Q Series Standard Performance Fan Filter Units
The Q Series offers a reliable and cost-effective solution for maintaining clean air and positive pressure in controlled environments. These 3-speed HEPA units are engineered for dependable performance, ease of use, and a space-saving, low-profile design.
Filtration & Air Quality
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Dual-Stage Filtration: Each unit comes standard with a 30% ASHRAE pleated pre-filter to capture larger airborne particles, protecting and extending the life of the primary HEPA filter.
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High-Efficiency Final Filter: The standard HEPA filter is 99.99% efficient at 0.3 microns. For facilities requiring even higher purity, an ULPA grade (99.9995%) filter is available as an optional upgrade.
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Certified Protection: All final filters are shielded by a white epoxy diamond-pattern grille and are rigorously tested to meet IEST and ISO standards.
Advanced Motor Technology
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User-Friendly 3-Speed Switch: Features a high-quality 3-speed motor control (High, Medium, Low), allowing for simple, repeatable airflow settings without the need for complex calibration.
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Reliable Operation: Powered by a $1/5$ HP single-phase, permanent split capacitor motor featuring thermal overload protection and a 15 mfd capacitor for long-term safety and durability.
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Voltage Options: Available in 115V (60 Hz) and 277V (60 Hz) configurations to suit your facility’s electrical infrastructure.
Performance Metrics
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Reliable Airflow: * 2′ x 4′ Units: 340 to 640 CFM (Nominal 510 CFM at 90 FPM).
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Quiet Efficiency: These units are designed for noise-sensitive environments, averaging sound levels of 50–52 dba at 90 FPM face velocity (measured 30” from the filter face).
Design & Installation
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Low-Profile Footprint: With a total height of only 12-5/8”, the Q Series is ideal for facilities with restricted ceiling heights or tight plenum spaces.
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Standardized Fit: Perfectly sized to integrate into a nominal 2’ x 4’ or 2’ x 2’ ceiling grid with a standard opening (22.5” x 46.5” for 2×4 models).
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Corrosion-Resistant Housing: Constructed with a lightweight anodized aluminum frame, providing a rigid and professional finish that stands up to cleanroom environments.
Why Choose 3-Speed Control?
The Q Series 3-Speed models are the preferred choice for projects that prioritize simplicity and cost-efficiency. This motor configuration is ideal for:
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“Set-it-and-forget-it” Operations: Perfect for modular cleanrooms where airflow requirements remain consistent.
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Budget-Conscious Projects: Provides high-end filtration and build quality at a more accessible price point.
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Simplified Maintenance: Easy-to-replicate speed settings across multiple units ensure uniform performance without the need for manual “dialing-in.”
Choosing the Right FFU: Q Series vs. M Series
While both series are designed to provide high-efficiency HEPA filtration and maintain positive pressure, the primary difference lies in the airflow capacity and how you control that airflow.
| Feature |
Q Series (Three Speed) |
M Series (Variable Speed) |
| Motor Control |
Three-Speed Switch: Offers High, Medium, and Low presets. |
Solid-State Variable Speed: Allows for “dial-in” precision of airflow. |
| Airflow (2′ Χ 4′) |
340 to 640 CFM (510 Nominal @ 90 FPM) |
400 to 750 CFM (632 Nominal @ 90 FPM) |
| Best For |
Standard applications and budget-conscious projects. |
Precise ISO Class requirements and higher air change volume. |
| Profile |
Low Profile: 12-5/8” high (all models). |
Low Profile: 12-5/8” high (all models). |
| Flexibility |
Moderate. Reliable performance using set speed intervals. |
Highest. Fine-tune CFM to compensate for filter loading over time. |
| Adjustability |
Step through three distinct performance tiers. |
Infinite adjustment between minimum and maximum CFM. |
Which one do you need?
Select the Q Series if:
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You need a dependable, “set-it-and-forget-it” filtration solution.
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Your application is less sensitive to minor fluctuations in CFM.
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You are looking for a cost-effective way to pressurize Modular Softwall Clean Rooms.
Select the M Series if:
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You require higher air volume; the M Series delivers ~24% more nominal CFM than the Q Series.
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You are building a room that requires exact air change rates to meet strict ISO certification.
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You want the ability to precisely balance a Ceiling Grid with multiple units to ensure uniform airflow.
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You need a low-profile design for tight plenum spaces (both units share this advantage).
Expert Advice: Not sure which motor configuration is right for your square footage? Our team can help you calculate the necessary Air Changes Per Hour (ACPH) and recommend the unit that ensures your room stays within compliance. Contact us for a technical consultation.
Your Vision, Our Expertise
Designing a clean room is about more than just buying the right filters—it’s about creating a controlled environment that meets rigorous ISO standards and operational goals. At Bennett and Bennett, we don’t just sell equipment; we provide the technical guidance necessary to ensure your facility performs exactly as required.
Whether you are installing a Modular Softwall Clean Room or a Ceiling Suspended system, our team is here to help you:
- Determine Class Requirements: We help you navigate ISO 1 through ISO 8 specifications to find the right balance of airflow and filtration.
- Custom Layout Design: We assist in selecting the right Grid Systems and Ceiling Panels to maximize space and efficiency.
- Optimize Airflow: Utilizing high-performance Fan Filter Units, we calculate the exact CFM needed for your square footage.
Need a technical consultation? Contact our experts today to discuss your project specifications and ensure your build meets all required standards.
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