Cloud Electricals Coالعربية
RCU Series • 1,240 to 19,200 CFM (60Hz)

RCU Upblast Roof Fan

High-velocity centrifugal upblast roof fans (RCU05 to RCU32) for vertical exhaust discharge. Available in direct-drive and belt-drive configurations (0.25 to 10 HP) for clean-air ventilation or commercial restaurant kitchen grease hood exhaust across Saudi Arabia.

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In brief

What is the RCU upblast series?

The RCU Series is an aluminum centrifugal upblast roof exhaust fan engineered with the motor isolated completely outside the contaminated airstream. Designed following UL 705 and UL 762 standards, it discharges grease-laden vapors and hot air vertically away from the roof membrane, with optional grease drainage collection and access hinge kits for restaurant kitchen duct washdowns.

RCU centrifugal upblast roof fan for commercial kitchen grease and clean-air roof exhaust
RCU Upblast Roof Fan
10 verified 60Hz model sizes (RCU05 to RCU32)
Direct-drive & belt-drive motor options (0.25 to 10 HP)
Commercial kitchen grease & clean-air packages
Fan Category
Centrifugal Upblast Roof Fan
Product Series
RCU Series (CKS Fan Global)
Airflow Span
1,240 to 19,200 CFM (60Hz catalogue range)
Max Static Pressure
Up to 2.70 in. wg (675 Pa) on RCU32
Drive Type
Direct Drive & Belt Drive Options
Kitchen Suitability
Commercial Kitchen Grease Package Optional
Application Check

Is the RCU upblast fan suitable for your ventilation project?

Evaluate clean-air vertical exhaust, commercial restaurant kitchen grease hood requirements, and life-safety limitations.

Clean-Air Standard
Approved Clean Air
  • Commercial buildings, department stores, and institutional clean-air vertical exhaust
  • Warehouses, logistics facilities, and manufacturing plants requiring vertical roof plume
  • Equipment rooms, electrical substations, and mechanical penthouses
  • Enclosed parking structures and automotive service bays with vertical clearance
Kitchen Grease Package Required
Grease Package Specified
  • Commercial cooking grease hoods and restaurant kitchen exhaust systems
  • Requires motor isolated out of airstream with external weather-ventilated drive compartment
  • Requires grease drain spout, external grease collector box, and heavy-duty access hinge kit
  • Requires 450 mm (18 in.) high roof curb per NFPA 96 and Saudi Building Code standards
Special Certification Required
Life-Safety / Hazardous Review
  • High-temperature emergency fire smoke spill (requires Civil Defence approved VDO Smoke Fan)
  • Hazardous ATEX / IECEx explosive vapour environments (requires certified explosion-proof motor)
  • Highly corrosive chemical fume exhaust (requires polypropylene or 316 stainless steel fan)
  • Downward perimeter roof discharge (select RCD Downblast Roof Fan or Saudi Fan DH)
Kitchen Grease & Safety Boundary Notice: CRITICAL KITCHEN GREASE, SMOKE & HAZARDOUS AIR BOUNDARY: Standard RCU Series upblast fans are built for clean ambient air. For commercial cooking grease hoods, the optional Kitchen Grease Package (isolated motor, grease collection box, and access hinge kit) must be specified. Standard RCU fans are NOT rated for life-safety emergency smoke extraction or explosive atmospheres. Smoke spill requires project-specific certified high-temperature reports or Civil Defence approved smoke fans; hazardous areas require certified explosion-proof motors.
Airflow & Motor Performance

RCU Series 60Hz Verified Specifications Table

Complete documented performance matrix across all 10 model sizes from the official RCU 60Hz catalogue.

Swipe horizontally to view all model configurations and duty points.

