It Is very problematic to attach wood burning stoves or other uncontrolled heat sources to an unvented cylinder, and difficult to mix option Electrical power heat sources to provide Vitality on the heating circuit, hence the exclusive advantages of a thermal store. Heat exchangers, Specifically flat-plate warmth exchangers, have the https://www.gledhill.net/products/thermal-storage/boilermate-ov-pre-plumbed/