4 Ton Ductless Mini split air conditioners feature a 48000 BTU Total Capacity which can cool or heat a total of 2000 square feet.  48,000 BTU systems split there capacity between atleast two zones.  For example, a dual zone 24000 BTU x 2 system which will cover 2 seperate 1000 sq.ft. areas or a quad zone 12000 BTU x 4 setup.  All the below 4 ton ductless systems come pre-charged with either R410 or R22; all include digital remotes and installation kits but they differ in features, zones and price.