ModelDrive TypeMotor PowerVoltage / Phase (60Hz)Fan RPMWheel Dia.Max CFM (0" SP)CFM @ 0.50" SPCFM @ 1.00" SPBase Curb CapCowl Dia.
RCU05Direct Drive0.25 HP220V-230V / 1-Ph1720 RPM11 inch1,240 CFM1,050 CFM850 CFM630x630 mm (24.8")700 mm (27.5")
RCU08Direct Drive0.50 HP220V 1P / 380V 3P1720 RPM12.5 inch2,600 CFM2,350 CFM1,950 CFM630x630 mm (24.8")700 mm (27.5")
RCU10Belt / Direct0.75 - 1.0 HP220V 1P / 380V 3P1400 / 172014 inch3,100 - 3,8002,600 - 3,4001,800 - 3,000630x630 mm (24.8")725 mm (28.5")
RCU14Belt / Direct1.0 - 1.5 HP220V 1P / 380V 3P1400 / 172016 inch4,000 - 4,8003,450 - 4,4002,600 - 3,900630x630 mm (24.8")725 mm (28.5")
RCU16Belt / Direct1.5 - 2.0 HP220V 1P / 380V 3P1300 / 172018 inch5,200 - 5,8004,700 - 5,4004,000 - 4,900712x712 mm (28.0")925 mm (36.4")
RCU18Belt / Direct1.5 - 2.0 HP220V 1P / 380V 3P1000 - 130020 inch6,000 - 7,8005,400 - 7,2004,500 - 6,600712x712 mm (28.0")925 mm (36.4")
RCU20Belt / Direct2.0 - 3.0 HP220V 1P / 380V 3P1130 / 125022 inch8,900 - 9,8008,100 - 9,1007,000 - 8,200838x838 mm (33.0")1130 mm (44.5")
RCU24Belt / Direct2.0 - 4.0 HP220V 1P / 380V 3P900 / 112025 inch10,600 - 12,0009,800 - 11,2008,500 - 10,400838x838 mm (33.0")1130 mm (44.5")
RCU28Belt / Direct3.0 - 7.5 HP220V 3P / 380V 3P750 - 112028 inch11,000 - 17,2009,500 - 16,0007,000 - 14,8001016x1016 mm (40")1283 mm (50.5")
RCU32Belt / Direct5.5 - 10.0 HP220V 3P / 380V 3P750 - 112032 inch13,000 - 19,20011,500 - 18,0008,500 - 16,8001016x1016 mm (40")1283 mm (50.5")
Engineering & Standards Notes: (1) Drive Selection: Direct-drive fans offer maintenance-free operation; Belt-drive models allow RPM balancing on-site. (2) Kitchen Package: Commercial cooking hoods require the external motor grease package with drain trough and hinge kit. (3) UL Scope: Tested in accordance with UL 705 and UL 762 standards; project-specific submittals confirm active listing.
Dimensions & Opening Schedule

RCU Architectural Dimensions & Opening Schedule

Dimensions in millimeters and inches for roof curb rough-in, base curb cap landing, and cowl clearances.

Swipe horizontally to view all dimensional values.

Model RangeBase Curb Cap (Square)Cowl DiameterOverall HeightRoof Rough-In OpeningImpeller DiameterMotor HP Range
RCU 05 / 08630 x 630 mm (24.8" x 24.8")700 mm (27.5")508 mm (20.0")480 x 480 mm (19.0")11.0" - 12.5"0.25 - 0.50 HP
RCU 10 / 14630 x 630 mm (24.8" x 24.8")725 mm (28.5")658 - 693 mm (26 - 27")480 x 480 mm (19.0")14.0" - 16.0"0.75 - 1.50 HP
RCU 16 / 18712 x 712 mm (28.0" x 28.0")925 mm (36.4")742 - 769 mm (29 - 30")560 x 560 mm (22.0")18.0" - 20.0"1.50 - 2.00 HP
RCU 20 / 24838 x 838 mm (33.0" x 33.0")1130 mm (44.5")827 - 873 mm (32 - 34")680 x 680 mm (27.0")22.0" - 25.0"2.00 - 4.00 HP
RCU 28 / 321016 x 1016 mm (40.0" x 40.0")1283 mm (50.5")1219 - 1256 mm (48 - 49")860 x 860 mm (34.0")28.0" - 32.0"3.00 - 10.00 HP
1. Roof Curb Height
Build minimum 450 mm (18 in.) high welded roof curb for kitchen grease hoods per NFPA 96 (minimum 300 mm for clean air).
2. Grease Collector Box
Install external grease collection trough below the scroll drain port; empty regularly during commercial kitchen maintenance.
3. Heavy-Duty Hinge Kit
Fit galvanized tilt hinge kit on curb landing to allow safe 90-degree tilting of the fan assembly for duct washdowns.
4. Liquid-Tight Wiring
Ensure liquid-tight flexible electrical conduit has sufficient loop length to allow the fan to tilt without disconnecting power.
Engineering Architecture

RCU Upblast Architecture & Grease Management

Engineered for high-velocity vertical discharge, motor isolation out of airstream, zero roof staining, and simple duct maintenance.

