A Q-PAC Fan is a multimotor plenum fan that combines multiple motorized impellers with a patented fan controller and an adaptive custom frame to operate as a single fan.

No, the Q-PAC Fan is a fan. A fan array is traditionally made up of multiple fans, each of which would be connected back to an external control panel and controlled directly by the BMS or a separate controls architecture. Although the Q-PAC Fan has multiple centrifugal Motorized Impellers that move air similar to Fan Arrays, the Q-PAC Fan communicates, performs, and is controlled just like a single fan.

The Q-PAC Fan offers distinct advantages over both AC Blower + VFD combinations and traditional Fan Arrays. Both of those options carry with it complexities & downsides that the Q-PAC Fan was designed to overcome.

AC Blowers + VFDs boast simple controls and operation, but heavily lack on the reliability aspect. As soon as your large blower goes down, it can be costly and time consuming to get it back up and running, not to mention the perpetual greasing, belt replacement, and shaft alignment.

Traditional Fan Arrays combat this by having inherent redundancy, reducing the damage caused if one of the fans goes down. The downside is the complexity that arises when you have multiple air movers. The installation, control, wiring, and specialized parts make these fan arrays far from simple.

The Q-PAC Fan can ship assembled direct to an AHU manufacturer or as a knocked down variant, with each part of the Q-PAC Fan being hand carried to the install location. Only an impact driver is needed to assemble the frame, motorized impellers, and fan controller. The Q-PAC Fan has an integrated controller that acts as the brain of the product. Out of the box, the Q-PAC Fan includes the pre-assembled motor harnessing that connects all motors to the controller, no field wiring required to each motor. The only connections required are to the Fan Controller which contains the controls.

With multiple motorized impellers and a single interface for controls, the Q-PAC Fan provides the reliability of having multiple motors with the simplicity of connecting with a single fan.

The Q-PAC Fan comes with 1-9 motorized impellers, 1-9 motor harnesses, interlocking frame panels, 1 patented fan controller, all required installation hardware, and electrical, installation, and user guides.

Yes, the Q-PAC Fan comes with a 5-Year parts warranty for all components.

Yes, the Q-PAC Fan is a UL 60335-2-40 Recognized Component.

The Q-PAC Fan is designed for commercial comfort cooling applications in new air handlers, existing air handlers, or even in retrofit situations.

The Q-PAC Fan controller, located within the airstream, is the point of connection between the Q-PAC Fan and the external system controls, which could be an existing device or a Q-PAC panel. The controller automatically distributes the control signal to each motor in addition to monitoring its run status and calculating the total airflow.

The Q-PAC Fan communicates via MODBUS to an external control system.

No, the Q-PAC Fan does not speak MODBUS to each motor.

If a motor fails during operation, the other motors will continue to run and the Q-PAC Fan Controller will communicate that there is a failed motor via MODBUS or its analog alarm relay. Depending on the control method used to modulate the fan, the other fans may ramp up to make up the lost airflow.

Yes, each motor receives the same 0-10V modulation signal by default.

Yes, there is an alarm relay available as well as a MODBUS data point communicating the Q-PAC Fan’s alarm status.

If there is a failure of the Q-PAC Fan controller that affects the integrity of the 0-10V modulation signal, a bypass is opened and the 0-10V signal from an external source is passed directly to the motors, bypassing the controller functionality.

A BMS is not required to operate the Q-PAC Fan, all you need is a speed signal and a supply voltage.

A single Q-PAC Fan can be configured to be between 27.0” – 150.0” W and 25.0” – 140.0” H. Larger applications can combine multiple fans or custom solutions.

Only an impact driver with hex sockets is needed for full Q-PAC Fan installation.

The Q-PAC Fan can arrive assembled direct to an AHU manufacturer or directly to a project location knocked down on pallets. One pallet will contain the frame panels and the others will contains the motorized impellers. A standard forklift is capable of carrying all palletized components.

If there is an existing mounting flange at the install location, then the Q-PAC Fan frame should be mounted directly to that flange using the pre-punched holes on the panels. If no pre-existing mounting flange is present, use the optional Perimeter Angle that can be supplied. This acts as the adapting component from the Q-PAC Fan to the internal surface of the install location.

