Freeze protection is generally unnecessary, since the vacuum inside the tubes prevents heat loss and subsequent freezing.Vacuum tubes are cheap and readily available. Broken tubes can easily be replaced by a semi-skilled person.Hail resistant borosilicate glass tubes can withstand hailstones up to 25mm.Reletively high efficiencies
Vacuum tubes are cheap and readily available. Broken tubes can easily be replaced by a semi-skilled person.
| Connection Type: | Glass |
| Pipe Material: | Glass |