A comment
I want to refute the popular opinion about Chinese-made radiators. Wherever you look - mostly negative reviews.
In our apartment with an autonomous heating system for two winters there are four-section aluminum radiators WARMICA LUX 70/500. We chose them solely because of the low price, since at that time we were experiencing financial difficulties. And since the old batteries had to be changed urgently, there was no time to study the reviews. Two winters were quite successful. For such a low price, radiators are quite normal. True, the heating is uneven. The bottom is heated much less than the top. But this does not interfere with the normal warming of the rooms. Even when there were big frosts, the apartment maintained a normal temperature.
Now, in our financial capabilities, we could change our WARMIC to more "advanced" ones, but so far they look pretty decent and warm up normally.