Dual Inlet Centrifugal Blower With Scroll Housing

Dual inlet centrifugal blowers with scroll housing represent a breakthrough in industrial air-moving technology, designed specifically for applications demanding high airflow capacity, superior efficiency, and reliable performance. These precision-engineered systems feature a unique dual inlet design that simultaneously draws air from both sides, effectively doubling intake capacity compared to traditional single inlet configurations. Our comprehensive range serves diverse industries including HVAC systems, medical equipment cooling, telecommunications infrastructure, laboratory ventilation, and industrial air handling units.

The scroll housing, also known as a volute casing, plays a critical role in optimizing performance by gradually expanding the air passage, converting high-velocity airflow into static pressure. This intelligent design minimizes turbulence, reduces energy loss, and ensures smooth, consistent air delivery across demanding operational environments. With power configurations ranging from 105W to 400W and airflow capacities reaching up to 2,000 m³/h, our dual inlet centrifugal blowers deliver exceptional versatility for both compact installations and large-scale ventilation systems.

Product Categories by Voltage & Application

Our dual inlet centrifugal blower portfolio encompasses three distinct voltage platforms, each optimized for specific operational requirements and industry standards. Understanding these categories helps you select the ideal solution for your ventilation challenges.

24V DC Low-Voltage Systems: Perfect for automotive applications, mobile equipment, and battery-powered ventilation systems. These compact units deliver impressive performance while maintaining energy efficiency. Models like the 144W indoor recycling blower provide 960 m³/h airflow with whisper-quiet operation at 61 dB(A), ideal for air purifiers, recreational vehicles, and portable medical devices.

48V DC Medium-Voltage Solutions: Engineered for telecommunications, server cooling, and industrial control systems where higher voltage efficiency is required. The 223W quiet ventilation model excels in noise-sensitive environments such as libraries, museums, and medical facilities, combining robust airflow with exceptional sound dampening technology.

230V EC Commercial-Grade Systems: Built for heavy-duty commercial and industrial applications requiring maximum airflow and pressure generation. These electronically commutated motors offer superior efficiency and precise speed control. The 400W high-temperature system delivers 2,000 m³/h with 710 Pa static pressure, featuring MODBUS connectivity for seamless building automation integration.

Key Technical Advantages

Superior Airflow Distribution: The symmetrical dual inlet design fundamentally transforms air intake dynamics. By drawing air from both sides simultaneously, these blowers eliminate the uneven pressure distribution common in single inlet systems. This balanced approach reduces internal turbulence by up to 40%, resulting in smoother airflow, lower vibration levels, and extended component lifespan. The scroll housing geometry further optimizes this benefit by gradually expanding the air passage, converting kinetic energy into static pressure with minimal loss.

Enhanced Energy Efficiency: Modern EC motor technology combined with optimized impeller geometry delivers efficiency improvements of 15-20% compared to conventional designs. Variable speed control through 0-10VDC or PWM signals enables precise airflow adjustment, ensuring you use only the energy necessary for current demand. Many models consume less than 150W while delivering over 900 m³/h, achieving an impressive power-to-performance ratio that significantly reduces operational costs over the equipment's 50,000-hour rated lifespan.

Whisper-Quiet Operation: Advanced acoustic engineering keeps sound pressure levels between 61-74 dB(A) across our entire range. Precision-balanced impellers with optimized blade geometry minimize air turbulence and mechanical vibration, the primary sources of operational noise. This makes our blowers ideal for noise-sensitive environments including hospitals, research laboratories, educational facilities, and residential HVAC applications where comfort and concentration are paramount.

Industrial-Grade Durability: Constructed from premium materials including aluminum alloy motors and galvanized steel impellers, these blowers withstand harsh environmental conditions. IP44 to IP54 protection ratings ensure reliable operation in dusty, humid, or splash-prone environments. Operating temperature ranges from -25°C to 60°C accommodate extreme climates, while comprehensive protection features including overcurrent limiting, thermal overload detection, and reverse polarity protection safeguard against electrical faults and extend service life.

Technical Specifications Overview

Industry Applications & Use Cases

HVAC & Building Automation: Commercial air handling units, rooftop ventilation systems, and ducted climate control installations benefit from the high static pressure capabilities of dual inlet designs. These blowers efficiently overcome resistance in long duct runs and multiple filter stages, ensuring consistent airflow throughout large commercial buildings, shopping centers, and office complexes.

Medical & Healthcare Facilities: Critical applications including surgical suite air supply, patient room ventilation, medical equipment cooling, and pharmaceutical cleanroom systems demand the reliability and precision our blowers deliver. Ultra-quiet operation preserves healing environments while IP54-rated construction ensures hygienic, easy-to-clean surfaces that meet strict healthcare standards.

Telecommunications & Data Centers: Server rack cooling, network cabinet ventilation, and telecommunications equipment thermal management require dependable 24/7 operation. Our compact 133-146mm designs fit tight spaces while delivering powerful airflow to prevent overheating of sensitive electronics. Smart control integration via MODBUS enables real-time monitoring and automated thermal response.

Laboratory & Research Facilities: Fume hood exhaust systems, analytical equipment cooling, and environmental chamber air circulation benefit from precise speed control and stable airflow characteristics. The chemical-resistant galvanized steel construction withstands exposure to corrosive fumes, while low vibration operation protects sensitive measurement instruments.

