Trane’s 4 Ton XV18 Series Split system 48000 BTU 4TWV8048A1000B unit is an 18 SEER outdoor Variable Speed Heat Pump unit that ensures your HVAC needs are met. Due to its 18 SEER rating, the 4 Ton Heat pump unit is very cost efficient when it comes to energy consumption. To ensure healthy, fresh and clean airflow, the 4 Ton Heat Pump unit can be integrated with their premium CleanEffects™ air filtration technology. The premium air filtration system keeps dust, dirt and pollen out from your home. Besides, this 4 Ton Heat Pump unit is equipped with an advanced Climatuff Scroll Compressor. This compressor ensures quiet operation while its Spine Fin Coil increases the efficiency of the 4 Ton Heat Pump unit.