From Nationwide Boiler's press releases, find the article about achieving 2½ PPM NOx with a 350HP firetube boiler. Identify the model name of the Oilon ultra-low NOx burner mentioned and describe its key features that enable such low NOx emissions without requiring flue gas recirculation (FGR) or air filters.
Navigate to the 'Resource Center' from the homepage. Click on the 'Press Releases' section. Scroll down the page to locate the press release titled '2½ PPM NOx Achieved at Source Test for 350HP In-Stock Package Firetube Boiler'. Click on the identified press release to open it. Read the article to identify the specific model name of the Oilon ultra-low NOx burner. Extract the key features or technology mentioned that enable the burner to achieve ultra-low NOx without Flue Gas Recirculation (FGR) or air filters. Synthesize the findings into a concise answer.
Successfully navigate to and open the specified press release. Accurately identify and state the Oilon burner model name as 'LN30 (also known as the ULN2.5)'. Accurately state that the burner is constructed with patent pending technology. Accurately state that it achieves single digit, ultra-low NOx with lower residual oxygen, no air filters, and no flue gas recirculation (FGR) while utilizing conventional gas delivery pressures.