There are  two types of collectors on a solar hot water system – flat panel or evacuated tubes.  Let’s talk about evacuated tubes.

  • A tube absorbs solar energy and converts it to heat.
  • A tube consists of two layers of glass with a vacuum between the layers which insulates against heating loss.
  • A copper vacuum pipe transfers the heat from within the evacuated tube up to the copper header pipe inside the insulated manifold box.
  • A pump circulates water from the storage tank to the copper pipe and heats the water.  The solar heated water is then pushed down into the storage tank ready for use.