Advantages: rapid temperature rise, stable temperature and more economical.
The gas should be protected from cold water for a while, and the electric water heater will have heat residue; Generally speaking, it should be a bit cost-effective for gas.
The advantage of burning gas is that there is hot water as soon as it is turned on, but the disadvantage is the emission of waste gas. If we can put the air inlet and the air outlet outside. That gas should be the best.
Electric water heaters can't produce hot water immediately. It takes 30-60 minutes to use after the power is connected. There is also the problem of electric leakage.
Now there is an electric water heater, which can provide hot water immediately, but the power is several thousand W, which ordinary household wires can't bear.
Electricity is safe and gas is convenient.
The exhaust types of gas water heaters are: direct exhaust type, flue type, forced exhaust type and balanced type. Direct-discharge oxygen is taken indoors, and waste gas is also placed indoors, which belongs to eliminated products; Flue type uses flue to discharge waste gas to the outside, which is widely used; Forced discharge motor is the development direction of water heater in the future; Balanced type does not consume or pollute indoor air, but the installation of this water heater needs to reserve channels like air conditioners, which is more expensive.
Safety: ★★★ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ Safety.
Convenience: ★★★★★☆ Gas water heater is more convenient, as long as there is gas, it can be used anytime and anywhere.
Energy-saving degree: ★☆☆☆☆☆ At present, the gas price in Shanghai is relatively high compared with the electricity price after adopting time-sharing meters, and it is even less competitive than the completely energy-saving solar energy.
Affordability: ★★★★★☆☆☆ The price of gas water heater is still affordable in water heater. Take a domestic brand product as an example, the price of 10L is 1 109 yuan, and the price of 13L is 1340 yuan. Products of imported brands are at least several hundred yuan more expensive.
suggestion
● For a family of three, it is more appropriate to choose a gas water heater with the specification of 10- 13L.
● The water heater with constant temperature control is three or four hundred yuan more expensive than the general water heater, but it can avoid the cold caused by cold and hot water temperature, which is more cost-effective than spending 1,000 yuan on a constant temperature faucet.
● Gas water heaters are more suitable for families with small living areas. If the kitchen and bathroom at home are far away, you can consider installing an electric water heater in the bathroom and a gas water heater in the kitchen.
In fact, the varieties of electric water heaters are becoming more and more diverse. In terms of volume, the small ones are only 30L and 40L, and the large ones are 150L. For a family of three, it is more economical to choose the size of 80L. If the economic conditions permit, double the cost of 150L can meet the daily water demand.
When many electric water heaters are installed, the wire-controlled switch can be completely hidden or semi-hidden, which is more beautiful, but consumers should pay more attention to the safety of cable arrangement.
Safety: ★★★☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆97 If it is the first time to use the electric water heater, be sure to fill it with water before turning it on.
Convenience: ★★★ ☆ ☆ ☆ ☆ ☆ ☆ Convenience
Energy saving: ★★ ☆ ☆ ☆ ☆ ☆ ☆ Energy saving.
Affordability: ★★★ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆
suggestion
For a family of three, it is advisable to choose 80L electric water heater. If economic conditions permit, you can choose a large electric water heater.
● When using the water heater, shower instead of bath can save 50% of water and electricity. In addition, the shower temperature should be set reasonably, generally between 60-80℃, and the starting and ending time can be determined according to actual needs.
● When using the electric water heater, try to avoid the peak power consumption and turn down the thermostat in summer.
● If you need to use hot water at home at any time every day, and the heat preservation effect of the water heater is good, then you should always keep the water heater energized and set it in the heat preservation state, because the electricity used for heat preservation for one day is less than that used for heating a box of cold water to the same temperature. This not only facilitates the use of hot water, but also achieves the purpose of saving electricity.
When it comes to safety and energy saving, gas water heaters and electric water heaters are not the "rivals" of solar water heaters. Although it is expensive, you don't need to pay electricity and gas bills. As long as there is sunshine, you can use hot water at any time. Many merchants suggest that consumers add an electric heating rod to the solar water heater, which can be used as an electric water heater in the case of insufficient light.
Safety: ★★★★★☆ Not afraid of gas poisoning and electric leakage, it is safe to use solar water heaters. But the influence of lightning weather should also be considered. The solar water heater should be installed at a certain position under the lightning protection belt (needle) of the building or install a lightning rod to avoid potential safety hazards.
Convenience: ★★★ ☆ ☆ ☆ ☆ ☆ ☆ Convenience
Energy-saving: solar water heaters do not have to pay electricity and gas bills, and use natural solar energy, which is the most energy-saving water heater product at present.
