| 摘要 |
<p>The main heating system has a fuel cell heater (1) that heats water that is pumped (22) to a circuit having a pair of storage tanks (2,5) in parallel. A three way valve (18) also allows flow to be fed to a consumer unit (9). This has a bypass line (8) that connects with a three way valve (7) to control the flow between the feed and return lines to maintain a controlled return temperature.</p> |
