In January 2018, Southern Climate Solutions was contacted regarding ongoing concerns with the presence of excess moisture in a family’s 3- bedroom, 2100 square foot condominium. Visible signs of excess moisture included sweating doors and windows and dripping vents. Also, a slight musty odor presented. During a site visit, it was noted that indoor RH hovered near 65%, a level promoting the growth of fungi, poor indoor air quality, and general discomfort. Various whole home moisture control solutions were discussed. Installation of a system commenced Mid-February, 2018, following a period of data collection of both indoor relative humidity and indoor temperature. Graphed results for pre and post installation data collection as well as the process are discussed below.


On February 14, 2018, at approximately 2:50pm, a data logger was placed in a 3-bedroom, 2100 square foot condominium at Portofino Island Resort to collect pre-installation data measuring both indoor temperature and indoor relative humidity. The air-conditioning temerature was set at 72 degrees F. Data was collected in 5-minute intervals through February 19, 2018, at approximately 3:45pm. Results of pre-installation data is as follows:


  • Average Indoor Temperature (black line): 72.98 degrees F
  • Average Indoor Relative Humidity (blue line): 64.39%


The whole home moisture control system was engaged on February 19, 2018, at approximately 3:50pm. At this time, the air-conditioning was turned off and remained off during the entire data collection period. Post-installation data was collected in five-minute intervals through February 22, 2018, at approximately 1:15pm. Results of post-installation data is as follows:


  • Average Indoor Temperature (black line): 73.98 degrees F
  • Average Indoor Relative Humidity (blue line): 48.05%

System Testing

During post-installation data collection, Southern Climate Solutions entered the home on February 21, 2018, at approximately 3:20pm to observe and test system performance. At that time, sliding glass doors were opened for approximately 10-minutes. The spike in indoor RH can be seen on the graph, followed by a quick recovery of indoor RH to approximately 48%.


Moisture Control System Results Summary

The wall humidistat control set between 45%-50% has yielded excellent results, keeping indoor relative humidity at 48%, on average, eliminating the hazards excess indoor moisture creates, including fungi and poor indoor air quality. Eliminating excess moisture has provided a cooler, drier and healthier indoor environment leading to lesser demands on air-conditioning.  Indoor RH levels between 35%-50% are considered ideal in maintaining a healthy home.