01GT Green Fan · carbon fibre composite axial fans

Cooling tower fans, re‑engineered in carbon fibre.

At least 25% less energy at the same airflow. Guaranteed. We replace only the fan and hub.

Request a site assessment See field results

02The tower

Above every cooling tower, a fan does the work.

In an induced-draft cooling tower the fan pulls all of the air up through the falling water. It is the tower's main electrical load, so every kilowatt it saves is saved for every hour it runs.

  • Field-erected towers
  • Packaged towers
  • Air-cooled condensers
  • Ventilation

03The loop blade

A loop, not a blade.

Two flat carbon fibre plates run one above the other, with an open gap between them. A flat cap closes the loop at the tip. At the root a flat end closes it, and a short round shank carries the blade into its aluminium clamp.

  • Patented in the US, EU and Türkiye
  • Carbon fibre composite
  • Adjustable pitch

04The power

Same air. At least 25% less power.

At the same airflow a GT Green Fan draws at least 25% less power than the conventional fan it replaces. That is guaranteed. Or keep the power and set the pitch for 5–20% more airflow.

Conventional fan
100 kW
GT Green Fan
75 kW

05The weight

Lighter on everything it touches.

A GT Green Fan weighs less than half as much as a conventional fan. Less load on the gearbox, shaft and bearings, easier maintenance, and a simpler lift onto the tower.

Configure a fan Estimate your savings
  • Guaranteed 25%+ lower kW at the same airflow
  • Field results 26–39% energy saving at our reference installations
  • Or more air 5–20% more airflow at the same kW, by changing the pitch
  • Weight <½ the weight of a conventional fan
  • Diameter Ø1.65–11 m 3 to 9 blades on one aluminium hub

Side by side

Conventional fan or GT Green Fan.

The same tower, the same airflow, the same 8,000 hours a year. Only the fan and hub change.

Conventional fan

100kW

fan power

Energy per year
800,000 kWh
Airflow
100%
Fan weight
100%
GT Green Fan

75kW−25%

fan power, same airflow

Energy per year
600,000 kWh
Airflow
100%, the same air
Fan weight
Under half
Saved every year200,000 kWh
CO₂ avoided88 t
Or keep the power5–20% more air

Example: one fan drawing 100 kW, running 8,000 hours a year, at the guaranteed minimum saving of 25%. CO₂ at 0.44 kg per kWh. Every reference installation on this page saved more than this.

Field results

Some installations. Every one above the guarantee.

25%+

guaranteed, and more is possible. Savings at our reference sites range from 26% to 39%.

Energy saving per siteGuaranteed 25%Above the guarantee
Energy saving per site after replacing conventional fans with GT Green Fans
SiteEnergy saving
Corrugated cardboard plant39%
Chemical plant35%
Steel plant34%
Polyester plant33%
Petrochemical plant33%
Refinery32%
Bank headquarters31%
Textile plant30%
Power plant30%
Power plant28%
Cement plant27%
Power plant26%

The sites

  • GT Green Fan installed at a corrugated cardboard plant
    0139%Corrugated cardboard plant
  • GT Green Fan installed at a chemical plant
    0235%Chemical plant
  • GT Green Fans installed at a steel plant
    0334%Steel plant
  • GT Green Fan being lifted onto a cooling tower at a polyester plant
    0433%Polyester plant
  • GT Green Fan installed at a petrochemical plant
    0533%Petrochemical plant
  • GT Green Fan installed at a refinery
    0632%Refinery
  • GT Green Fan installed at a bank headquarters
    0731%Bank headquarters
  • GT Green Fan installed in a ring casing at a textile plant
    0830%Textile plant
  • GT Green Fan on a crane hook above a concrete cooling tower at a power plant
    0930%Power plant
  • GT Green Fan installed in a concrete fan stack at a power plant
    1028%Power plant
  • GT Green Fan installed at a cement plant
    1127%Cement plant
  • GT Green Fan installed at a power plant
    1226%Power plant

Energy saving per site after replacing conventional fans with GT Green Fans. Customer references from Türkiye's Top 500 companies are available for each industry.