Vertical Upblast Air Discharge
High-velocity upward air projection geometry prevents contaminated exhaust air, heat, and grease vapor from contacting or degrading roof membrane surfaces.
Isolated Motor Compartment
Motor is mounted completely outside the contaminated airstream in a weather-ventilated aluminum dome with independent ambient cooling slots.
Backward-Curved Aluminum Wheel
Laser-cut aluminum alloy backward-curved centrifugal impeller dynamically balanced to ISO 1940 G4.0 delivers high pressure with non-overloading characteristics.
Integrated Grease Drain & Hinge Access
Continuous perimeter grease collection trough channels liquefied oil runoff to an external collection box, with heavy-duty hinge kits for duct cleaning.
Key Features

RCU Series Upblast Engineering Highlights

Precision manufacturing under ISO 9001 quality management with backward-curved aluminum impellers balanced to ISO 1940 G4.0.

High-velocity vertical discharge projects exhaust air upward away from roof membranes

Complete 60Hz model range (RCU05 to RCU32) covering 1,240 to 19,200 CFM at up to 2.70 in. wg SP

Direct-drive and belt-drive motor options from 0.25 HP to 10.0 HP with single- and three-phase power

Heavy-gauge spun and laser-cut corrosion-resistant aluminum alloy housing with galvanized drive cavity

Motor isolated out of airstream with independent continuous ambient air cooling ventilation

UL 705 and UL 762 test design compliance standards for commercial ventilation and restaurant grease

Optional commercial kitchen package with external grease collector box and heavy-duty tilt hinge kit

Compatible with prefabricated welded roof curbs (minimum 450 mm height for commercial kitchens)

Specifications

Category Technical Specifications

Comprehensive engineering specifications for RCU Series centrifugal upblast roof exhaust fans.

Swipe horizontally to compare all specifications.

SpecificationEngineering Details
Product CategoryRoof Fan
Product TypeCentrifugal Upblast Roof Exhaust Fan (Direct & Belt Drive)
Brand / SeriesRCU Series (CKS Fan Global)
Installation MountingRooftop curb mounting with welded perimeter landing
Air Discharge TypeVertical Upblast (high-velocity upward plume)
Airflow Range (0" SP)1,240 to 19,200 CFM across 10 model sizes
Static Pressure CapabilityTested from 0" up to 2.70" in. wg (0 to 675 Pa) on RCU32
Drive ConfigurationsDirect Drive (models 05–32) and Belt Drive (models 10–32)
Motor Horsepower0.25 HP to 10.0 HP (TEFC / ODP / Class F options)
Electrical Supply OptionsSingle-phase 220V–230V / 60Hz or Three-phase 220V / 380V / 60Hz
Casing ConstructionSpun & laser-cut aluminum alloy cowl and curb cap; galvanized motor cover
Impeller ConstructionBackward-curved centrifugal aluminum alloy wheel balanced to ISO 1940 G4.0
Commercial Kitchen PackageOptional: grease collector box, access hinge kit, and liquid-tight flexible loop
Compliance DocumentationCatalogue PDF, UL test reference, SASO COC, CR, and VAT certificates
Inclusions & Options

Standard Inclusions vs. Optional Kitchen Package

Clear distinction between factory-included standard equipment and optional commercial restaurant kitchen accessories.

