Why aircon material the copper pipe thickness not the same with the official recommendation?

For R32 gas, the recommendation is the copper pipe should not be thinner then 0.8mm, so the material should be SWG21 (0.81mm) but many aircon company give...
For R32 gas, the recommendation is the copper pipe should not be thinner then 0.8mm, so the material should be SWG21 (0.81mm) but many aircon company give SWG22... Read More