Doorway Dimensions and Mounting Height Parameters
The Euronics EAC 3 (3 Ft / 900 mm) air curtain is engineered for horizontal wall-mount installation directly above narrow entrance headers, retail doorways, and commercial single-leaf thresholds. The unit spans a physical length of 900 mm, designed to cover standard 3-foot door spans with a uniform downward air velocity of up to 21 m/s at the discharge nozzle. For optimal environmental barrier performance, install the unit at doorways with mounting heights up to 11 feet (under 11 ft). Mounting the air curtain at heights exceeding 11 feet compromises the air stream, reducing its 75% dust and insect rejection efficiency.
To guarantee complete thermal separation and draft resistance, ensure the air discharge nozzle aligns flush with the doorway frame. Positioning the unit too far back or off-center from the entrance opening permits conditioned air to escape and allows outdoor particulate ingress around door margins.
Chassis Fastening and Structural Support
The EAC 3 features a rigid mild steel (MS) housing with a protective powder-coated finish and has an overall net operational weight of 19 kg. Dimensions for the enclosure measure 900 mm in length, 230 mm in width, and 212 mm in height. Due to the kinetic forces generated by two internal electric motors turning three ABS centrifugal blowers across one single and one double shaft at speeds up to 2700 RPM, secure mechanical mounting is mandatory.
The unit must be anchored securely to masonry walls, structural concrete headers, or welded structural steel transoms capable of supporting static and dynamic shear loads. Use appropriate heavy-duty wall plugs or anchor fasteners matched to the wall substrate. Installers must maintain sufficient top and front intake clearances around the chassis grilles to prevent air starvation to the internal ABS blowers.
Electrical Integration and Automation Wiring
Electrical hookup requires connection to a standard single-phase AC power line infrastructure. The unit consumes 350 W of nominal electrical power (with a rated maximum input up to 410 W). Electrical line routing should integrate an accessible, dedicated dual-speed controller or selector switch to facilitate switching between high-speed operation (2700 RPM, producing a 70 dB peak noise profile) and low-speed operation (2100 RPM, operating down to 50 dB).
For automated cycle management, the EAC 3 supports integration with auxiliary hardware such as micro door limit switches or magnetic sensors. Note that sensors are excluded in the standard equipment package and must be procured separately. When paired with external sensors, the blowers cycle automatically upon door opening to preserve energy while maintaining climate control.
Technical Installation Summary
| Installation Attribute | Specification / Threshold |
|---|---|
| Applicable Door Width | 3 Feet (900 mm span) |
| Chassis Dimensions (L x W x H) | 900 mm x 230 mm x 212 mm |
| Unit Net Weight | 19 kg |
| Mounting Configuration | Direct Wall Mount (Horizontal) |
| Maximum Mounting Height | Up to 11 feet (below 11 ft) |
| Airflow Volume | 825 CFM |
| Nozzle Air Velocity | Up to 21 m/s |
| Electrical Phase & Wattage | Single-Phase AC / 350 W (up to 410 W) |
| Motor & Blower Assembly | 2 Motors, 3 ABS Blowers, 1 Single + 1 Double Shaft |
| Noise Level by Speed | 50 dB (2100 RPM) to 70 dB (2700 RPM) |
Post-Mounting Verification and Commissioning
Once mechanically secured and wired, perform an operational commissioning check. Ensure the three ABS blowers rotate freely without friction against the MS housing. Verify line voltage and switch the unit across both speed settings (2100 RPM and 2700 RPM) to verify air output matches the rated 825 CFM volume. Inspect the directional flow at the floor threshold to confirm uninterrupted air curtain coverage across the 900 mm door opening, ensuring proper deflection of ambient outside drafts.
