Optimum level of refrigerant gas is require for the aircon to run efficiently.
Low refrigerant gas level will lead to more energy wastage and even not cooling at all
Older equipement before 2015 are generally charged with R22 gas while newer model are charged with more energy efficient and enviromental frienly refrigerant R410A.
Our price quoted are for per outdoor (condenser) unit for residential aircon. Other industrial aircon may need site accessment to quote.