Unit Selection & Comparison Tools
We make it easy to pick your units!
Please use the Unit Selection Tool below to determine which Best Purging Systems Unit will properly satisfy the requirements of your application.An easy, step-by-step process allows you to select all critical variables.
You may also click the button below to open a separate page with another tool that allows you to select from a list of other manufacturers, pick a model, and easily find a Best Purging Systems Unit that is most compatible.
You may then toggle between the two website pages to compare results if you’re replacing an existing competitor’s Unit, or if you’re not certain another manufacturer’s unit specification will satisfy your application.
The following tools provide results for Type Y & Z Purging & Pressurization Units only.
Regretfully, these tools will not function or appear properly using Internet Explorer or Safari.
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NFPA 496 Purging & Pressurization Unit Types
Type Z Units protect ordinary location equipment within sealed enclosures that are located in Class I, Division 2, Group A, B, C or D & Class II, Division 2, Group F or G Locations.
Type Y Units protect Division 2 rated equipment within sealed enclosures that are located in Class I, Division 1, Group A, B, C or D & Class II, Division 1, Group F or G Locations.
Type X Units protect ordinary location equipment within sealed enclosures that are located in Class I, Division 1, Group A, B, C or D & Class II, Division 1, Group E, F or G Locations.