The following links are provided for your benefit.  The fact that a link appears here does not indicate endorsement or support by Shelter Companies:

HVI
VenmarVent.com
Aircycler.com
Fantech-us.com
Broan.com
Environmental Protection Agency (EPA)
National Institute for Occupational Safety and Health (NIOSH)
Occupational Safety & Health Administration - US Department of Labor
Department of Environmental Health and Safety, Oklahoma State University
Health Canada - Indoor and Outdoor Air Quality in Office Buildings: A Technical Guide

Regarding IAQ and SBS:
Indoor Air Quality - Sick Building Syndrome

Regarding Indoor Air Quality Issues in Schools:
Health Canada - How to Breathe Easier - How to Deal with Allergies and Asthema

Regarding Indoor Air Quality and Asthema:
National Education Association

Regarding Ventilation Standards:
American Heating, Refrigeration and Air Conditioning Engineers Inc. (ASHRAE)
Air Conditioning and Refrigeration Institute (ARI)
Air Movement and Control Association International Inc.

Regarding ARI Certification:
Air Conditioning and Refrigeration Institute (ARI)