes more of the room per unit of energy. Output is 2,660 m³/h, roughly 1,565 CFM, at zero static pressure, on 208-240V single phase.
Running a Horizontal Air Flow Fan at Part Speed
Dramm designs these to run turned down. Around 40 to 60 percent of maximum is the usual setting for steady circulation, with headroom to push harder as the canopy fills in. A variable speed regulator is what makes that possible, and many of them accept an input from a climate controller so the room adjusts itself. The supply is worth flagging here. Single phase at that voltage is not a standard wall outlet, so the electrical work needs planning alongside the layout. The motor is sealed inside the housing, which is what lets it live in a humid greenhouse.
Key Features
- 2,660 m³/h at 0 Pa: About 1,565 CFM of horizontal circulation.
- Shrouded Housing: Pulls air from behind the fan, throwing a wider column further.
- Sealed Motor: Enclosed in the housing, suited to humid greenhouse air.
- 208-240V Single Phase: Shared across the AME range, not a 120V outlet.
- Variable Speed Ready: Built to run at 40 to 60 percent for steady circulation.
- Momentum Over Speed: Mixes the room rather than blasting one row of plants.
- Part of a Five-Size Range: 300, 350, 400, 450 and 500mm share the same design.
Technical Specifications
| Specification | Value |
|---|---|
| Fan Size | 400 mm |
| Airflow at 0 Pa | 2,660 m³/h (about 1,565 CFM) |
| Voltage | 208-240V, single phase |
| Housing | Shrouded, anti-corrosion |
| Motor | Sealed, high efficiency |
| Speed Control | Variable, via AME regulator |
| Model | WIF 400/4 |
| Range Sizes | 300, 350, 400, 450, 500 mm |