The unit of measurement in the scene is millimeters.
Render - Corona 9 (all materials - Legacy).

In the model file of two-pipe radiators:
- 4 sections (78 mm x 227 mm x 1800 mm) = 47000 polygons;
- 5 sections (78 mm x 270 mm x 1500 mm) = 49000 polygons;
- 7 sections (78 mm x 358 mm x 1200 mm) = 55000 polygons;
- 9 sections (78 mm x 446 mm x 900 mm) = 60000 polygons;
- 12 sections (78 mm x 577 mm x 500 mm) = 69000 polygons;
- 15 sections (78 mm x 709 mm x 300 mm) = 77000 polygons;

+ 10 spheres with warm and cold color palettes.

Easy to edit:
- number of sections (each section is a separate object)
- radiator height
- paint color (changes in corona color)

Brand - Solira:
https://www.warm-market.ru/collection/solira-stalnye-trubchatye-radiatory/product/vertikalnyy-trubchatyy-radiator-solira-2150-n12-bokovoe-podklyuchenie-tsvetnoy