Minnesota Children's Museum Expansion and Renovation
Minnesota Department of Employment and Economic Development
10 West Seventh Street St. Paul, MN 55102
Indoor Environmental Quality (IEQ)

Minnesota Children's Museum Renovation and Addition Project's goal is to maintain a safe and inviting space for all. To achieve this goal, we are implementing several Indoor Environmental Quality Strategies. 1. Acoustic treatment: The Atrium is an existing space but there will be several architectural and exhibit modifications. The current space has gypsum board ceiling, walls, and carpet. We have taken several opportunities to improve the quality of the space with acoustic ceiling treatment underneath the main stair, acoustic wall panels within the main climbing zone, and acoustic ceilings. These interventions should help to mitigate noise in the Atrium and adjacent areas. Multipurpose and Classrooms will need to be acoustically controlled for speech intelligibility. Acoustical treatment on the ceilings will help to meet B3 recommended reverberation rates. Administration area will meet a reverberation time of .2-.8 seconds at 500 Hz. To achieve this rate, all of the ceilings will have absorptive materials. Mechanical rooms will also have acoustically rated walls and equipment will be on vibration isolators as appropriate for the weight of the unit and location. 2. Prominent stair: The newly renovated Minnesota Children's Museum will have a decorative central stair. This stair will be the main circulation path for visitors. 3. Occupant daylighting will be controlled as required for Museum programming and automatically adjusted with daylight sensors throughout the building.


4.74 IEQ Satisfaction Score for Offices
This score indicates the users’ mean satisfaction with the indoor environmental quality in the building’s primary spaces. It is expressed on a Likert-type scale from 1 (very dissatisfied) to 7 (very satisfied). The score is derived from the results of the Sustainable Post-Occupancy Evaluation Survey (SPOES) by averaging the score from each of the IEQ categories in order to fairly represent overall satisfaction with the physical environment.
IEQ Categories for Offices
The table below shows the mean satisfaction score for each IEQ category.
#CategoriesMean Satisfaction
1Cleaning and Maintenance5.62
2Indoor Air Quality5.59
3Vibration and Movement5.43
6Daylighting Conditions5.05
8Thermal Conditions4.27
10View Conditions3.95
11Acoustic Conditions3.89
Overall Facility Ratings by Employees
This graph shows the users’ ratings (as means and standard deviations) of the overall facility, including the site, building, and interior. The values indicate user satisfaction, perception of their performance, and perception of their health in relation to the facility. They are expressed on a Likert-type scale from 1 (facility hinders satisfaction/performance/health) to 7 (facility enhances satisfaction/performance/health).
Very Satisfied
Very Dissatisfied
Primary Occupied Spaces
Space% Total Person Hours% Area
The building consists of education and exhibition space, administrative office spaces, conference space and support areas. The indoor environmental quality of the administrative workspaces was evaluated through an employee survey. The high-level results of this survey are shown here.
The Sustainable Post-Occupancy Evaluation Survey (SPOES) is a self-administered, Internet-based questionnaire developed to assess human outcomes in indoor settings. The survey was completed by the user group of the primary space and analyzed by the B3 Post-Occupancy Evaluation team. The SPOES reports document user satisfaction with the physical environment as related to various indoor environment quality criteria, such as lighting, thermal, and acoustic conditions.

See the B3 Post-Occupancy Evaluation website for more information.
Workplace (June 2018)
IEQ Strategies
  • Continuous Daylighting Controls
  • Provide Daylighting Through Atria
  • Provide Daylighting Through Side Windows
Occupant Control
  • Occupant Daylighting / Glare Control
  • Occupant Electric Lighting Control
  • Ventilation Compliant with ASHRAE 62
Certified Materials
  • CRI Green Label Plus Certification Adhesives
  • CRI Green Label Plus Certification Carpet
  • GREENGUARD Certified Product

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