The blue filters don't restrict your air flow.Like a pleated filter will.You can get those filters from whatever your local supply house is located.Yes I can maintain any type or model of unit.General maintanence would cover washing your condencer coil which is the number one reason for a/c related service calls.Dirt and dust gets caught in the fins restricting the air flow which make your equipment run more often and harder .Also check pressures make sure your refridgerant levels are were they need to be also check your evaporator coil and make sure there is no dirt ir mold build up put some anti mold tablets in your unit.If you change your filters monthly it should still be clean.If you are interested in getting your airconditioner serviced please pm me
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