Industrial Manufacturing: Process cooling, welding fume extraction, paint booth ventilation, and general factory air circulation applications leverage the robust construction and high-temperature tolerance of our industrial-grade models. External driver configurations simplify maintenance in hard-to-reach installations, minimizing downtime and service costs.

Selection Guide: Choosing the Right Model

Selecting the optimal dual inlet centrifugal blower requires careful consideration of several key factors:

Airflow Requirements: Calculate the total air volume needed for your space using the formula: Airflow (m³/h) = Room Volume × Air Changes per Hour. For example, a 100m³ laboratory requiring 10 air changes hourly needs 1,000 m³/h minimum capacity. Always select a blower rated 10-15% above calculated requirements to account for filter loading and duct resistance.

Static Pressure Considerations: Measure the total resistance in your system including ductwork, filters, grilles, and dampers. Systems with long duct runs (over 10 meters) or multiple HEPA filters require higher static pressure ratings (500+ Pa). Short, direct installations may operate efficiently at 250-300 Pa.

Environmental Conditions: Ambient temperature extremes, humidity levels, and exposure to dust or chemicals influence material selection and protection rating requirements. Corrosive environments mandate galvanized steel or stainless steel construction, while humid applications require IP54 minimum protection.

Noise Sensitivity: Occupied spaces, healthcare facilities, and residential applications typically require sound levels below 65 dB(A). Industrial settings may accommodate 70-75 dB(A) levels. Consider acoustic enclosures or vibration isolation mounts for particularly sensitive installations.

Control Integration: Building automation systems benefit from MODBUS connectivity and analog/PWM speed control. Standalone applications may operate effectively with simple on/off switching. Consider future automation plans when specifying control capabilities.

Frequently Asked Questions

What makes dual inlet centrifugal blowers more efficient than single inlet designs?
The symmetrical dual inlet configuration draws air from both sides simultaneously, creating balanced pressure distribution and eliminating the turbulent air patterns common in single inlet systems. This reduces internal friction losses by 15-20% and allows the impeller to operate more efficiently. The result is higher airflow delivery with lower power consumption and reduced noise generation. For ducted systems requiring moderate to high static pressure, dual inlet designs consistently outperform single inlet alternatives.

How does the scroll housing improve blower performance?
The scroll housing, or volute casing, features a gradually expanding cross-sectional area that converts the high-velocity air leaving the impeller into static pressure through controlled deceleration. This principle, known as the Bernoulli effect, recovers kinetic energy that would otherwise be lost to turbulence. The optimized scroll geometry in our blowers achieves conversion efficiencies exceeding 85%, maximizing pressure generation while minimizing energy waste. This makes scroll housing designs ideal for applications requiring high static pressure, such as long duct runs or multi-filter installations.

Can these blowers operate in high-temperature environments?
Yes, our industrial-grade models feature components rated for extended temperature ranges. Standard fan operation is guaranteed from -25°C to 60°C, while specialized high-temperature models accommodate ambient temperatures up to 80°C. Internal components including IC heat sinks (115°C max), ball bearings (80°C max), and wiring insulation (120°C max) are engineered to withstand thermal stress in demanding applications such as industrial ovens, automotive paint booths, and process cooling systems. For extreme temperature applications, consult our industry solutions page for specialized configurations.

What maintenance procedures extend blower lifespan?
Preventive maintenance focuses on three key areas: regular filter inspection to prevent restriction-related stress, periodic bearing lubrication (although sealed bearings in our models require no service for 50,000 hours), and impeller cleaning to remove dust accumulation that can cause imbalance. We recommend quarterly visual inspections, semi-annual airflow performance testing, and annual detailed servicing including electrical connection checks and vibration analysis. Proper maintenance routines can extend operational life beyond the rated 50,000-hour L10 lifespan, often achieving 7-10 years of continuous service.

How do I integrate these blowers with building automation systems?
Our EC motor models feature comprehensive control interfaces including 0-10VDC analog input for proportional speed control, PWM (pulse width modulation) for digital speed adjustment, and RS485 MODBUS RTU protocol for advanced system integration. The tachometer (FG) output provides real-time RPM feedback for closed-loop control and fault detection. Connection is straightforward through standard terminal blocks or optional quick-connect harnesses. For detailed integration specifications and wiring diagrams, visit our technical support resources or contact our engineering team for application-specific guidance.

What protection features prevent equipment damage?
All models incorporate comprehensive safeguards including motor current limitation preventing overcurrent damage, soft-start protection reducing mechanical stress during startup, under/overvoltage detection protecting against power quality issues, thermal overload protection for both electronics and motor windings, locked-rotor protection detecting mechanical jams, and reverse polarity protection preventing installation errors. These redundant safety systems ensure reliable operation even in challenging electrical environments and protect your investment from common failure modes.

Why Choose Fanova Dual Inlet Centrifugal Blowers

With over a decade of specialization in precision air-moving technology, Fanova delivers engineering excellence backed by rigorous quality control and comprehensive technical support. Every blower undergoes factory performance testing including airflow verification, sound level measurement, vibration analysis, and endurance cycling before shipment. Our global logistics network ensures prompt delivery with protective packaging engineered to prevent transit damage, while our technical team provides application engineering support, custom configuration services, and rapid-response warranty coverage.

Whether you're upgrading existing ventilation infrastructure, designing new commercial HVAC systems, or engineering specialized industrial air handling solutions, our dual inlet centrifugal blower range delivers the performance, reliability, and efficiency your project demands.