White Paper Mini-Split Systems in Residential Retrofit Applications Mini-split systems are being marketed for installation in new construction in smaller homes but are also being utilized in retrofits. This paper addresses some benefits and limitations of mini-split systems in residential retrofit applications. Read More Download PDF
Technical Resources Technical Guideline on Through Penetration Firestopping This paper was prepared in response to increasing concerns and lack of understanding of this issue by designers, code officials and contractors. Read More Download PDF