Misunderstanding of water heater purchase 1. isothermal
In fact, the current gas water heaters are all constant temperature, and there is almost no non-constant temperature. Even a forced-discharge gas water heater of several hundred yuan is also called "forced-discharge", but it also has a thermostat. The thermostat inside is a water-gas linkage valve, and the temperature change range is +/-3℃. Compared with the constant temperature gas water heater, the constant temperature effect will be inferior, and the constant temperature change range can reach +- 1℃.
Misunderstanding of water heater purchase II. True copper is oxygen-free copper.
This is also wrong. The real copper water tank only shows that the main component is red copper, that is, pure copper, but it has not been deoxidized, so the oxidation resistance is worse than that of oxygen-free copper. The real copper water tank, when we open the shell of the gas water heater, is generally silver. In fact, the surface is treated with tin dipping, which is a welding process of real copper water tank, and oxygen-free copper water tank is the true color of copper.
Misunderstanding 3 of water heater purchase. Anti-downward flow treatment
At present, almost all gas water heaters have been treated for backflow prevention. Some are designed at the joint between the flue pipe and the water heater, and some are designed inside the gas water heater. In fact, the principle is the same, that is, when smoking, open a movable flap to make the flue unobstructed. However, when the external wind is too strong, in order to prevent the flue gas from flowing backwards, the flap will be closed under the action of the wind. At the same time, the wind pressure switch of the gas water heater detects that the exhaust of the hood is blocked and will automatically transmit data.
Misunderstanding 4 of choosing water heater. 35-65℃ wide range temperature adjustment
In fact, they are all within this range now, and some are even wider than this range, but it is not necessary. After all, the temperature suitable for our body bathing is around 38-40℃, and this range is enough.
Misunderstanding of water heater purchase 5. Adapt to the ultra-low water pressure of 0.02MPa.
In fact, most gas water heaters can adapt to this water pressure, which is equivalent to the water pressure of the water tank 2 meters higher than the installation height of gas water heaters. However, if this water pressure is really reached, I think that although we can take a bath, it can't completely satisfy the comfort of taking a bath. Generally, it must reach at least 0.05MPa to reach a comfortable level.