Horizontal evacuated-tube solar collector (butterfly)

A high-performance, economical solar collector, easy to install and operate and highly reliable. It works with free (thermosiphon) systems with a tank above it, or with direct and indirect forced unpressurized or low-pressure systems. It consists of double evacuated glass tubes placed horizontally on both sides of a stainless steel manifold insulated with polyurethane and clad in galvanized sheet or stainless steel. More than one collector can be connected in series to increase the amount of hot water, and it is installed on all types of horizontal and sloping roofs (0-90°). Suitable for domestic sanitary use and commercial applications such as hotels and residential complexes, swimming pool heating, support of underfloor heating systems and some industrial applications.