| BSP-W/BSP Models |
SPU-2/SPU-2-W Model | SED 750/250 Model | SEM-1 Model |
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| Storage tanks with water surfaces layered property |
SPU-2:Buffering tank without coil SPU-2-W:Buffering tank withcoil |
Dual tanks, suitable for heating and hot water Consumption, with only one tank | Consumption single-coil hot water tank |