For your residential and commercial spaces, this Trane 4 Ton 20 SEER (20.5 SEER) Variable Speed Electric Communicating System has been put together to offer the most efficient heating and cooling to your home. This package includes – (1) Trane 4 Ton 20 SEER XV20i 48000 BTU Variable Speed Air Conditioner Condenser 4TTV0048A1000C, (2) Trane 4 Ton 2-Stage Variable Speed Convertible & Multi 3/4 HP Air Handler TEM8A0C48V41DB and (3) Trane 15 kW (10.8–14.4 kW) Electric Heater BAYHTR1517BRKA with Breaker.