The Leader in Factory Cooling & Industrial Ventilation

Roof Exhaust Fans

作業場を快適に保つ「空気交換」に欠かせない Roof Exhaust Fan「屋根用排気ファン」。天井に溜まる熱く汚れた空気を屋根から外に送り出します。

Roof Exhaust Fan Motor Belt-Driven Centrifugal Design Elegant Design Aluminum Housing

Roof Exhaust’s Features

美しい外観

上品な外形が屋根の輪郭線を美的に見せます。

遠心設計

静圧が高く、遠心設計されたこのファンはダクトを取付けその効果を広範囲に渡って適用することができます。

ベルト駆動

ベルト駆動を利用する設計が低速度、すなわち低ノイズでの稼働を実現します。

モータの設置場所

モーターは空気流の外側に設置してあります。特に排出される空気が埃やその他の空中浮遊粒子で汚れている場合はこれによりファンの長寿命を保証します。

アルミニウム製の筐体

ファンホイールおよび筐体にはアルミニウム合金を使用しています。軽量かつ金属製の屋根架構への荷重も最小限に抑えてあります。

溜まっている熱気を除去する最も効果的な方法

弊社のある地元の気候では、工業用鉄骨建造物の金属屋根の温度が日中で最高80 ˚Cまで上がります。この屋根がその熱を建造物の中へと放射するため、屋内に熱気の層が形成されてしまいます。この結果として生じる熱気の上層部分は屋根の中心線に合わせて設置された屋根用排気ファンで取り除くのが最も効果的であると言えます。

CFD Simulation & Finite Element Analysis Technology

Our manufacturing partner in China uses computer-aided air movement simulation model to calculate the efficiency pf the fan based on the number of blades, blade angle, with, and sound level. It also analyses and provides accurate prediction of how material is likely to respond when subjected to structural and/ or thermal loads

プロジェクト例

Why The Centrifugal Roof Fan Is Better Than Other Alternatives?

Wall Exhaust Fan
Versus
Centrifugal Roof Fan

Wall Exhaust Fan

In our local climate, heat gets trapped just underneath the metal roof of an industrial building and can get as hot as 80˚C in the middle of the day. Wall Exhaust Fans will be unable to effectively remove all of this heat because it is stratified to the top of the building and not at the walls.

Centrifugal Roof Fan

The resultant upper layers of hot air are most effectively removed with roof exhaust fans installed along the roof center line. Our centrifugal roof exhaust fans can produce the pulling power to remove the heat where it matters.
Axial Roof Fan
Versus
Centrifugal Roof Fan

Axial Roof Fan

Electric motor is in the air stream and subject to the hot and maybe contaminated air.
Axial fan blades cause air turbulence and backward flow before air is discharged

Centrifugal Roof Fan

Electric motor is located outside the air stream.
Centrifugal fan blades delivers a smooth downward exit air flow
Wind Driven Fan
Versus
Centrifugal Roof Fan

Wind Driven Fan

Wind Driven Fan depends only on strong wind velocity to work.
Even under strong wind velocity, air flow through the unit is very small (200 m3/h)
When the bearing of the unit ceases up, rain water will go pass the roof.
Wind Driven Fan does work in house attic but fail badly in all industrial buildings

Centrifugal Roof Fan

Centrifugal Roof Fan produces high torque pulling power to discharge large amount of heat and contamination.
Centrifugal Roof Fan guarantees that it can discharge air all day long and is not dependent on weather factors.
No leakage issues with the Centrifugal Roof Fan design

Dimension & Weight

Models
CRF-575-0.75-GT
CRF-675-1.5-GT
CRF-750-2.2-GT
A (mm)
940
1100
1200
B (mm)
890
995
1000
C (mm)
750
900
900
D (mm)
70
53
53
Weight (kg)
62
84
92

Technical Data & Performance

Models
CRF-575-0.75-GT
CRF-675-1.5-GT
CRF-750-2.2-GT
Air Flow (m3/h)
10,000
15,000
15,000
Static Press (Pa)
50
100
100
Fan Speed (rpm)
781
725
720
Noise Level
Point A
63 dB (A)
65 dB (A)
70 dB (A)
Motor (kW)
0.75
1.50
2.20
Ph/Voltage
3Ph/380V
3Ph/380V
3Ph/380V

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