]> 2026-05-27T02:30:14+02:00 Copy of Zigzag solar water heater 0 en [[File:Oseg zswh original1.jpg|thumb]] [[File:TRL2-60.png|left|link=About TRL|90px]] Blueprints and instructions for the construction of a solar water heater, based on manual published by WOT. It may be helpful in constructing solar collectors and building hot water systems especially for communities using large quantities of hot water. This project is published under the terms of the CERN-OHL licence. zigzag, solar energy, heater, water, sustainable, boiling, communities OHO e.V. Zigzag solar water heater 2023-11-03T07:05:58Z 2460251.7958102 2023-11-03T07:05:58Z 2460251.7958102 Copy of Zigzag solar water heater