Increased efficiency: due to the tabular shape of the evacuated tubes they capture sunlight better as they have a greater surface area exposed to the sun at any time.
Minimum heat loss: since air is evacuated from the glass tubes to form a vacuum, it reduces heat loss from the tube.
Not affected by wind and frost as they can be used in subzero temperatures.
Require a smaller roof area than flat plate collectors.
Less affected by limewater.
More durable (20 year life span) and cheaper to repair.
A controller can adjust the hot water quantity.
Inner tank is made of stainless steel and therefore does not have the same level of moisture, condensation and corrosion problems as other collectors.
