This product Qty. of solar tubes 20pcs --------------- Flat panel solar ------------------ Diameter of solar tube 70mm -------------- Length of solar tube 1.7M ----------------- Qty. of solar tubes 30pcs ---------------- 1) Metal-glass evacuated tubes with Heat pipe provide 10% higher efficiency solar collection than normal all-Glass tubes ---------------- 2) Able to be used in all climates ----------------- 3) Copper Heat pipes for rapid heat transfer ------------------ 4) Easy plug-in installation for mounting on the roof or at ground level ------------------- 5) Maintenance free ------------------ 6) Suitable for mains pressure water (up to 8bar / 116psi) --------------------- 7) Corrosion resistant silver brazed copper header --------------- 8) Frame material: 304 2B grade standard steel ---------------- 9) Casing material: 304 2B stainless steel ----------------- 10) Excellent insulator in glass wool -------------------- 11) Collectors may be connected in series to increase water heating capacity --------------------- 12) Tubes easily replaced if broken - can be used with broken tubes --------------------- 13) Ideal for commercial solar water heating applications -------------------- If you are interested in our products, you can come to our official website, official website of the above can also contact information to understand the products you need more information. ------------ http://www.china-solar-water-heater-product.com |