Designed and manufactured for FANWALL® systems, these direct drive fans come in 7 sizes from 10 to 22 inches to closely match specific requirements for wheel diameter, tip speed and wheel width to optimize operating efficiency. All sizes are AMCA certified at 72+% efficiency using AMCA 210 — Arrangement "A", which is better than any fan in its size range, and equal to or better than larger fans used in twin fan and four fan systems.
Premium polymer fans offer higher energy efficiency, lower sound levels and multiple motor combinations. The HPF-P200 fan wheel and cone for use with standard internal rotor motors. The HPF-P200-ECMi has an integrated electronically commutated permanent magnet motor. >Learn more
FANWALL cubes are not limited to a fixed size, enabling the array to be selected to more closely fit air tunnel dimensions so that the fans produce a uniform piston of air over the entire coil surface for optimal heat transfer and even filter loading. This eliminates the need for diffusers, blenders and other components required to reconfigure airflow from the fan(s) as it enters the coil, and the static pressure penalty they introduce. The added flexibility also proves effective in reducing the finish work required for retrofit applications, and allows the optimal combination of fans and motors to be selected to match air handler length restrictions, desired redundancy, and reduced brake horsepower and electrical requirements.
FANWALL systems are designed to eliminate vibration at the source, within each FANWALL cube, through stringent balance requirements and the use of sturdy components. This careful attention to detail results in more efficient and quieter operation, and eliminates the need to isolate a FANWALL array within the air handler. It can also help eliminate the need for a concrete inertia pad for the air handler, and facilitate meeting requirements for seismic certification.
Patented enclosure for FANWALL cubes is lined with perforated steel and acoustic insulation to provide as much as an 18 dB reduction in discharge sound power, particularly in lower octave bands. In addition to helping avoid the added cost, unit length and constant static pressure penalty of sound attenuators, the air-over environment created by the Coplanar Silencer enables the use of incremental horsepower motors and FANWALL Permanent Magnet (PM) motors to promote optimal efficiency and keep electrical installed costs low.
The patent pending FANWALL backdraft damper prevents parasitic losses due to backflow through idled fans and motors. It is the only commercially available means that does so automatically and with net zero impact (or system effect) on airflow while fans and motors are operating normally. When closed, the damper has an extremely low leak rate of 3.5 cfm/sq. ft. at 4" static pressure, which is less than half the 8 cfm/sq. ft. at 4" static pressure required for highest Class 1A rating of AMCA Standard 511. Alternative dampers used for the same purpose can introduce 0.5" to as much as 1.25" of static pressure penalty every minute the system is operating, with cataloged leak rates as high as 17.5 cfm/sq. ft. at 1" static pressure when they are closed!
The 17 additional motor horsepower selections between 1 and 15 hp for FANWALL systems are made possible by the cooling effect of airflow over the motor fins within the patented Coplanar Silencer enclosure. With the added selections, designers can more precisely match the design fan brake horsepower requirement of each fan and the array, helping to achieve the lowest possible connected load for the air handler. Additional benefits can include reduced wiring and switchgear costs, and higher operating efficiency for the air handler. With the exception that their nameplate horsepower reflects the specific duty selected for a given FANWALL system, the motors are standard totally enclosed air over (TEAO) motors, with standard NEMA T-frame sizes and Class H rated insulation.
Patent pending component is the most compact option for added control of inlet sound. Each module is attached to the FANWALL cube inlet to provide sound attenuation in the critical lower octave bands while adding zero air pressure drop to the system. This avoids the added cabinet length required for a cabinet-installed sound attenuator, or the added field labor for a duct-mounted attenuator. More importantly, FANWALL Active Noise Control eliminates as much as 0.75" of constant static pressure penalty versus other attenuator options. >Learn More
Benefits of a dedicated VFD for each fan and motor combination include electrical and space savings, redundancy, and control. Because each VFD is sized for the fan brake horsepower it serves, versus all or part of the array, the unit main wire size and electrical components can typically be reduced accordingly. A single point power connection to all VFDs speeds installation. The control panel can be downsized for the smaller physical size of the VFDs, and reduced even further if the VFDs are mounted at each cube. A fan, motor or VFD failure is inherently isolated, eliminating the need for a bypass VFD or the potential for a ground fault failure of the entire array. N+1 redundancy can be selected for the lowest possible connected horsepower as only a portion of the total system brake horsepower need be replaced. Dedicated VFDs are required for patented FANWALL system optimization controls to enable individual on/off and speed control of fans to maintain peak static efficiency and pressure over the air handler operating range.
In the Smart Cube configuration, active control components are factory-installed and wired at the FANWALL cube for quick connection to power at the control panel. This eliminates labor and time to field-install power wiring, pressure tubing and communications cabling in the air handler, and dramatically reduces the size and complexity of the unit control panel. It is especially ideal for fan retrofit applications where timelines are tight. The FANWALL VFD includes a fully-integrated pressure transducer and MCP disconnect, and is designed for seamless integration with the FANWALL cube to avoid airflow disturbance. Exclusive R3FILTERING™ stops the source of harmonic distortion to help meet IEEE519 without an external line reactor or filter. Up to 32 drives can be commissioned and controlled from the remote touch pad, giving you full control of each VFD, individual or aggregate motor status and all parameter adjustments and fault feedback. A standard Ethernet connection port allows set up or monitoring using a laptop computer.
In addition to providing control selections to optimize the operating performance of FANWALL systems in constant and variable air volume systems, Huntair offers the most flexible options to meet added requirements such as redundancy, electrical sizing, space constraints and specialized operating parameters for mission critical applications. Many of the unique features of FANWALL TECHNOLOGY — including the FANWALL backdraft damper, dedicated variable frequency drives, the Coplanar Silencer and incremental horsepower motors — play an integral role in our system optimization controls and/or enable control requirements to be met while minimizing trade-offs. Ultimately, customers benefit from reliable, close control of indoor environment conditions, lower installation costs, high energy efficiency and low operating costs.
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