Features:

Much better performance in heat transmitting than metal heatpipe.

Larger quantity of heat participate in heat exchanging with waterin tank, compete with common vacuum tubes, nearly all the heatabsorbed by the glass heat pipe takes pert in the exchange with thewater in the storage tank at all.

Truly steady and long-life tube. Single tubes broken in accident,the water heater still can work, the tube will not broken even thetemperature drops to -50degree, you can fill the water into thestorage tank at any time and no breakage will occur.