1, water quantity of water heater
The water quantity of gas water heater changes with the temperature difference between the set temperature and the water temperature. The "liter number" of gas water heater refers to the amount of hot water discharged within 1 minute when the temperature rises by 25℃. Common liters include 13L, 16L, 20L, 24L, etc.
Large-flow water heaters are suitable for families with large population and no heating, while small-flow water heaters are the opposite. If you live in a high-rise building above the fifth floor, you'd better choose a gas water heater with low water pressure.
2. Safety device
The gas water heater should consider whether the safety device is complete. Such as flameout protection, water overpressure protection, anti-dry burning safety protection, anti-freezing protection, etc. It is recommended to choose a way with intelligent anti-freezing function instead of manually draining water through the drain valve.
3. Type of gas used
Every kind of gas appliance has a logo suitable for gas appliance. Be sure to buy the same kind of gas used in your home. At present, there are three main gas sources in China: natural gas, liquefied petroleum gas and artificial gas. Generally speaking, a water heater can only be used for one gas source. When choosing a gas water heater, you should ask professionals clearly and choose a water heater suitable for gas source.
4. Forced balance type
It is recommended to choose forced balance type. This kind of water heater forcibly sucks the air needed for combustion from the outside through the double-layer coaxial flue pipe, and forcibly discharges the exhaust gas to the outside, so there is no possibility that the exhaust gas leaks into the room and does not consume the indoor air. In addition, due to the double-layer flue, when the outside air enters the machine, it is preheated by the hot exhaust gas discharged outside, which plays a role in energy recovery.
Proper use:
1. Is the gas water heater safe or not?
The development of automobiles has brought great benefits to people's production and life. As long as you obey the traffic rules and related safety regulations, driving is safe. Nowadays, although accidents happen every day and many people die in car accidents, automobile production is still developing. Although accidents happen every year in the process of using briquette stoves, people have not stopped using briquette stoves.
Gas water heaters, like many products, should follow certain rules in use. As long as it is installed according to the regulations, operated according to the correct procedures and well ventilated, it will be very safe to use, convenient for life and beneficial to mankind. If you violate this rule, something will definitely happen. ?
2, hypoxia and carbon monoxide harm to people
When the water heater is used, one is to use oxygen to support combustion, and the other is to produce smoke. Under normal circumstances, the content of carbon monoxide in flue gas is very small, but in the case of insufficient air supply, the content of carbon monoxide in flue gas will increase greatly.
When the water heater is used under the condition of poor ventilation, there is less and less oxygen in the air and more and more carbon monoxide. Lack of oxygen makes people suffocate, and carbon monoxide makes people poisoned. Carbon monoxide is a colorless, odorless and non-irritating toxic gas. After poisoning, besides headache, dizziness and nausea, symptoms such as tinnitus, palpitation, vomiting and limb weakness may also occur. The use of water heaters must be well ventilated and must not be sloppy.