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Monthly Archives: May 2019

 

We have reason to celebrate! Preferred successfully completed the UL testing of our 1200 HP Ultra-Low NOx Ranger burner at Johnston Boiler. We now have UL listing on the following:
API-AF : 50 HP through 600 HP
API-RF: 100 HP through 1200 HP Ranger-RF: 100 HP through 1200 HP
We also have ULB listings on the entire range of: API-AF, API-RF, and Ranger-RF.

UL LIsting is required to sell burners into New York City and to put together a UL listed boiler package.