Have just completed installation of a system with a Navitron 20 tube panel.
Absolutely no trouble to install.
22mm fittings on collector and pump, 15mm tubing. So needs additional 22-15mm adaptors + Fe-cu fittings for pressure vessel.
Garden-type pressure sprayer with adaptor used to pressurise/fill system.
Kit cost ~ £1200 + additional £105 for fittings and tube. Fortunate to have roof access via roof window. Safety rails built through opening with 10' scaffolding poles.
Yesterday, with clear sky and outside temperature 6C, system produced 120L at 59C. Max collector temperature 72C. Not so good today, 10/10 cloud cover a.m, ~ 9/10 cloud p.m. Max collector temperature 35C giving 120L at 23C.
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