Standard Inclusions (Base Package)
Included with every RCU unit from the factory
  • Spun Aluminum Upblast Discharge Cowl
  • Heavy-Gauge Spun Aluminum Base Curb Cap
  • Backward-Curved Centrifugal Aluminum Impeller
  • Standard Factory Drive Assembly (Direct or Belt Drive)
  • Galvanized Removable Motor Compartment Cover
  • Pre-Punched Perimeter Curb Mounting Holes
Optional Kitchen Grease Package
Specify during quotation review for commercial kitchen hood installations
  • External Grease Collector Box with Drain Fitting (Kitchen Package)
  • Heavy-Duty Galvanized / Stainless Steel Tilt Hinge Kit (Kitchen Package)
  • Prefabricated Welded Steel Roof Curb (450 mm Kitchen / 300 mm Clean Air)
  • Gravity or Motorized Backdraft Damper (Clean Air Applications)
  • Local Lockable IP65 Weatherproof Disconnect Switch
  • Epoxy or Phenolic Protective Corrosion Coating
Applications

Where RCU Upblast Fans Are Installed

Vertical rooftop centrifugal exhaust across commercial restaurants, institutional dining facilities, logistics warehouses, and industrial production plants.

Restaurant grease exhaust

Removes: Cooking grease vapors, smoke, food odors, and heat

Commercial kitchen hoods

Removes: High-volume hood steam, oil mist, and culinary exhaust

Commercial department stores

Removes: Solar heat buildup, stale air, and institutional ventilation

Warehouses & logistics

Removes: Trapped roof heat and general ventilation air through upward discharge

Industrial manufacturing plants

Removes: Clean process heat, equipment exhaust, and factory ambient air

Enclosed parking garages

Removes: Warm air, light vehicular exhaust, and utility room ventilation

Mechanical penthouses

Removes: Compressor heat, chiller plant air, and electrical room warmth

MEP project ventilation

Removes: Supplied with exact RCU model, duty point, and Saudi compliance docs

Airstream & discharge boundary: RCU Series upblast fans are built for commercial kitchen grease exhaust (with optional kitchen package) and clean ambient air vertical discharge. For general clean air without grease where downward discharge is preferred, select a Saudi Fan DH Downblast Roof Fan or RCD Downblast Roof Fan. For ducted low-pressure rooftop axial ventilation, select an Axial Roof Fan.
Selection support

What to Send for Correct RCU Upblast Selection

Provide design airflow (CFM) at system static pressure, application type (clean air vs. restaurant kitchen grease hood), drive preference, roof curb dimensions, and project city in Saudi Arabia.

01

Required exhaust airflow (CFM) at system static pressure (in. wg / Pa)

02

Airstream classification: clean air vs. commercial kitchen grease hood

03

Exact model code preference (e.g. RCU10 Direct vs. RCU14 Belt vs. RCU28)

04

Drive type preference: Direct Drive vs. Belt Drive (adjustable RPM)

05

Electrical supply: single-phase 220V 60Hz vs. three-phase 380V 60Hz

06

Roof curb outside dimensions (Base cap: 630 to 1016 mm square)

07

Kitchen accessories required: Grease Collector Box, Hinge Kit, Welded Curb

08

Quantity of fans required per roof zone

09

Project city and delivery schedule in Saudi Arabia

10

Submittal compliance requirements (Datasheet, UL test reference, CR, VAT, COC)

Downloads

Documents & Procurement Files

Download the official RCU 60Hz technical catalogue PDF and request technical submittal packages for engineering approvals.

RCU 60Hz Upblast Roof Fan Catalogue (2021 Catalogue — CKS Fan Global)Download PDF
RCU Technical Submittal & Performance CurvesRequest Submittal
Cloud Electricals Company ProfileRequest Profile
Saudi Commercial Compliance (CR/VAT/COC)Request Compliance Docs
RCU UL 705 & UL 762 Test Reference ScheduleRequest Test Schedule
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Saudi Fan DH Downblast Roof Fan
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FAQ

RCU Upblast Fan Questions

Answers for restaurant operators, HVAC consultants, MEP contractors, and procurement engineers reviewing RCU upblast roof exhaust fans in Saudi Arabia.

An upblast roof fan (like the RCU series) discharges exhaust air vertically upward at high velocity, projecting grease, heat, and contaminants away from the roof membrane. A downblast roof fan discharges air downward around its perimeter, making it ideal for clean general ventilation but unsuitable for grease-laden air.

Quotation Request

Request RCU Upblast Roof Fan Quotation

Send your required RCU model (RCU05 to RCU32), design airflow (CFM), static pressure (in. wg / Pa), application type (Clean Air vs. Kitchen Grease Hood), drive preference, voltage/phase, and project city in Saudi Arabia.

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