This installation is not recommended.
There are advantages and disadvantages to installing a separate (flat) solar water heater indoor water storage tank in the bathroom:
Disadvantages:< /p>
Because the distance between the collector and the water tank is relatively long, so during the heating process (heat exchange), the working fluid (antifreeze) has to travel a long distance (the rooms Most people's bathrooms are on the shady side and the collectors are usually installed on the south balcony), which will cause excessive heat loss, causing the hot water in the water tank to slowly heat up and the final temperature will be lower than that of a water heater installed on the balcony.
Advantages:
Compared with the method of installing the water tank on the balcony, this method has an advantage: the distance between the water tank and the terminal of water (bathing water) isrelatively short. Hot water comes out faster.
Considering energy saving factors (electric heating should be used to compensate for lukewarm water), it is not recommended to install it in the bathroom.