Blown Insulation for Existing Vented Attic Description Guide describing how to insulate a vented attic in an existing home using blown insulation added to the attic floor.
Existing HVAC System Upgrade or Expansion Description Guide describing how to upgrade or expand an existing HVAC system.
Whole-House Ventilation Strategies for New Homes Description This guide describes how to install a whole-building ventilation system to provide adequate dilution of indoor air contaminants.