Central heating system

Central heating system

1. one pipe semi-gravity system layout

   • advantages
     • quicker to install
     • low installation cost
     • disadvantages
       • the heat emitter pass cooler water to the circuit
       • unequal heating
       • the pump forces the water through the main circuit
     • lower maintenance cost

2. two pipe semi-gravity system

   • this system have two independent flow and return heating circuit
     • disadvantages
       • advangaes
         • evenly distribute heat
         • quick heating time
       • take longer to install
       • take more space
       • cost more to install

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