A single Q-PAC Fan can contain up to 9 motorized impellers as standard.

Due to the Q-PAC Fans dynamic sizing, the weight of the fan varies greatly depending on the specific layout. The fan can be as little as 85 lbs. for small configurations or as heavy as 1200 lbs. in its largest. These weights would be the final install weight.

Yes, the Q-PAC Fan can be tailored to specific dimensions and completely seals the airstream.

Yes, the Q-PAC Fan determines the static pressure that each motorized impeller creates. These values are converted to an airflow value and added together to obtain the fan’s total airflow.

The most powerful of Q-PAC Fans can generate over 90,000 CFM. If more airflow is needed, Q-PAC can offer its standard FS1 product which is an array of 2 or more Q-PAC Fans in order to surpass this 90,000 CFM.

Standard Q-PAC Fans can produce up to 9” of Static Pressure.

Resiliency is the percentage of the required airflow that can be met when there has been a motor failure. A resiliency greater than 100% would indicate that upon a motor failure, the required airflow could still be met.

If motor redundancy is required, Q-PAC Fans can be configured for motor redundancy. The redundancy is represented as the percentage of the designed duty point that can be obtained if a motor fails (Resiliency). A 100% resilient value would mean that with 1 motor failure, 100% of the design duty could be met.

Yes, Q-PAC Fans can have backdraft dampers if required, but they are typically not recommended. Due to the speed at which a replacement motor can be shipped and replaced, the performance reduction caused by the dampers is usually not worth the trade-off of cost vs performance. If chosen, the dampers are gravity activated and do not require actuating. Expect a minimum of 0.2” pressure drop.

Only 2 connections are required to operate the Q-PAC Fan are a 0-10V speed signal and a 208V/3~/60Hz OR 480V/3~/60Hz power supply. For advanced operation and communication, the fan can communicate via MODBUS to an external controller.

208V/3~/60Hz or 480V/3~/60Hz.

Yes, the harnesses containing the power, control, and pressure connections are included as standard with the Q-PAC Fan. These harnesses simply plug into a port on the Fan Controller on one end and the Motor Harness on the other. No termination of wires required.

The exact MCA will vary depending on the Q-PAC Fan model. The Q-PAC Fan can have up to 95A MCA as standard.

The Q-PAC Fan leverages Ultra-Premium Efficiency EC Motors for its motorized impellers.

When a motor needs replacing, simply unbolt it from the wall with an impact driver. If you have the spare motorized impeller on hand, place it on the ledge and put the bolts back in. If the spare motorized impeller is on order, the Backflow Prevention Plate can be installed in order to prevent backflow through the open slot.

Motorized Impeller replacement is the only maintenance necessary.

Q-PAC’s commercial fan system is designed for zero maintenance. Our plug-and-play architecture with a single point connection means there’s no complex mechanical upkeep, just consistent, reliable airflow.

Not at all. Q-PAC’s commercial HVAC fans are built with no scheduled maintenance needed, thanks to their resilient design and built-in redundancy, ensuring consistent performance without ongoing service checks.

Virtually none. Our HVAC fans are engineered for resilience, with no belts, bearings, or wearable parts that need regular servicing. The fan system is designed for very simple maintenance with standard fasteners and plugs; replace a motor with zero wiring.

The system is also 100% resilient, so if one motor fails, the others pick up the load without an interruption or reduction of air flow. If motors do need to be replaced, it can be done in minutes with minimal labor.

No. Q-PAC fan systems are intentionally designed for ease of use and quick serviceability. Because our units are modular, hand-carryable, and plug-and-play, your facilities teams can handle replacements or adjustments without specialized tools or training.

If an issue ever arises with your Q-PAC fan system, we’ve got you covered. Replacement parts ship within 48 hours, ensuring minimal disruption, and no specialty tools or teams are required.

Q-PAC systems are engineered to integrate seamlessly into any AHU, eliminating traditional maintenance headaches. With no parts to maintain and a truly plug-and-play modular setup, maintenance teams spend their time elsewhere.