TXV versus VRF air source heat pumps

Folks.  I need to understand the fundamental difference between these two heat pump technologies.  I am familiar with the basics of VRF, not so much TXV.  Short time line related… Folks.  I need to understand the fundamental difference between these two heat pump technologies.  I am familiar with the basics of VRF, not so much TXV.  Short time line related…Read MoreGreenBuildingAdvisor