1. All-copper liner is the best.
2. Multi-gear adjustment, power 900 W-1600 W.
3. Pay attention to the material of the fuselage, and some use recycled plastic.
4. There are three kinds of water tanks, one is open, the other is closed (if there is scale, it will be blocked), and the third is that the water tank is connected with the fuselage (the scale remover is added in the water tank, so it can't be added, which will corrode the pipeline for a long time).
5。 Many manufacturers use poor materials for vertical poles, which are easy to break. If they shake too much, stainless steel is the best, and it is necessary to pay attention to the convenience of interface connection.
6。 Most manufacturers use rubber tubes as air ducts. Pay attention to the thickness and softness (I don't know how many years it will last). Don't use the outer layer of bread such as wool, which is easy to fluff and dirt. There is also a silicone tube, which is a little hard and has only one layer of material. It will break when folded. These two layers are well insulated and durable.
7。 Cleaning and drainage should be convenient, and water leakage should not be allowed (pay attention to interfaces and conduits).
8。 There are two kinds of bottom plates of the nozzle: plastic and metal. There is little difference between good and bad, but it also depends on the material. Pressurized steamer will have a certain scale.
9. It has the function of preventing dry burning and overheating.
10. It is inconvenient for users of accessories, so we should also pay attention to whether they are well matched.