Level 4 Enclosure Integrity Testers

These companies own door-fan test equipment and Windows software for testing enclosure integrity. They employ at least one Level 3 certified technician who has been certified to conduct the NFPA blower door test procedure.

Level 4 testers are certified on ISO testing and advanced pressure venting tests, both using complicated multi-point techniques.

There are no companies with Level 4 testers in your area.

Level 3 Enclosure Integrity Testers

These companies own door-fan test equipment and Windows software for testing enclosure integrity. They employ at least one Level 3 certified technician who has been certified to conduct the NFPA blower door test procedure.

Level 3 testers are certified to perform multiple blower tests for large enclosures, NFPA lower leak measurement using ceiling neutralization, extended discharge systems and sub-floor only testing.

There are no companies with Level 3 testers in your area.

Level 2 Enclosure Integrity Testers

These companies own door-fan test equipment and Windows software for testing enclosure integrity. They employ at least one Level 2 certified technician who has been certified to conduct the NFPA blower door test procedure.

Level 2 testers are certified on the NFPA single blower door fan tests & field calibration tests.

Engineered Designed Facilities, Inc. 149 Weldon Parway, Suite 111 Maryland Heights , MO  63043 Phone: (314)620-4612 Fax: (314)569-2549	N64	William Crusen, Level 2
Progressive Electronics Inc Grandview , MO   Phone: Fax:	N64	Keith Peters, Level 2

Level One Certified Techniciains

These companies own door-fan test equipment and Windows software for testing enclosure integrity. They employ at least one Level 2 certified technician who has been certified to witness the NFPA blower door test procedure.

Level 1 testers are trained in enclosure theory & design, and are certified to witness but but not perform the NFPA blower door test.

There are no companies with Level 1 testers in your area.

Companies that own Retrotec Equipment but don't have registered technicians.

Companies listed below own Retrotec equipment, but have not been certified by Retrotec to perform the NFPA blower door test.

Advanced Fire Inc 301 N Locust CT Oak Grove MO  64075 Phone: Fax: (816)690-7573	HA5*
Bick Group Saint Louis MO   Phone: Fax:	970
Cintas/Alltype Fire Prtection St. Louis MO   Phone: Fax:	E4AC
George Hay Co. Jefferson City MO  65801-0907 Phone: (417)860-8269 Fax:	Q870
International Fire Sprinkler St Louis MO   Phone: Fax:	N64