Polygreensolar Low cost Evacuated solar hot water systems
The advantage with a round glass tube system to a flat plate system
• Equipped with world advanced three target interference film the vacuum tubes are greatly improved with its heat absorption and capability up to 94%.
• The inner tank is made from SUS304 grade stainless steel
• the outer tank is steel
• Highly efficient insulation with high pressure constant temperature and fixed quality integrated polyurethane foaming technology.
• High wind snow and hail performance
• shorter pitches between the tubes, cancel reflector loss
• Long service life 10 to 15 years … but hard water will shorten its life but that is with all other hot water systems
Please see the diagrams below
Flat plate looses a lot of the sun Round tube catches more sun for longer