Natural gas booster design has remained unchanged for decades...UNTIL NOW.

 

 

The ENGB has been approved by these specific agencies:

 

 

 

 

 

 

 

 

 

With the exception of the UL-listing, the above approval agencies are region-specific. Should your local agencies require any further documentation other than our UL-listing, please contact ETTER Engineering Toll Free at 1-800-444-1962 for further assistance.

 

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