EHSI/Healthy Buildings, Inc. has inspected more than 4000 homes, businesses and schools over the past 19 years.
We have helped more than 98% of our clients identify indoor air quality problems and provided them with the necessary tools to create home and office environments in which the occupants are comfortable and healthy.
EHSI/Healthy Buildings, Inc. looks at the relationships between the building structure, occupants, furnishings, mechanical systems and operations to understand indoor environments as a whole.
We provide written comprehensive reports with solutions and mitigation measures to improve the buildings indoor air quality.
Noteworthy Projects
- Seattle School District, Building Excellence Program, Indoor Air Quality Consultant for the SSD Building Excellence Program. Consulting on creating a healthier indoor environment in 19 new and remodeled schools.
- Bill Gates House on Lake Washington – Nondisclosure agreement honored.
- Marian Oliver McCaw Opera House in Seattle - IAQ consultant, construction IAQ management planning and LEED testing.
- Fortune-Shimmer Condo, Kirkland, WA. Featured in the New York Times, 1992, “A Home That Passed the Sniff Test.”
- Washington State Department Buildings, Health Department, Parks Department, and Consolidated Mail Services. All had ongoing IAQ complaints. Inspected, tested, and evaluated eight buildings for the state. Recommended remedial changes and HVAC system improvements for most.
- Executive jet crafts, Inspected and tested several private jets for IAQ problems. Remediation designs were provided.
- University of Washington – Tacoma Campus, Investigated and resolved flooded basement and water damaged HVAC systems.
- Tacoma General Hospital, Investigated IAQ problems and recommended changes to HVAC systems.
- American Lung Association, Developed training and evaluation protocols for the “Master Home Environmentalist” and “Child Care Center Asthma” programs.
- Investigated and Tested 30 Schools, Tested for mold contamination, fine dust and chemicals, recommended remedial actions. Evaluated over 100 classrooms, including preoccupancy, post occupancy and post remediation clearance testing.

Our goal in all investigations is to understand the root cause of the problem before offering solutions.
- WE DO NOT sell any equipment, filters etc.
- WE DO NOT recommend equipment (magic boxes) that promise to solve all your air quality problems.
- WE DO NOT believe that duct cleaning or treatment will, by itself, solve IAQ problems.
- WE DO work with you and your builder to identify sources of the problem.
- WE DO consult with Ph.D. micologists, chemists, toxicologists and M.D.’s when needed to solve problems.
- WE DO maintain resource lists of qualified professionals who can get the recommended work done.
- WE DO get most of our clients from client referrals and from government and nonprofit environmental organizations such as the American Lung Association, the EPA and Health Departments.
- Question occupants about symptoms, building history and problems.
- Look at the environment as a whole to determine all possible causes.
- List all the remedy options. Often we give the best or safest option followed by the next best or higher risk approach (usually the lower-cost option).
- Provide step-by-step instructions for what to do, how to do it and the products and services that have worked for our clients.
- Provide resource lists to help you get the job done right the first time.

Dan Morris B.S., CMR, President of EHSI/Healthy Buildings, Inc., is a Certified Indoor Environmentalist with over 30 years of theoretical engineering and practical investigation and design experience. Dan creates custom specifications for environmentally concerned clients for healthy homes and offices. He also provides training for architects, engineers, builders and health departments. Dan's focus is a multi-disciplined approach to investigating sick buildings in order to understand the building, its mechanical systems, and its occupants as an interrelated whole. He has experience as a building designer, homebuilder, and indoor air quality consultant. As a mechanical engineer for McDonnell Douglas Corporation, Dan designed environmental control systems for manned spacecraft and ground support equipment. As a designer and builder of homes, he gained hands-on experience in solving practical problems in both residential and commercial construction.
- Won two First Place Ventilation Awards at the 1987 Housing for the 90’s Conference in Tacoma, Washington.
- Written two indoor air quality books, numerous articles, and has given talks in the United States and Canada. Building a Healthier home: How to plan, Build and Maintain a Healthier home and Healthy Building Resource Guide.
- Expert in investigation, testing and remediation plans for buildings with IAQ issues, using an integrated multi-disciplined approach.