What “guaranteed” means

01 The figure
At least 25% less power than the conventional fan it replaces, at the same airflow.
02 The baseline
Your existing fans, measured in the site assessment.
03 The scope
Only the fan and hub change. Motor, gearbox, shaft and tower stay as they are.
04 The evidence
Every result above is the energy saving at that site after replacing its conventional fans: 26% to 39%.

Our customers

Trusted by Türkiye’s leading industrial companies.

Companies our team has worked with on fans, motor efficiency and energy projects.

  • Sunar Mısır
  • Ekinciler
  • KÇS
  • Habaş
  • Döhler
  • Limak Çimento
  • Cemak Enerji
  • Ekomas
  • Mefa
  • Enerjisa
  • Modern Karton
  • Ferrero Rocher
  • Kardemir
  • Diler Holding
  • BASF
  • Meltem Kimya
  • Asaş
  • Omnia
  • Tezkim
  • Ford Otosan
  • Cemtaş
  • İsdemir
  • Medcem Beton
  • Tosyalı Holding
  • Zorlu
  • Teknosa
  • Nuh Çimento
  • Yıldız Holding
  • Tosçelik
  • Eczacıbaşı
  • A101
  • Adopen
  • Algida
  • Aroma
  • Client logo
  • Bahçıvan
  • Çanakkale Seramik
  • Çimentaş
  • Erikli
  • GDG
  • Greif
  • Gülsan
  • Indorama Ventures
  • Karper
  • Kastamonu Entegre
  • Kutaş
  • Medical Park
  • Migros
  • Oyak Renault
  • Pladis
  • SASA
  • ŞOK
  • Tamcam
  • TAV

Configurator

Configure a GT Green Fan

Every fan is sized to the tower: diameter from 1,650 to 11,000 mm, 3 to 9 blades, pitch set on site for maximum savings or extra airflow.

Assembled GT Green Fan, Gebze factory
Blades3 – 9
6,000 mm
0°
Set the pitch for
Diameter
6,000 mm
Blades
6
Result
At least 25% lower kW, same airflow
Request a site assessment

Savings calculator

What would GT Green Fans save on your site?

Enter your fans and your tariff. The estimate starts at the guaranteed 25%; move the saving slider to see what the field results suggest.

kW
8,000 h
80%

Fans rarely run at full motor power all year. Set the average share of the motor rating they draw.

Currency
EUR/kWh
25%

25% is guaranteed; the reference installations range from 26% to 39%.

Method: fans × motor power × average load × hours per year × saving. CO₂ at 0.44 kg per kWh, from the Turkish Ministry of Energy’s 2023 emission factors for electricity consumers (0.436–0.469 kg CO₂e per kWh). Example: one fan with a 110 kW motor at 80% average load draws 88 kW; over 8,000 hours a year at 25% it saves 22 kW, or 176,000 kWh a year. The 10-year chart holds the tariff flat. Fan motors only: the lower load on gearbox and bearings and the lower maintenance are not counted.

Estimated annual saving

€105,600

€26,400 and 176,000 kWh per fan

Fan power88 kWless demand, all fans together
Electricity704,000 kWhsaved per year
CO₂310 tavoided per year, approx.
Energy cost over 10 yearsConventionalGT Green FanSaved
Request a site assessment

An estimate from your inputs. A site assessment measures your fans and works out the figures for your towers.

On site

From our factory to your tower.

Each fan is assembled on its own hub in Gebze, lifted onto the tower and pitched on site. Nothing else on the tower changes.

  1. Assembled GT Green Fan on a stand in the Gebze factory
    01

    Assembled in Gebze

    Each fan is built up on its own aluminium hub in our factory.

  2. Assembled GT Green Fan lifted by crane, seen from above
    02

    Lifted in

    The fan goes onto the tower by crane. At under half the weight of a conventional fan, the lift is simpler.

  3. Aluminium hub on an installed fan: each blade shank held in a two-piece clamp block
    03

    Clamped and pitched

    Every blade shank sits in a two-piece aluminium clamp. The pitch is set on site for maximum savings or extra airflow.

Site footage

A GT Green Fan at work on a cooling tower.

Installations

01 / 06

The product

GT Green Fan

A drop-in replacement for the fans on existing towers, and a way to design smaller new ones.

