In a Single Stage Electric AC System, efficiency is key, and the [insert product name here] delivers well on that front. The different HVAC units included in this package includes (1) Trane RunTru 5 Ton 14 SEER A4AC4 Series 60000 BTU Single Stage Air Conditioner Condenser A4AC4060A1000A, (2) Trane RunTru A4AH4 Series 5 Ton 14 SEER 60000 BTU Single Stage Multi-Position 3/4 HP Air Handler A4AH4E60A1C30A and (3) Trane 20 kW 65000–70000 BTU Single Phase Electric Heat Kit BAYHTR1523BRK. More Info: https://greenleafair.com/product/trane-runtru-5-ton-14-seer-electric-ac-system/