Why is the minimum air conditioner copper pipe length 3m?

Air conditioning copper pipes are gas pipes made from copper, responsible for circulating gas from the indoor unit to the outdoor unit and vice versa. This copper pipe directly affects the cooling capacity and durability of the machine. Therefore, if you comply with the air conditioner copper pipe length standards, it will help the machine operate more stably and safely.

Why is the minimum air conditioner copper pipe length 3m? Picture 1 Why is the minimum air conditioner copper pipe length 3m? Picture 1

Why is the minimum air conditioner copper pipe length 3m?

If the air conditioning copper pipe is less than 3m long, it will cause the circulation of air conditioner gas to pass through the block faster, and the amount of gas that cannot completely evaporate will flow back to the block. This causes the air conditioner block to work continuously at high intensity, so it is easy to overload, quickly damage and shorten its life.

In addition, the block operates continuously and vibrates strongly, causing the air conditioner to make loud noises, affecting everyone's daily activities.

Suitable air conditioner copper pipe length

The minimum length of copper air conditioner pipes is about 3m, the maximum is about 15m or those with large capacity are 20m.

The average length for the machine to work best is about 3 - 7m. If the copper pipe is too long, it will cause the air conditioner to cool slowly, or not cool at all.

Other standards when installing air conditioner copper pipes

Copper pipes for air conditioners are currently mainly used in two types: smaller sized pipes from the condenser to the condenser (input pipe) and pipes from the condenser to the condenser (outlet pipe).

For a 1 HP machine (~ 9000 BTU): the inlet pipe has an outer diameter of 6mm and the outlet pipe is 10mm.
For a 1.5 HP machine (~ 12000 BTU): the inlet pipe has an outer diameter of 6mm and the outlet pipe is 10mm or 12mm.
For a 2 HP machine (~ 18000 BTU): the inlet pipe has an outer diameter of 6mm and the outlet pipe is 12mm.
For a 2.5 HP machine (~ 24000 BTU): the inlet pipe has an outer diameter of 6mm and the outlet pipe is 16mm.