2) 3 functions (for piped in water, with UF system, with RO system) are available:
    a. OSWD-L-A/P (16L/D-P) is for piped in water only, can be matched with RO system or other water purifiers;
    b. OSWD-L-A/UF (16L/D-UF) is with 5 grades UF system: Sediment Filter, Pre- Carbon Filter (Granule), Pre- Carbon Filter (Block), UF Filter, Post Carbon Filter (Granule);
    c. OSWD-L-A/RO (16L/D-RO) is with 5 grades UF system: Sediment Filter, Pre- Carbon Filter (Granule), Pre- Carbon Filter (Block), RO membrane, Post Carbon Filter (Granule); RO is with capability of 50GPD, but 75GPD is another option.

3) Refrigerant in compressor is R134a (only for compressor cooling model).

4) Full automatic control system is operated by micro chip controller panel.

5) 3 colours of are shown on LCD screen, during different function.
    a. Orange colour: when heating water, or taking hot water from hot water tap;
    b. Blue colour: when cooling water, or taking cold water from cold water tap;
    c. White colour: when setup the system, or 90 seconds after water be taken out.

6) Temperatures of hot water or cold water can be set, and shown on LCD screen.

7) Avoid Scalding function can be set, to avoid children be injured by hot water, but
    cold water is available all the time.

8) Set time can be operated and shown on LCD screen.

9) All the fittings are quick connector, to make operate more convenience.

10) Double shut down device (water level sensor and mechanical floater) are very
      helpful to avoid the problem of water overflow.

11) Malfunction alarm will be triggered, once over heat or lack of water.

12) Applying solenoid valves for hot water and cold water, which is more convenient and easy operation.

13) 2 modes of cooling water are compressor cooling and electrical cooling.

14) 3 water tanks are room temperature water tanks (5 Litres), heating water tanks (1.7 litres) and cooling water tanks (1.7 litres).