Dundar CM 21.4H Hot Environment Radial Snail Fan (Single Phase) 120 Degrees 1575 m³ 1390 RPM

 

 

MODEL	C	D	E	H	L	O	P	S	T
CM 21.4H	420	265	360	420	198	220	200	150	169

 

What is a Hot Environment Fan?

Dündar Hot Environment fans are specially designed centrifugal fans capable of handling temperatures up to 120 degrees. They are used for ventilating and cooling existing environments.

Applications of Hot Environment Fans

• Hot air discharge in environments with high temperatures
• Duct applications where axial fans fail to provide sufficient pressure and airflow
• Solid fuel boiler systems

Fan Casing and Impeller

• Enhanced performance with an intermediate cooling impeller that prevents heat transfer from the radial casing to the motor
• High-quality cold-drawn DKP steel radial casing
• High corrosion resistance with environmentally friendly, high durability electrostatic epoxy powder coating
• Advanced dynamic testing (ISO 1940 standards) for the forward-curved radial impeller
• High pressure and airflow values achieved through nozzle applications at the air intake
• Robust and smooth casing design through special flange joining

Low Noise Level

Motor

• High-quality production using advanced CNC machines
• High thermal conductivity aluminum rotor motor body
• Insulation class F for extended operating range (-40° to +70°)
• Fan Selection Considerations
  Four parameters should be considered when selecting a fan:
• Required Airflow
• Pressure Loss
• Acceptable Noise Level
• Electrical Power Connection Type

For ventilating environments, the required airflow is determined based on the environment’s purpose, the number of occupants and activities. The following table provides air change factors for different environments:

Environment	Air Change Factor
Auditoriums	6-8
Paint Booths	25-50
Safe Deposit Rooms	3-6
Cinemas and Theaters	5-8
Commercial Kitchens	15-30
Foundries	8-15
Gymnasiums	4-6
Laundries	10-20
Indoor Pools	3-4
Restaurants	8-12
Conference Rooms	6-8
Waiting Rooms	10-15
Machinery Rooms	10-40
Shops	4-8
Dry Cleaning	5-15
General Workshops	4-8
Hospitals	8-12
Laboratories	8-15

Based on these factors, the required airflow can be calculated as:

Q [m³/h] = Air change factor * Volume (m³)

or

Q [m³/h] = Number of people × required airflow per person

Once the required airflow is determined, suitable duct design must be made considering sound and air velocity criteria, and pressure losses must be calculated. Based on the environment, the fan type (axial, radial, roof, smoke extraction, etc.) should be selected according to the specified airflow-static pressure curve.