Non-pressurized solar water heaters, also known as low-pressure solar heaters, are solar heaters whose tanks have low-pressure water. The pressure of the water is equal to gravity. The hot and cold water separate in the tank using the hot water rises principle. These heaters do not use pumps to circulate or transfer heat within the tank.
As people become environmentally conscious, the need for solar water heaters rises. Solar water heaters are cheaper than electric water heaters. Solar water heaters in the market are either pressurized or non-pressurized.
- Capacity
The hot water needs will determine the capacity of the water heater one should get. The users of hot water will dictate the size of the water tank required and the solar water heater that will be compatible. The higher the number of users, the larger the water tank capacity and hence the larger the solar heater required, and vice versa.
- Installation and Maintenance
One should buy a non pressurized solar water heater from a reputable firm. Also, one should get certified professionals to install the non-pressurized solar water heaters. This will ensure the solar water heater works as it should and will last long with minimal risk of failure or damage.
A bonus would be to buy from a company that offers after-sales maintenance and service and responds fast in cases of malfunctions or damage.
- Type and Functionality of the Solar Collectors
One may get the flat plate collector (FPC) or evacuated tube collector(ETC). The FPC has high conductivity and emissivity, which makes them poor heat retainers during lower temperatures. The ETC has a higher heat retention capacity but is more delicate as they are made of glass. They must be handled with extra care during installation, service, and operation.
The climatic conditions of the area where the water heater will be installed will dictate which is better, the FPC or the ETC.
- The Source and Pressure of the Water
Tanks for non-pressurized solar water heaters need to be placed on a high surface, such as the roof of the house, as the water flows with gravity. This will ensure the hot water flows into the house with enough pressure and reaches all the needed places.
- Reputable Provider
It is important to buy a solar water heater from a known company. This will ensure one gets genuine and original products. It will also make it easier to find reviews of customers who have installed the solar heater to understand what one should expect.
Conclusion
After deciding to buy a non-pressurized water heater, the next important step should be determining the factors determining the heater one buys. Factors such as the solar water heater manufacturer, the number of users, and the functionality of the solar collectors will dictate the solar heater to get.
Rushing into buying a non-pressurized solar water heater is not a good idea. One should do due diligence to ensure they will get value for their money and an appliance that will serve them well and for a long time.
