gas oven
Gas water heaters are the earliest used water heaters, which can be divided into natural gas, liquefied gas and pipeline gas. When gas burns hot water, it will produce waste gas (carbon dioxide, carbon monoxide, sulfide gas, etc.). ), it is easy to cause harmful gas accumulation and lack of oxygen, thus causing personal poisoning, ranging from health hazards to casualties. Therefore, the early in-line water heaters have been banned from production and sales, and the reporter does not recommend consumers to use flue water heaters because their safety performance is unreliable.
At present, forced row water heaters and balanced forced row water heaters are popular in the market. Equipped with motor and exhaust fan, the exhaust gas can be effectively discharged to the outside, and the outlet pressure of the balanced forced exhaust water heater is more stable, so it will feel more comfortable when taking a bath. Compared with other water heaters, gas water heaters are the cheapest to buy. Ordinary families use 8 liters. The price of foreign brands such as Linnei is about10.5 million yuan, while the price of domestic brands such as Wan Jiale, Chuangerte and Wanhe is about10.5 million yuan.
Some places are currently reforming natural gas, so when buying gas water heaters, you should ask whether the manufacturer is responsible for replacing the pressure valve free of charge, otherwise it will cost a sum of money after changing natural gas. It should be reminded that consumers should pay attention to matching their own gas sources when buying gas water heaters: domestic pipeline natural gas should buy models marked with "T", liquefied petroleum gas should buy water heaters marked with "Y" and artificial gas should buy water heaters marked with "R".
Advantages: fast hot water output, constant water temperature and low purchase price.
Suggestion: Domestic gas supply is better, and users with small bathrooms or kitchens can choose gas water heaters.
electric water heater
Electric water heaters are divided into storage water heaters and fast electric water heaters. An electric water heater is an appliance that heats water with an electric heating tube. Its principle is the same as boiling water with an electric kettle.
water storage type electric water heater
The water storage electric water heater is much more complicated than the electric kettle, mainly by adding many practical and safe designs. For example, many brands of electric water heaters have high, medium and low water temperatures to choose from, and are equipped with water and electricity isolation, anti-dry burning and anti-leakage devices. Some electric water heaters have ultra-high temperature protection and low temperature reminder functions. Other applications of electric water heaters include microelectronics technology, which can display the water temperature and water quantity in real time on the LCD screen, give voice prompts for the operation and use procedures of electric water heaters, and give audible and visual prompts and give an alarm in case of abnormal conditions.
But the storage electric water heater needs to heat a can of water every half hour. When taking a bath in winter, if you don't master the bath time well and haven't finished washing a can of water, you have to wait in the bathroom for about half an hour. Moreover, because the water storage electric water heater is volumetric, after heating a can of water, it is necessary to push the heated water out with cold water and exchange some cold water when using it because of its high temperature (generally around 70℃). During use, the water temperature in the cylinder gradually drops until it is all cold water, so it is necessary to constantly adjust the ratio of cold water to hot water when using.
The key of storage water heater lies in the inner container. At present, there are several kinds of water heater liners on the market, such as galvanized steel liner, stainless steel liner, enamel liner and Jingui liner. Experts unanimously recommend Jingui liner, because it is particularly anti-corrosion and anti-fouling, and the service life of water heaters is mostly over 30 years.
Fast electric water heater
Fast electric water heater combines the advantages of gas water heater and storage water heater, with clean energy, fast hot water output, small volume and convenient installation. However, the minimum power is 4.5 kilowatts, generally around 8 kilowatts to 9 kilowatts, which consumes a lot of electricity.
The most depressing thing is that the fast electric water heater requires a high capacity of household power supply, and basically needs a copper-core dedicated line with 4~ 10 square millimeter conductor. At present, Autran and Blue Medal are popular in the market.
Compared with gas water heaters, it is more economical to use electric water heaters. The reporter suggested that it is enough for a family of three to choose a 60-liter water storage electric water heater. A. O. Smith, Siemens and Vidis are reliable in quality.
Advantages: clean energy and economical use.
Suggestion: Families with good electricity supply, large bathrooms or kitchens and basic knowledge of electricity use should buy and use electric water heaters.