The injustice of “building copper pipes to plunder money” for air conditioning.
Many consumers believe that the air conditioner intentionally lengthened the copper pipes between the outdoor and indoor units to make more money.
“The outdoor part is on the balcony, the indoor part is built behind the living room wall, but the pipeline is more than three meters long, then wraps around the stand, it looks very evil,” said Van Kuen. Quang Yen, Ha Ha) Noi) told him.
Meanwhile, Ngoc Tinh, a mechanic who specializes in installing air conditioners at an electronics mall in Ha Dong, Hanoi, said, “When I was installing air conditioners in Hanoi, I spent all day listening to the owner’s harsh words explain and listen to them.” They say that the outside and inside are only separated by a wall, where they are close to each other, why should they go around with copper pipes like 3-4 meters, in most cases they should be removed, gravure or indeed she is simply asked to pay for a consumption meter.
Mr. Tan Thanh, owner of an electrical appliance shop in District 3 (HCCC), said the problem has been reported for many years, but it is still controversial when it is necessary to install the high maintenance air conditioners in the summer. . In the past few weeks, employees have had to call customers several times about complaints about “money fraud”.
“For a long time, these standards were mostly in manufacturers’ instructions, but few took notice,” he said. “But that is understandable, because not everyone understands the technical requirements and is not careful not to overdo it. This topic is also discussed in some Facebook groups and receives hundreds of conflicting opinions.
According to Mr. Thanh, installation situations where outdoor and indoor units are very close to each other are rare. For families with additional devices at home, it is often necessary to hang the outdoor unit just outside the room. In apartments, in rooms near the balcony, a short pipe length is often required.
According to Mr. Min Tien, an expert in the domestic electrical industry, all air conditioners have special regulations regarding the length of the copper pipes between the outdoor and indoor units. Most are at least 3 meters long, preferably 3 to 7 meters long and should not exceed 15 meters, some special types can be 20 to 30 meters long. Also, the indoor unit should be placed higher than the outdoor unit for better performance.
“If the copper pipe is too short, the refrigerant (gas) cannot return to the compressor in time, it will slowly heat up or cool down, or even cause clogging and serious damage. If the pipe is too long, the cooling process will be extremely slow, reducing the machine’s efficiency and lifespan, he explained. Mr. Tien said these parameters can be found on the company’s official website, electronic mall or other sources.
Many air conditioner manufacturers indicate in the user agreement that for some reason the installation of copper pipes is not guaranteed.
In addition to the length, experts advise caution in using the old copper pipe when upgrading the air conditioner. “When you switch to a larger or smaller capacity model, you should compare the tube level before use. It is better to replace the copper tube if possible to get the best performance,” said P. Tinas advised. Copper tubes for air conditioning have different sizes depending on the capacity and brand. For example, a 9,000 BTU air conditioner typically uses 10 mm OD copper tubing, 12,000 BTU uses 10 or 12 mm, 18,000 BTU uses 12 mm, and 24,000 BTU uses 12 or 16 mm.
Malls and electronics stores often offer chargers, but consumers rarely put money on materials when purchasing air conditioners. The price of copper pipe is calculated from 200,000 to 300,000 VND per meter depending on the size and type. In addition, installers often add other materials, such as: B. Drainpipes, electric wires, insulating cloths… Many places publicly sell the material price and calculate the amount to be paid based on the installation location. , at least three feet away.