A comment
In a private house, when replacing the heating system, I ran into a problem. It was initially tuned to aluminum radiators, but the guys said that because of the quality of our water, they won’t last long. Therefore, he took the GH VIERTEX A80-500 bimetal, the more the price for them is divine. And the manufacturer inspired confidence.
Mounted them without a hitch, did not even think that everything is so fast. They look very good overall. I meticulously examined each, the colorful coating was applied qualitatively, there were no smudges and irregularities, the thread was smooth.
During the period of operation there are no complaints, the house has become much warmer. I was afraid that they would not withstand the pressure drops, but in vain everything is fine. So I think that I was not mistaken in the choice, I hope they will last a couple of decades.
pros
price, attractive appearance, good heat dissipation, durability