Ductless Mini-Split Installation in Philadelphia

Philadelphia rowhouses often have plaster walls, narrow floor plans and limited room for ductwork, which makes ductless mini-splits a common way to add cooling. Outdoor units typically go on the roof or in a small rear yard.

Installers must handle roof penetrations carefully on rowhouses to avoid leaks, and permits are required through the city's Department of Licenses and Inspections. Multi-zone systems can cover each floor of a rowhouse with one outdoor unit.

Ask how the installer will run line sets between floors in a rowhouse, through closets, along exterior walls or inside chases, and how penetrations will be sealed.