I suggest you adopt the second option. The electric water heater is installed in the second bathroom to power two bathrooms. If you consider that using hot water in the master bathroom is a bit wasteful, you can choose to do it directly. connect a separate water pipe under the water heater in the secondary bathroom. For the sink location in the master bathroom, this method of water pipe installation called spot circulation will slightly reduce waste in future use. Of course, it is impossible to waste it. at all! The gas water heater only supplies the kitchen and the back balcony, and it is too far away to get hot water. You can then find out about the water heater and see if it is necessary to install one under the secondary electric water heater depending on your own situation. Generally speaking, domestic installations do notdo not use 3-point water lines, and at least 4-point water lines must be used. In fact, more water is used than 3-point pipes! If you have any further questions, please don't hesitate to ask.
After the master bathroom has a shower, the hot water in the guest bathroom and kitchen will not be hot or the temperature is not enough the next day. For what ?
If you're in the south, I suggest using both electric; if you are in the north I suggest using one gas and one electric. Hot water is often used in the kitchen, especially for washing greasy objects or washing dishes. If I may suggest you to use something larger than 8 liters, you will feel very uncomfortable if it is less than 6 liters because the water flow is very low. Another special reminder is that it is recommended to take insulation measures for water pipeswarm. Nowadays, there is less risk of power outages. If you burn gas, it will cost more. However, when using electricity, it is recommended to use a good brand, such as Smith and others with high quality, to quickly avoid leakage and heat.
What type of water heater is this? Electricity or solar energy?
If it is an electric water heater, it may not have enough power. It may also be due to the poor quality of the thermal insulation coating of the water heater, which has poor thermal insulation performance.
If it is a solar water heater, it must also be considered that the insulation function is defective.