The performance of a flat plate collector is close to that of an evacuated tube collector in the summer months when facing due south.
Evacuated tube collectors have better overall results in both early and late season and they are not affected by adverse weather conditions and even produce impressive temperatures on cloudy days.
The flat plate collectors are exceptionally sturdy and durable, perhaps more suited to vulnerable locations.
This information is intended as a guide only, it does not imply compliance with water or gas installation regulations.
Components will vary depending on the actual installation.
Check local regulations before installation.