Best efficiency vacuum tube solar collector

ONOSI solar collector incorporates a number of high efficiency all-glass tubes, low pressure header manifold and supporting bracket.
ONOSI solar collector is specially designed for active open loop heating systems, in which the water is heated directly inside tubes and stored in a separated tank;
The solar collectors are usually connected together in series and parallel to form large-scale heating systems, supplying hot water for hotels, factories, hospitals, schools, swimming pools, room or floor heating applications.