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.

Pre-Installation

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%

Post-Installation

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.