This web page is referring to Standard Solar Tanks with Liquid Capacity from
80 Li (20 Gal.) to 300 Li (80 Gal.).
Types: Horizontal, Vertical, Open Loop, Single Closed Loop, and Double
Built-In Heat Exchangers. For: domestic, industrial and commercial utilization.
Also Electric filled Boilers from 30 Li (8 Gal.) to 300 Li (80 Gal) Capacity.