01Upper member 02Open gap 03Lower member 04Tip cap 05Flat root end 06Round shank 07Two-piece aluminium clamp
Loop blade, side view · schematicCarbon fibre composite · aluminium hub · patented in the US, EU and Türkiye
  1. 01Upper member
  2. 02Open gap
  3. 03Lower member
  4. 04Tip cap
  5. 05Flat root end
  6. 06Round shank
  7. 07Two-piece aluminium clamp
Design
Continuous loop blade: two carbon fibre plates with an open gap, tip cap, flat root end, round shank. Patented in the US, EU and Türkiye.
Patents
US: allowed by the USPTO in 2023, application 17/832,736.
Europe: EP 4242467, granted and validated in Italy and Spain in 2024.
Türkiye: patented.
Material
Carbon fibre composite, GT green finish
Diameter
1,650–11,000 mm
Blades
3 to 9, adjustable pitch
Hub
High-durability aluminium, two-piece clamp per blade
Mounting
Vertical or horizontal
Weight
Less than half that of a conventional fan
Installation
Replaces the existing fan and hub. No other mechanical change.
Guarantee
At least 25% lower kW at the same airflow. Or 5–20% more airflow at the same kW, set by pitch.
Scope of supply
Blades, aluminium hub and two-piece clamps, assembled on the hub in Gebze. Also supplied in a ring casing.
Used in
Field-erected and packaged cooling towers, air-cooled condensers, climate control and ventilation
Services
Site assessment, motor efficiency analysis, GHG Protocol carbon monitoring
  • Large GT Green Fan on a cooling tower fan deck
    Range 01

    Cooling tower fans

    Ø1,650–11,000 mm with 3 to 9 blades, for field-erected and packaged cooling towers and air-cooled condensers.

  • GT Green Fan mounted in a ring casing on a stand in the factory
    Range 02

    Ring-mounted fans

    The same loop blade and aluminium hub, supplied in a ring casing.

Benefits

Savings that reach beyond the electricity bill.

On existing towers

  • At least 25% lower kWat the same airflow, or 5–20% more airflow at the same kW.
  • Less load on the drive trainGearboxes, shafts and bearings carry a lighter fan.
  • Easier maintenanceLower maintenance costs over the life of the fan.
  • A cooler VFDWhere the motor runs on a drive, the drive runs cooler and lasts longer.
  • A lower carbon footprintLess electricity, fewer emissions.

On new towers

  • Smaller motorsLower power demand means a lower-rated motor.
  • Thinner cables, smaller drivesLower current allows a smaller cable cross-section and a smaller VFD.
  • A more compact towerHigher airflow per fan allows a smaller tower design.
  • Easy assembly and transportUnder half the weight of a conventional fan.

Company

Engineered and built in Türkiye.

GT Carbon Fan exhibition stand with a GT Green Fan loop blade on display
GT Carbon Fan at an industry exhibition

GT Karbon İzleme ve Enerji Verimliliği Corp. (GT Carbon Fan) was founded in 2018 in Istanbul to produce high-efficiency axial fans. The GT Green Fan was first built in FRP, then in carbon fibre composite. Every fan is engineered by GT Carbon Fan, built on its own aluminium hub in our Gebze factory and pitched on the customer’s tower. Its founders and engineers bring 30 years of experience in industrial energy efficiency.

Founded
2018
Istanbul
Production
Gebze
Kocaeli, Türkiye
Design
Patented
US · EU · Türkiye
Customers
Top 500
references from Türkiye’s Top 500 companies, by industry

Services

  • Site assessmentWe measure your existing fans and work out the figures for your towers.
  • Motor efficiency analysisHow much of the power your motors draw turns into useful work.
  • GHG Protocol carbon monitoringCarbon monitoring for your site, to the GHG Protocol.

Industries

Energy saving at the reference site

Site assessment

Let us measure your fans.

Send a few details about your towers and our engineering team will contact you.

LinkedIn
GT Karbon

What happens next

  1. 01
    We get in touch

    Our engineering team contacts you about your towers.

  2. 02
    Site assessment

    We measure your existing fans and work out the figures for your towers.

  3. 03
    Proposal

    A fan sized to each tower: diameter, blade count and pitch. At least 25% lower kW at the same airflow, guaranteed.

  4. 04
    Installation

    Assembled on its own hub in Gebze, lifted in by crane and pitched on site. Only the fan and hub change.

Required: name, company, email. Fan details are optional.