Affordability: ★★★★☆☆☆ Solar water heaters have the largest one-time investment. There are more than 3,000 cheaper ones on the market, and 6,000 or 7,000 larger ones with full functions. But it's quite cost-effective to think about not spending a penny on it in the future.
suggestion
● When taking a shower, if the water in the solar water heater happens to be used up, the user can put some cold water, and push the hot water out of the vacuum tube by using the principle that the cold water sinks and the hot water floats, and then take a shower. If there is still a little hot water in the solar water heater after bathing, the hot water can be washed by one person after a few minutes of cold water, and the hot water output of each vacuum tube is 6-8 liters.
According to the weather forecast, the water quantity can be determined and the satisfactory water temperature can be obtained. If it is sunny tomorrow, you can irrigate it; Cloudy or cloudy, half a box of water; If it rains, keep the original water instead of cold water.
● Don't think that choosing a small solar water heater is like a 25 color TV, smaller than 29, just watch. In fact, there are essential differences between big solar energy and small solar energy. The big one allows you to use hot water all the time. Everyone uses hot water and everything uses hot water, which is more cost-effective in the long run.
In recent years, electric water heaters have developed rapidly and become a strong competitor of gas water heaters. Many consumers will have such questions before buying water heaters: Is it better to buy gas water heaters or electric water heaters?
Bibi hot water production
Gas water heaters are mainly available in 5 liters, 7 liters, 8 liters, 10 liters and other specifications. This figure refers to the amount of hot water generated when the water temperature rises by 25℃ within 1 minute. Electric water heaters are generally marked with more than 30 ~ 90 liters, which refers to the water capacity of electric water heaters. Comparing an 8-liter gas-fired water heater with a 60-liter electric water heater, the 8-liter gas-fired water heater can continuously generate 8 liters of hot water per minute, and there is no limit to the water consumption. The electric water heater needs to heat a pot of water every half hour. If this pot of water is used up, it will take about half an hour. In winter, if you don't have a good grasp of the bath time and haven't washed a can of water, you have to wait for half an hour to continue washing.
Stability of Bibi hot water temperature
Because the gas water heater is fast heating and has a temperature regulating device, as long as it is adjusted to a comfortable temperature at the initial stage of use, the hot water will always maintain this temperature. Electric water heaters are volumetric. After a can of water is heated, because the temperature is high (generally around 80℃), it is necessary to push out the heated water with cold water when it is first used, and at the same time, it is necessary to change some cold water. In the process of ejection, the water temperature is high at first, and it will gradually decrease with use, so it is necessary to constantly adjust the ratio of cold water to hot water when using.
Bibi thermoelectric
The power of gas water heater is much larger than that of electric water heater. Comparing the 8-liter gas water heater with the 60-liter electric water heater, the 60-liter electric water heater generally does not exceed 3 kW, while the power of the 8-liter gas water heater is 16 ~ 17 kW, which is equivalent to 5 ~ 6 times that of the electric water heater. Can the electric water heater be 16 kW? No, summer is the use period of air conditioners, and electricity consumption is tight. If 16 kW electric water heater is used again, the electric meter and wires will be overwhelmed.
Bibi price
The price of 8-liter gas water heater is generally above 800 yuan, and the installation cost is generally above 1000 yuan, and some even close to 2000 yuan; The price of electric water heater is above 1000 yuan, and the installation cost is generally within 1500 yuan, which is cheaper than gas water heater.
From the point of operating cost, at present, natural gas is per cubic meter 1.6 yuan, and electricity per kilowatt-hour is 0.4 yuan. Because both of them are used to heat water, compared with heat, the heat of 1 m3 natural gas is 10 kW, the heat of 1 kW hour electricity is 1 kW, the cost of using natural gas per kW is 0. 16 yuan, and the electricity consumption per kW is 0.40 yuan. So the cost of electric water heater is 2.5 times that of gas water heater.
Bibi life span
If the gas quality of the gas water heater is good, it can generally be used for more than 6 years; The electric water heater can be used for about 4 years under the condition of good water quality because of the serious scaling phenomenon. With the extension of service time, the heating efficiency of electric water heater will be greatly reduced.
Bibi security
Because the gas water heater will emit a lot of waste gas when it is used, there are carbon monoxide in the waste gas besides carbon dioxide. Under the condition of normal use and good ventilation, carbon monoxide is rare, but if the doors and windows are closed during use, carbon monoxide will increase due to poor ventilation, and serious poisoning accidents will occur. Gas water heaters are very safe if you pay more attention to them when using them.
When using the electric water heater, no waste gas will be produced. From this point of view, it is safe and hygienic, but we should also pay attention to the leakage of electric water heaters. Although electric water heaters are equipped with leakage protection, electric shock accidents caused by using electric water heaters also occur from time to time.
From this point of view, gas water heaters and electric water heaters have their own advantages. No matter what kind of water heater consumers buy, they should know the relevant common sense of use, which can not only protect the safety of themselves and their families, but also prolong the service life of water heaters.