Mini-split systems are being marketed for installation in new construction in smaller homes but are also being utilized in retrofits. Ductless mini-splits are gaining popularity due to their higher seasonal energy efficiency ratio (SEER) ratings and ease of installation. There are definite benefits to mini-splits, but there are some variables that cannot achieve the same level of performance of a traditional ducted split system.
This paper addresses some benefits and limitations of mini-split systems in residential retrofit applications.
Mini-Split Systems in Residential Retrofit Applications Paper