I have a 10 year old Goodman that has R22. I was told by my service man that R22 will be gone soon and he said that he could change out the airhandler and put 410 in. Through surfing thte internet I have found that R22 is plentiful. My question is can my existing unit be changed to 410 and if so does the 410 cool better, same, or worse
Then the R22?