With economic development, people's demands for quality of life are increasing. Their requirements for showering and bathing are also rising, and gas water heaters, electric water heaters, and solar water heaters are far from meeting people's needs for comfort, energy efficiency, and safety. In developed countries in Europe and America, the ratio of cold to hot water usage is 1:9 (compared to 9:1 in China). In Europe and America, cold water is only used for drinking, flushing toilets, and washing cars, while hot water is used for everything else. The market share of central water heaters in European and American households is over 90% (less than 3% in China).
First Generation: High-Power Gas Water Heaters:
1. Outlet water temperature and pressure are greatly affected by climate conditions, unstable, and difficult to adjust.
2. High energy consumption and emission of large amounts of toxic waste gas; short service life.
Second Generation: High-Power Electric Water Heaters:
1. Primarily, extremely high energy consumption, prone to electric shock, and insufficient water storage capacity.
2. Excessively high water temperature leads to severe scale buildup in the inner tank and a short service life.
Third-generation solar water heaters:
1. Theoretically the most energy-efficient, but considering practical realities such as frequent rain, cloudy days, and winters in northern regions requiring external electric assistance, they are essentially equivalent to electric water heaters, posing a significant safety hazard.
2. Because solar water heaters are generally open systems, the water pressure is entirely determined by elevation differences, resulting in poor comfort.
3. The vacuum tubes used in solar water heaters are easily broken, making repairs difficult and reducing their lifespan.
Fourth-generation: Air source heat pumps
1. No installation restrictions.
2. Safe to use; since no electrical components are in direct contact with the water, there is no risk of electric shock.
3. Energy-saving; its power consumption is only 1/4 of ordinary electric water heaters, 1/3 of gas water heaters, and 1/2 of solar water heaters.