- Develops specifications for healthier buildings including; design, materials, HVAC systems and IAQ construction management
- Design and investigation of aircraft and spacecraft environmental systems.
- College lecturer, speaker and author of books and articles on indoor air quality in the US and Canada.
- Expert witness and consultant for environmental law and insurance cases
- Academic Training
BS – Mechanical Design, Rhode Island School of Design
Masters course work, Business Administration, UCLA
Extensive self-study and attendance at classes on all aspects of indoor air pollution, ventilation and environmental illness
Certified Mold Remediator, Indoor Air Quality Association, Inc., 2001
Certified Indoor Environmentalist, Indoor Air Quality Association, Inc., 2002
- Awards
First Place: Ventilation Award, New Construction
First Place: Ventilation Award, Retrofit Construction
- Memberships
Indoor Air Quality Association
Puget Sound Chapter - ASHRAE – Full Member
Washington State Indoor Air Council
Indoor Air Investigators Association of Washington
American Lung Association Steering Committee
Environmental Council of Washington
Human Ecology Action League
Washington Toxics Coalition
Cheri Zehner, M.P.H., has over 25 years of experience in public health and environmental health programs. She has been conducting indoor air quality investigations for the past 5 years on commercial, residential and academic buildings and also provides pollution prevention consultation services.
- Managed projects with the American Lung Association of Washington (ALAW) to provide educational workshops to school staff on EPA’s IAQ Tools for Schools Program and is an American Lung Association, Indoor Air Quality, Tools-for-Schools Master Trainer.
- Member of the advisory team for the Lung Association’s Master Home Environmentalist (MHE™) Program which promotes toxics reduction and improved indoor air quality in the home environment.
- 10 years experience in environmental consulting including managing and participating in human health risk assessments for a Superfund Site and environmental assessment and qualitative human health risk assessment for the King County Regional Criminal Justice Center.
- 10 years experience working in local health department programs and in organizing the King County Hazardous Waste Interagency Advisory Committee that assisted in developing policy for management of household and moderate risk hazardous waste.
- Certified by the Indoor Environmental Standards Organization as a Residential Mold Inspector.
- Master’s Degree in Health Services, (M.P.H.) and a Bachelor’s Degree in Environmental Health, both from the University of Washington.
Randall Peterson, R.S.,
Certified IAQ Specialist is a registered sanitarian and has over thirty years of experience in environmental health and safety programs. He has worked for County, State and Federal Public Health Agencies and spent many years in private industry developing and implementing IAQ programs, providing training and auditing, conducting investigations and writing reports and recommendations in public health and environmental compliance management systems. Randy is able to apply his broad base of knowledge in building science and public health in residential and commercial buildings and is qualified to conduct investigations, testing, training and develop protocols for remediation.
- Associated with such organizations as The Centers for Disease Control and Prevention (CDC), The National Environmental Health Association, The American Industrial Hygiene Association, The International Council of Cruise Lines and the National Sanitation Foundation.
- BS degree in biology Central Michigan University and 30 hours of graduate credit in environmental health from University of Michigan.
- Worked for county and State health department in Michigan and Chief of the Vessel Sanitation Program at Centers for Disease Control and Prevention.
- Worked for and consulted with Major cruise lines on Environmental Health Program management and development.
- Authored corporate health and safety manuals and Food service safety and hazardous waste handling training manuals.
- Member of select committee to develop both the Vessel Operations Manual and Vessel Construction manual for CDC.
- Member of NSF’s food Service Equipment standards committee six years and past Technical Section Chair for the National Environmental Health Food Safety Committee.
- Private consultant in indoor air quality investigations, IAQ testing and mold remediation in Florida and in Washington
- Member of the committee that drafted the ventilation performance standards for Food Service Facilities for the State of Michigan.
- Worked with industry leaders to develop ventilation standards for performance and IAQ compliance in luxury cruise ships, while working for The United States Public Health Service Vessel Sanitation Program (VSP) at the CDC.
- Chief of the VSP program and oversaw all inspectors, participated in the inspection process gaining hands on experience with improper air handling, problems with air balancing, back drafting and biological growth including bacteria and mold.
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Architects
Hundreds of Commercial/
Non-Profit Organizations including...
Mechanical Engineering Firms
Medical Facilities
Schools and Day Care Centers
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