Air handlers are an efficient way to get conditioned air around your home, so the Trane RunTru A4AH4 Series 3 Ton 14 SEER 36000 BTU Single Stage Multi-Position 1/2 HP Air Handler A4AH4P36A1B30A is a great choice for 3-ton capacity systems. More Info: https://greenleafair.com/product/trane-runtru-3-ton-14-seer-36000-btu-single-stage-multi-position-1-2-hp-air-handler-a4ah4p36a1b30a/