The Castair UNE-20-25 Noise Reduction Enclosure is purpose-built for rotary screw air compressors in the 20 to 25 horsepower range. If you're running a rotary screw unit inside your shop — or adjacent to an office, waiting room, or customer-facing area — you already know the noise problem. Rotary screw compressors in this HP range run continuously and produce a constant high-frequency drone that's exhausting to work around for hours at a time. The UNE-20-25 enclosure drops that to a manageable level without restricting airflow or making maintenance a hassle.
Who This Enclosure Is For
The UNE-20-25 is designed for shops running compressors in this specific HP bracket:
- Automotive service shops with a 20 or 25 HP rotary screw unit in the main service bay
- Body shops where compressor noise interferes with paint mixing, customer interaction, or estimating areas
- Small manufacturing or fabrication facilities with open floor plans where compressor noise carries
- Facilities where the compressor room is not fully isolated from the work area
- Shops that have received noise complaints from adjacent tenants or neighbors
If you're running a smaller unit (5-15 HP), the UNE-5-15 is the right fit. If you're running above 25 HP, contact us — we can help identify the correct enclosure or whether a custom solution is needed.
How the Enclosure Works
Castair noise reduction enclosures use sound-dampening panels to absorb and block airborne noise from the compressor pump, motor, and cooling fan. The enclosure is engineered to maintain adequate airflow for cooling — you can't just box in a rotary screw compressor with solid walls and call it done. These enclosures include ventilation provisions that allow the compressor to breathe and dissipate heat while still reducing sound output at the source.
Key Features
- Designed for 20-25 HP Rotary Screw Compressors: Sized and configured for this HP range — not a generic enclosure adapted to fit
- Sound Dampening Construction: Multi-layer panels absorb high-frequency compressor and motor noise
- Ventilation Provisions: Engineered openings maintain required airflow for compressor cooling during continuous operation
- Access Panels: Designed to allow routine maintenance access without full disassembly of the enclosure
- OEM Castair Product: Engineered to work with Castair rotary screw compressor packages in this HP range
- Durable Construction: Built for permanent installation in a shop environment
Noise Reduction — What to Expect
A properly installed noise reduction enclosure typically reduces perceived compressor noise by a meaningful amount — the exact dB reduction depends on the compressor model, installation conditions, and room acoustics. The goal is to bring compressor noise to a level where shop conversation, phone calls, and customer interaction are not constantly disrupted. This enclosure will not produce a silent environment, but it makes a significant practical difference in daily shop comfort and hearing protection.
For shops where OSHA noise exposure limits are a concern, an enclosure like this is one part of a noise control strategy — combine it with compressor room isolation and hearing protection for personnel working in proximity.
What's in the Box
- 1x Castair UNE-20-25 Noise Reduction Enclosure (complete enclosure assembly)
Note: Manufacturer product page data was not available at time of writing. Exact panel count, hardware, and assembly hardware included are not confirmed. Contact us for current specifications and what's included before ordering.
Available Configurations
- UNE-5-15 ($2,956.80) — For compressors in the 5 to 15 HP range
- UNE-20-25 ($3,388.00) — For compressors in the 20 to 25 HP range (this unit)
Select your enclosure based on your compressor's actual horsepower rating. Using an undersized enclosure creates airflow restrictions; an oversized one won't seal effectively and won't reduce noise as designed.
When Does a Shop Need This vs. Stepping Up or Down
The UNE-20-25 is the right choice when your compressor falls in the 20-25 HP bracket and you need meaningful noise reduction without relocating the unit. If your compressor is in a dedicated, well-isolated mechanical room, an enclosure may not be necessary — but if it's in the open shop, this investment pays back quickly in shop comfort and reduced hearing fatigue.
If you're unsure whether your compressor falls in this HP range or the 5-15 HP range of the UNE-5-15, check your compressor's motor nameplate. The HP rating is stamped directly on the motor. Call us if you're unsure — we'd rather confirm compatibility before you order than have you deal with a return.
Technical Specifications
- Part Number: UNE-20-25
- Manufacturer: Cast Air / Castair
- Application: 20-25 HP rotary screw air compressors
- Category: Noise Reduction Enclosures
- Price: $3,388.00
Dimensions, weight, noise reduction rating (dB), and panel specifications were not available from manufacturer data at time of writing. Contact us for full specification sheet.
Why Buy From Air Compressor Factory Direct?
- Castair Specialist: We carry the full Castair enclosure line and can confirm compatibility with your specific compressor model and installation
- Free Shipping: On qualifying orders — contact us about freight options for large enclosure assemblies
- Free Tech Support: Call 866-217-0063 for sizing guidance and installation questions
- Full Manufacturer Warranty: Covered under Castair's standard product warranty
- Honest Guidance: If the UNE-20-25 isn't the right fit for your setup, we'll tell you — and help you find what is
Call 866-217-0063 for quick answers and help!
