Thank you so much. Yes, there are several proven opportunities to improve natural gas fired hot water boiler efficiency, including adding insulation, adjusting the air-to-fuel ratio, and preheating combustion air. The impact of these measures depends on your boiler’s performance and operating conditions, which can be evaluated during an assessment. ITACs can help by conducting a no-cost assessment at your facility. As an example, here’s a case study where ITAC identified significant boiler efficiency opportunities for a distillery for similar type of boiler: https://ask.itac.energy/t/smooth-ambler-spirits-energy-assessment-identifies-major-opportunities-for-distilled-spirits-manufacturer/203. You can also view the detailed case study here: Smooth Ambler Spirits Case Study PDF. Please let us know if you’d like assistance connecting with your regional ITAC team.