Blower Wheels, Cross-Flow Impellers and Fan Blades for HVAC Equipment
The impeller sets most of a fan’s airflow, pressure and noise. Air-conditioner indoor units, mini-splits, fan coils, air curtains, furnaces and air handlers each use a specific wheel: long cross-flow (tangential) impellers for wall-mounted indoor units, squirrel-cage blower wheels for ducted units and furnaces, and axial fan blades for outdoor condensers.
LONGWELL manufactures these impellers in plastic and metal for HVAC equipment makers and replacement-part distributors, as loose wheels or as complete fan assemblies with motors.
Which impeller does your equipment use?
| Equipment | Impeller type | LONGWELL options |
|---|---|---|
| Wall-mounted split / mini-split indoor unit | Cross-flow (tangential) impeller | Plastic (AS/ABS/PP, glass-fibre reinforced) or aluminium; 50–180 mm diameter, length to 1,000 mm and more |
| Air curtain, electric heater, convector | Cross-flow impeller | Aluminium or plastic, custom length |
| Furnace, fan coil, ducted unit | Forward-curved centrifugal blower wheel (squirrel cage) | Aluminium and galvanized wheels; plastic centrifugal wheels |
| AHU, plug fan, purifier | Backward-curved centrifugal impeller | Aluminium, plastic or galvanized; nominal sizes from 150 mm up to about 1,400 mm |
| Outdoor condenser, window AC | Axial fan blade | Plastic axial blades, e.g. 385–556 mm outer diameter |
What to specify
- Dimensions: outer diameter, length or width, number of blades, hub/bore size and fixing method (set screw, clamp, insert)
- Rotation direction and blade angle
- Material: AS, ABS, PP (with or without glass-fibre reinforcement), aluminium, galvanized steel; colour
- Operating conditions: speed, temperature, humidity, condensate exposure
- Balance and noise requirements
- Supply form: loose impeller, or impeller + motor + housing assembly
Replacement and new designs
Yes. LONGWELL can provide replacement candidates for many mainstream HVAC blower wheels and cross-flow impellers. Send a sample or drawing with dimensions, bore and rotation; the final part is confirmed by fit, balance and a performance check in the unit. For new designs, LONGWELL also offers mould development for custom plastic impellers.
Browse: air-conditioner fan blades · plastic cross-flow impellers · aluminium cross-flow impellers · centrifugal impellers
Download: plastic cross-flow impellers · plastic axial fan blades · plastic centrifugal impellers · aluminium forward-curved impellers · aluminium backward-curved impellers · mould solution
Related: fan coil units · air curtains
What to include in your enquiry
- Equipment type and the impeller type you need
- Drawing, sample or key dimensions; rotation
- Material and colour
- Loose impeller or complete fan assembly
- Annual quantity; mould needs for new parts
Send your impeller drawing or sample →
FAQ
What is a blower wheel?
The rotating, cage-shaped impeller inside a centrifugal blower. It pulls air in at the centre and throws it outward into the housing, producing airflow and pressure.
What impeller does a mini-split indoor unit use?
A long cross-flow (tangential) impeller, usually plastic, running the full width of the unit.
Can you make an impeller to match my sample?
Yes. Send a sample or drawing. LONGWELL proposes a matching part or builds a custom mould for plastic impellers, confirmed by fit and test.
Plastic or aluminium impeller?
Plastic (AS, ABS, PP, often glass-fibre reinforced) is light, quiet and economical for indoor units. Aluminium suits higher temperatures, larger sizes and air curtains or heaters.