COMPARTMENTALIZED RADON MITIGATION AND IAQ ENHANCEMENT FRESH AIR RETROFIT IN HIGH AND LOW RISE MULTIHOUSING
Wayne Dean, JD
Fort Myers, Florida USA
Until recently, ventilation in multihousing has generally been by exhaust fan operation. The source of replacement (fresh) air was of little apparent concern. As a result, replacement (ventilation) air (often radon-rich) was sourced from building cavities of unknown location and contaminant levels and through unknown and unconsidered pathways. A retrofit fresh air delivery alternative consists of a port bored from indoors through an exterior wall using a special boring rig, an easily removable ventilation/filtration module and a controller sensing indoor temperature and relative humidity to control operation or speed control of the ventilation/filtration module to maintain temperature and humidity comfort regardless of outdoor conditions. Multihousing dwellings are generally compartmentalized so fresh air delivery in such manner can provide a reliable source/quantity of suitable filtered fresh air to mitigate/maintain low radon, CO2 and particulate levels as well as increased oxygen within the unit’s breathing zone.