... /1800 number of tubes121520Gross size(mm)1010*1980 (W*L)1235*1980 (W*L)1610*1980 (W*L)aperture area M21.1081.3971.876Absorber area M20 ... 603flat roof installation size1420*1010*1420mm (L*W*H)1420*1235*1420mm (L*W*H)1420*1610*1420mm (L*W*H)weight empty (KG)40.75664 ... glass tubeHigh boron-siliconCoating of absorber on glass tubeAl-N-Al,Copper,Stainless steelfins around heat pipesingle long Aluminum(1.68m ...