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Kube
Now Available
Scale your
exhaust system
to 80,000 CFM.
The PLASTEC KUBE is a modular polypropylene manifold system that connects multiple PLASTEC 50 centrifugal fans into a single rooftop unit. Start with one KUBE module — up to 4 fans — and expand by adding modules as your flow requirements grow. All-polypropylene construction, high-velocity discharge, no coatings.
80KCFM
Total flow, up to
3,000FPM
Stack velocity
100% PP
No coatings
KUBE · 3-WAY P50
Engineered for Large-Scale Corrosive Exhaust Applications
Pre-engineered
galvanized roof curb
galvanized roof curb
Full polypropylene
airstream path
airstream path
High-velocity
plume dispersion
plume dispersion
N-1 to N+2 redundancy
for critical labs
for critical labs
UV-resistant
polypropylene
polypropylene
Why PLASTEC KUBE
Engineered for large-scale exhaust.
Large-scale corrosive exhaust projects demand high flow, high velocity, and zero tolerance for corrosion failures. The PLASTEC KUBE delivers all three — all-polypropylene construction from fan inlet to stack discharge, modular capacity that scales to your project, and individual per-fan stacks that maintain the plume dispersion performance your engineers are specifying.
01 / MATERIAL
Polypropylene plenum, end-to-end.
The KUBE plenum is fully fabricated from thick-wall polypropylene. No coatings to degrade, no hot-spots of corrosion failure, no galvanic issues at fan-to-plenum connections. The entire airstream path — from fan inlet to speed-nozzle discharge — stays in PP.
02 / VELOCITY
High-velocity dispersion, preserved at scale.
Unlike dilution-only manifolds, each fan on the KUBE retains its individual stack and optional speed nozzle. You scale total flow without sacrificing the ~3,000 FPM discharge velocity that drives true plume dispersion above the roofline.
03 / INSTALLATION
Supplied with a galvanized roof curb.
The KUBE is supplied with a pre-engineered galvanized roof curb, so the contractor's scope is exactly what they expect: set the curb, land the unit, connect the duct. No field fabrication of the manifold. No custom transitions. No surprises.
04 / WEIGHT
30 to 50% lighter than the alternatives.
Polypropylene construction makes the KUBE significantly lighter than steel, coated steel, or FRP equivalents — starting at 611 lbs for a single-fan unit, and easing structural load requirements, roof curb design, and crane time on every project.
Configurator
Configure your KUBE system.
Select your base configuration and add modules to match your flow requirements. Enter your target duty point to see required operating speed and exhaust velocity.
K50 Modular Manifold — Configurator
Pick your starting configuration, then add modules of the same type to scale up airflow.
System Layout
View from top
Modules0
Total fans0
Max flow— CFM
Max static pressure— inwg
Footprint (W × D)— ft
Total weight— lbs
Duty Point Calculator
Performance Curve
Performance shown at 1750 RPM, derived from tested 1-module base units. Multi-module configurations scale flow linearly at matching static pressure (parallel-path assumption). For VFD-based duty point selection or large manifolded systems, confirm with PLASTEC engineering.
Engineering Specifications
Specified by engineers.
Specified by engineers.
Installed by contractors.
Every KUBE is engineered to AMCA-compliant standards and shipped with full submittal packages — including CAD drawings, per-fan and manifold-discharge performance curves, and roof-curb detail drawings.
BACnet / Modbus integration is available as a factory option for BMS-connected installations, and project stack heights and plume dispersion calculations are available on request from the PLASTEC engineering team.
- Full submittal package (CAD, curves, roof-curb details)
- Optional BACnet / Modbus controls
- Per-fan stack & speed nozzle options
- Plume dispersion modeling on request
ParameterValue
Plenum materialPolypropylene
Curb materialGalvanized aluminum
Compatible fansPLASTEC 50
Max total flow80,000 CFM
Stack velocity~3,000 FPM
Speed nozzlesOptional, per fan
Stack extensionsOptional, per fan
RedundancyN-1 / N+1 / N+2
ControlsOptional — VFDs with BACnet / Modbus
CertificationsAMCA certified — Sound & Air Performance
Ideal Applications
Where the KUBE fits.
Wherever corrosive exhaust has to leave a building safely, in volume, and above the roofline — the KUBE was designed for the large-scale projects where single-fan solutions fall short.
Universities & Research
Multi-wing science buildings with dozens of fume hoods on a common rooftop manifold.
Pharma & Biotech
cGMP-driven labs where corrosion-free exhaust and validated plume performance matter.
Hospital & Clinical
Centralized exhaust for pathology, oncology, and specialty labs with critical redundancy.
Industrial Chemical
Acid storage, plating, scrubber discharge — every airstream surface in polypropylene.
Get a Quote
Specify the KUBE for your project.
Share your project's flow and pressure requirements and the PLASTEC engineering team will get back to you with a configuration recommendation, submittal package, and pricing.
- Engineering review of your flow & static pressure requirements
- Submittal drawings, performance curves, and guide spec language
- Plume dispersion calculations available on request
- Project pricing and lead time within 1 business day
Get a Quote
We respond within 1 business day.
PLASTEC will never share your project information.
FAQ
Common questions.
What fan models are compatible with the KUBE?
[PLACEHOLDER — e.g. The KUBE is compatible with the PLASTEC 35 and PLASTEC 50 centrifugal fan series. All fan sizes within those series can be mixed within a single module.]
Is the roof curb included with the system?
[PLACEHOLDER — e.g. Yes. Each KUBE ships complete with a pre-engineered galvanized steel roof curb sized to the configuration. Curb drawings are included in the submittal package.]
Can I mix PLASTEC 35 and PLASTEC 50 fans on the same KUBE?
[PLACEHOLDER — e.g. No / Yes — confirm with engineering team.]
What is the typical lead time for a KUBE system?
[PLACEHOLDER — e.g. Standard lead time is X–X weeks ARO. Contact the PLASTEC engineering team for project-specific scheduling.]
Is a full submittal package available for specifications?
[PLACEHOLDER — e.g. Yes. Every KUBE order includes CAD drawings, per-fan and manifold performance curves, and roof curb detail drawings. Seismic calculations are available on request. Guide spec language is available on request.]
Can the KUBE be used for indoor applications?
[PLACEHOLDER — confirm with engineering team whether indoor / plenum-rated installation is supported.]
Have a project in progress?
Speak with a PLASTEC consultant about whether the KUBE is the right fit for your specifications, or to discuss alternative single-fan or manifolded approaches.
Contact a ConsultantNeed the existing PLASTEC lineup?
Our PLASTEC, STORM, JET, R, and V Series fans remain available — with free US shipping and in-stock units ready to ship in 2 business days.
Browse All Fans