Prepare heat-pump fan selection around the outdoor coil and the complete enclosure. Supply airflow and pressure requirements for heating, cooling where applicable, and relevant transition modes, together with ambient exposure and acoustic targets. LONGWELL EC axial references provide a starting point for the model review.
The fan operates with a coil, guards, panels and surrounding clearances. Use their combined resistance and the equipment mode schedule to compare candidate fans. For integrated ventilation systems, define the ducted-air duty separately from the outdoor-coil duty so each fan can be selected on its own requirements.
WATCH THE APPLICATION PRINCIPLE · ENGLISH
In heating mode, the outdoor evaporator is colder than the incoming air. The fan renews air at the fins, allowing heat to pass into the refrigerant. Frost and inlet restrictions change the air-side operating conditions.
English narration and on-screen captions · 83 seconds · Equipment and flow paths are schematic.
Product scope in this film: Evaluate LONGWELL EC axial candidates with the actual coil, clearances, controls and outdoor conditions. Defrost operation and complete heat-pump performance require equipment-specific validation.
Explore the LONGWELL fan family · Share your equipment and air-path requirements
Record the required airflow and external static pressure for each heat-pump operating condition. State the air condition used for the duty calculation and describe the coil and inlet arrangement. Include the control response around defrost and restart so the proposed fan can be reviewed against the intended sequence.
Check fan diameter, inlet clearance, guard position and panel mounting against the equipment drawing. Identify rain, condensation, corrosion exposure and the relevant motor ambient temperatures. Include service access and cable routing in the mechanical review; these details help define a configuration that can be evaluated in the actual enclosure.
Define the supply and speed command, then compare the sound target at specified fan operating points. Distinguish the fan’s measured data from the assembled outdoor unit, where panels and inlet conditions can affect the result. Agree feedback requirements and the equipment response to a fan fault before prototype testing.
Compare the proposed model at the required airflow and pressure, then check the installation and control interface.
An EC axial family for outdoor-coil air movement. Select using the installed duty, guard geometry and specified ambient exposure rather than free-air flow alone.
Explore this fan family →
Consider EC centrifugal formats where the heat-pump package includes a separate ducted ventilation path. Define that duct and filter duty independently of the outdoor fan.
Explore this fan family →Product images show family configurations. Request the drawing, curve and electrical information for the exact model being considered.
Share these application details so the fan proposal can be reviewed against your equipment.
A drawing, the operating condition and a clear control requirement make the proposed configuration easier to compare. For a replacement, include the existing nameplate and wiring details.
Discuss your application →Review axial fan formats and series information before requesting operating-point, acoustic and installation data for the selected configuration.
EC centrifugal series · PDFEC backward-curved fan catalogue ↗Use the family references for initial comparison, then confirm the selected assembly with its inlet geometry and required operating point.
Engineering checklistFan replacement controls checklist ↗Record electrical, control and mechanical interfaces when comparing an existing fan with a proposed replacement in the complete equipment.
Catalogs support initial selection. Confirm the current specification and approved configuration with the project team.
Specify them separately when the package has distinct air paths. The outdoor fan works against the coil and enclosure, while a ventilation fan may also serve ducts, filters or heat-recovery components. Their pressure requirements and operating schedules can therefore differ within the same system.
Compare data at the same airflow, pressure and measurement conditions, then verify the assembled unit. Include the fan speed or control setting, measurement position and enclosure arrangement in the test record. Catalogue sound figures alone do not describe every heat-pump installation or operating mode.
Send the drawing, target duty and project timing. Add the existing fan details when you need a replacement.
