Modular Classroom Buildings and Air Quality
What is Indoor Air Quality?
Indoor air quality (IAQ) refers to the quality of the air inside buildings as represented by concentrations of pollutants and thermal (temperature and relative humidity) conditions that affect the health, comfort and performance of occupants. Other factors affecting occupants, such as light and noise, are important indoor environmental quality considerations. 
Is the quality the same?
Modular buildings are built to the same International Building Code (IBC) requirements, and using the same materials, as site built structures. Each IMS classroom has an exterior mounted heating and cooling unit with an integral Commercial Room Ventilator (CRV). The CRV is an outside air intake designed to bring at least 15 cubic feet per minute (cfm) of outside air into the classroom per student.
Maintenance is important
Regular maintenance is a key factor in maintaining a quality indoor environment along with replacing air filters on a regular basis. Air filters in your mobile building’s air-conditioning unit and ventilator must be carefully monitored. It is recommended replacing air filters once a quarter, or more frequently depending on the site conditions. Modular companies can supply an Outdoor Air Kit to allow fresh air to be introduced into the classroom while a filter in the return will help remove pollutants from the classrooms. Air intakes and return outlets should be located away from each other to ensure the air circulating throughout the classroom remains fresh and clean.
Each IMS classroom is equipped with a thermostat that has a “FAN ON” function which allows the fan in the HVAC unit to continuously bring outside air into the classroom if desired; however, IMS recommends running our fans in AUTO, otherwise, you could have issues bringing in too much outside air during extreme humid or cold outdoor temperatures.
Modular classrooms are typically equipped with a CO2 sensor to provide on-demand ventilation, thus ensuring the classroom gets fresh outside air when needed, while maximizing energy efficiency.
What else can be done to improve the air quality in Modular Buildings?
IMS does not use particleboard, hardwood plywood paneling, or exposed medium density fiberboard in its modular classroom buildings, which the EPA has deemed as significant sources of formaldehyde in homes. The standard types of carpeting provided in IMS buildings are purchased from manufacturers that participate in the Carpet and Rug Institute Indoor Air Quality Program and contain no formaldehyde and each IMS building has at least two operable windows to allow the user-controlled ventilation when desired.
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