Useges : Domestic Solar wter heater Type : Evacuated Tube collector Outer cover :Surface Plastic Painting Insulation : Polythrethane Material : Borosilicate Glass 3.3 Glass Thickness :1.6mm Absorptive Coating :Graded A1-N/A1 Vacuum tubes : 30pieces Mounting :Flat roof mounting set Heating : 1.5kW Electric Heater in the Solar Hot Water Tank Absorber Area : 3.28m2 Number of tubes :30 Capacity : 375Ltr Manufacturing Guarrantee : 5 Years Manufacturing Warranty : 10 Years Maintaince & Delivery Charge : FREE ( ONLY inside of kathmandu Valley) Dimensions (cm):241x145x168 td {border: 1.0px solid #cccccc;} br {mso-data-placement: same-cell;} Ultrasun vacuum Tube solar hot water systems are the most efficient water heating systems available. Solar energy is captured in the vacuum sealed glass tube, quickly heating the water in the glass tube. The heated water rises to the top of the pipe and collects in the tank. Even in colder months, evacuated tube systems work very efficiently, minimising reliance on gas or electric boosting. Vacuum glass tubes provide superior daily heat output due to the cylindrical absorber shape always being perpendicular to the sun (Positive Sun Tracking) and insulation properties of the vacuum in the evacuated tube allow up to 97% of the heat from the sun to be retained. The large surface area of the vacuum and high water turbulence within the internal chamber provide rapid transfer of heat to the water flowing through the top manifold. The sealed evacuated tubes and tri-oxide coating provide maximum solar gain even in the coldest areas and during cloudy or overcast days Brand Ultra SKU 100100490_NP-1020362236 Model US30T