| 摘要 |
A dual fuel heating source (10) can have a dual entry valve unit (3) with a main body at least partially defining a certain flow paths or channels therethrough. The dual entry valve can have first and second inlets and first and second outlets. The dual fuel heating source may also include a pressure regulator (12), an exit valve (5), a control valve (59) and/or a manifold connected to the dual entrv valve unit. |
