Lower relative humidity with wall mounted IW25 dehumidifier to remove moisture trapped in Senior Housing
For a downloadable PDF version of this case study, click HERE:
Innovative Dehumidifier Systems was contacted by a Senior Housing facility operator in Richmond, VA who was concerned with excessive humidity inside unconditioned stairwells resulting in infiltration and resident complaints. Because this application was in a common area, it required an automatic humidity and mold control solution that limited access to unit controls.
Relative Humidity (RH) measurements taken prior to the installation of the IW25 wall mounted dehumidifiers typically mirrored ambient conditions. Average daily relative humidity in Richmond, VA is 83% RH in the morning and 52 RH% in the afternoon (morning percentages are for 7 am and afternoon measures are for 4 pm local standard time). Source: https://www.currentresults.com/Weather/Virginia/humidity-annual.php
Although primarily designed for installation through an interior wall, flexibility of design allows for the IW25 to be surface mounted using a surface mounting box (optional accessory).
Four wall-mounted IW25 dehumidifiers were installed on CMU walls in two unconditioned stairwells to remove moisture and control excessive humidity. Installation locations were selected adjacent to the first and third floors and units were installed using surface mounting boxes. Prior to the installation, relative humidity (RH) inside the stairwells typically matched ambient conditions which occasionally reached as high as 85% RH. The goal of this installation was to maintain RH below 60% RH in the stairwells at all times for optimal mold control.
On September 9, 2014 Innovative Dehumidifier staff performed a courtesy site visit to inspect installation and record the following temperature and RH measurements:
Ambient (outside conditions) 80.1 degrees 69.7 RH
South Stairwell (first floor) 79.6 degrees 56.0 RH
South Stairwell (third floor) 82.1 degrees 57.9 RH
North Stairwell (first floor) 82.7 degrees 55.9 RH
North Stairwell (first floor) 84.7 degrees 57.4 RH