1, if the fin of the steel fin tube radiator is too high and too dense, it is easy to produce ash accumulation problem, and it is difficult to remove ash.

2, the fin of the steel fin tube radiator is too high and too dense, which will increase the difficulty of the process and increase the processing cost.

3, when the heat transfer area of the steel fin tube radiator fin is doubled, the heat transfer coefficient can not be doubled, but to play a discount,

 generally (0.9-- 0.7), and the higher the fin, the greater the discount value, even down to (0.5). This shows that the higher the fin, the lower the fin efficiency, and the economy of increasing the fin decreases.

For A 1 meter long pipe, the total heat transfer area after increasing the steel fin tube radiator fin is A, and the optical tube area without increasing the fin is A0, 

then A/A0 is the multiple of the area expansion, called the finning ratio. The appropriate finning ratio is determined by application conditions and optimal design.

 In general, the finned tube applied in energy engineering has a finning ratio between 5-- 12, and in the air conditioning and air cooling industries, its finning ratio is between 15 -- 22.

The answer is no. It's not that more is better, and it's not that higher fins are better.