Easily connect with traditional ducted systems or replace outdated gas furnaces while still enjoying the benefits that ductless systems provide. Additionally, you can install the unit in four different positions for maximum flexibility within any space. The 40MBAB multi-poise air handler has a variable-speed ECM motor that synchronizes with the Carrier single-zone ductless heat pump models 38MARB , 38MBRC sizes, or with select 38MGRB multi-zone models.