![]() Andrews Filter & Supply Andrews Filter is a manufacturer and distributor servicing of filters and filtration systems. | Sentry Air Systems Sentry Air Systems (SAS) is a company that designs and manufactures air purification systems. | ![]() Calgon Carbon Calgon Carbon Corporation is a manufacturer of activated carbon products for air and water purification. | |||
Founding Date | Founding Date 1952 | Founding Date 1971 | Founding Date 1983 | Founding Date 1968 | Founding Date 1942 |
Type | Type Subsidiary | Type Private | Type Private | Type Subsidiary | Type Subsidiary |
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Locations | Locations Houston, US HQ | Locations Orlando, US HQ | Locations Cypress, US HQ | Locations Louisa, US HQ Allentown, US Statesville, US | Locations Moon Township, US HQ Feluy, BE Sao Paulo, BR Suzhou, CN Fredericia, DK Rueil Malmaison, FR Hattersheim Am Main, DE see more |
Employees | Employees 536% increase | Employees 15 | Employees 23 | Employees 800 | Employees 7281% increase |

Andrews Filter is a manufacturer and distributor servicing of filters and filtration systems.
View companySentry Air Systems (SAS) is a company that designs and manufactures air purification systems.
View company
Calgon Carbon Corporation is a manufacturer of activated carbon products for air and water purification.
View company