4 years now and no gas added, as long no leaks, not necessary
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The refrigerant gas in the air conditioning system is not consumed or used up with normal use. The refrigerant simply circulates through the system, without fading or depleting. Unless there is a leak in the system, there is no need to recharge the refrigerant gasA common belief is that refrigerant gas runs out over time and therefore needs to be recharged. However, this is incorrect. The refrigerant gas in the air conditioning system is not consumed or used up with normal use. The refrigerant simply circulates through the system, without fading or depleting. Unless there is a leak in the system, there is no need to recharge the refrigerant gas.
https://www.climamarket.eu/blog/en/is-it-necessary-to-recharge-the-air-conditioning-in-your-home/#:~:text=The refrigerant gas in the,to recharge the refrigerant gas.