Radiator Specification

Due to the manufacturer’s constraints, only the parameters highlighted are variable.



Length of the Tubes, L 210 Mm
Width of the radiator, W 168 Mm
Depth of the Tubes, Dt 22     Mm
Depth of the Radiator, D 22 Mm
No of Rows 1  
No. of tubes, N 16  
No. of fins per inch, Fn 22  
Tube thickness, T 2 Mm
Tube wall thickness, Tw 0.32 Mm
Fin thickness, Ft` 0.1 Mm
Fin length, Fl 8 Mm
Lower length, Ll 4 Mm
Lower angle, La 32.00 ˚  
Lower pitch, Lp 1 Mm
No. of columns of fins, Fnc 26  
Tube pitch, Tp 10 mm
Fin pitch, Fp 1.1545 mm
No.of fins, Nf 2811  


  • Depth through which Water flows, Dwf = Dt – (2*tw)
  • Thickness through which Water flows, twf = tt – (2* tw)
  • Cross-Sectional Area of a Tube, At = twf * Dwf
  • The perimeter of a Tube, Pt = 2*(twf + Dwf)
  • Number of Fins, nf = (Fn/25.4)*L*Fnc
  • Cross-Sectional Area of Fin, Af = (pf*lf)
Depth Through Which Water Flows, Dwf 21.36 mm
Thickness Through Which Water Flows, twf 1.36 mm
Cross-Sectional Area of a Tube, At 29.0496 sq. mm
The perimeter of a Tube, Pt 45.44 mm
Cross-Sectional Area of Fin, Af 0.8 sq. mm
The perimeter of Fin, Pf 16.2 mm
Fin Contact Perimeter, Pfc 44.2 mm
Fin Contact Area, Afc 2.2 sq. mm
Total Frontal Area, A 35280 sq. mm
Blocked Area, Ab 8968.8 sq. mm
Total Air Flow Area, Aflow 26311.2 sq. mm
Surface Area of Fins, Asf 989472 sq. mm
Prime Surface Area of Radiator, Aps 152678.4 sq. mm
Total Surface Area, Ar 1142150 sq. mm
Water flow Area, Aw 464.7936 sq. mm
Hydraulic area of air 10.16 sq. mm
Hydraulic Perimeter of air 18.54 mm


  • Fin Contact Perimeter, Pfc = 2*(D + tf)
  • Fin Contact Area, Afc = (D*tf )
  • Total Frontal Area, A = (L*W)
  • Blocked Area, Ab = (tt*L*nt) + (lf*tf*nf / 2)
  • Air Flow Area, Aflow = (A – Ab)
  • Surface Area of Fins, Asf  = 2*(D*Nf*Fl)
  • Prime Surface Area of Radiator, Aps  =(L*D*Pt)
  • Total Surface Area, Ar = (Asf + Aps)
  • Water flow Area, Aw = ( N*At )
  • Hydraulic area of air = (Fl* Fp)
  • Hydraulic Perimeter of air = 2*(Fl+ Fp)

How thick is too thick?

Many presume that thick radiators are packed with super-powers and will bring extreme cooling performances, but things are more complicated than that. But why is it so? In a push configuration, cold air is pushed in by a fan from one side of the radiator and warm air leaves at the other side of the radiator. Heat is being transferred from the liquid to the radiator fins, and onto the air that is pushed through by the fan

Imagine that an XE 120 60mm thick radiator is actually three slim radiators packed on top of each other. As the fins are being cooled from bottom to top, the air that passes through the radiator is being warmed up. This means that when the air reaches the third and last radiator in the imaginary stack, it’s not cool enough to provide efficient cooling. If you remember,  the greater the difference between the coolant temperature and the ambient temperature, which is the temperature of the air passing through the radiator, the better the cooling performance you will have.

By using a thick radiator, the bottom part of it, in this case, will have better cooling while the top is less efficient.

Of course, if you can, it’s good to spread out and get Slim radiators instead of grouping your cooling into one thick radiator. But it all comes down to the personal choice and case limitations.

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