The most flexible and adaptable of vacuum tube panels, U-tubes can be mounted at any angle, blending in to restricted access areas, with any system from thermosiphon to in floor heating. U-Tube series are all-glass evacuated tubular collectors with copper U tubes inside.  Fluid circulates from the header to the bottom of the tubes, then makes a U-turn back up.

U-Tube Panels have passed Solar Keymark European certification, efficiency and durability testing and are on the CSA approved list of solar energy water heater panels. 

Copper U tubes can stand high working pressures-up to 6 bar (0.6 Mpa) and also work with natural thermo-siphon (circulation by hot water rising) applications.

· Graded Al-N/Al selective coating, high energy absorption and low heat transfer losses

·  highly evacuated with pressure ≤5×10^-2 Pa in the space between outer and inner covers, so no heat loss

·  High transparency with boron silicon glass, high resistance to cold water shock

·  High 6 bar pressure capable

·  U tube panels can be joined in series

·  Use for pools, thermosiphon systems

·  Use in pressure split systems