The 13 - 14 SEER Heat Pump Split Systems available at Budget Air Supply are split up into three categories based on size: 1.5 ton - 2 ton, 2.5 ton - 3 ton, 3.5 ton - 5 ton. Goodman 13 SEER heat humps can ship until there are gone. VSZ13 will be substituted when GSZ13 are gone. They are the same unit; just a different color. Once these products are sold out, the 13 SEER category will be eliminated. Call 855-473-6484 for more information.