High-Quality Budget-Friendly Ventilation System

zone 4a. Pretty good 2 bedroom, 900 sq ft. house, ductless mini split. I am looking for a budget friendly ventilation solution, that is cheap to maintain, and either has,… zone 4a. Pretty good 2 bedroom, 900 sq ft. house, ductless mini split. I am looking for a budget friendly ventilation solution, that is cheap to maintain, and either has,…Read MoreGreenBuildingAdvisor