To ensure a boiler remains burning continuously overnight, prioritize combustion optimization, maintain consistent water levels, implement regular maintenance schedules, and utilize high-efficiency fuel systems. First, optimize the air-fuel ratio to prevent熄火 (extinguishing) by adjusting blowers and feeders. Second, keep the boiler water level between 80-100% of its total capacity to avoid dry firing. Third, schedule weekly maintenance to clean tuyeres, check valve seals, and inspect for corrosion. Finally, upgrade to condensing boilers or modern low-nitrogen burners, which reduce fuel consumption by 20-30% compared to traditional models.

The key to sustained combustion lies in balancing heat input with thermal retention. According to the U.S. Department of Energy (DOE), proper water level management alone can prevent 15-20% of boiler downtime caused by low-water cutoff failures. A 2021 DOE study found that condensing boilers achieve 98-99% efficiency by capturing latent heat from exhaust gases, unlike conventional boilers that lose 5-10% through stack emissions. Regular maintenance, including tuyere cleaning, extends equipment lifespan by 15-20 years, as per ASHRAE Standard 90.1. Fuel switching to natural gas or propane instead of oil reduces operational costs by 40-50% annually, per the Energy Information Administration (EIA). For example, a 10MW boiler running on natural gas at $2.50/mmBtu spends $25,000 monthly versus $40,000 for No. 2 oil. Proactive measures like installing fuel flow meters and pressure-reducing valves further enhance consistency, ensuring 24/7 operation without fluctuations. Data from the EPA’s Energy Star program confirms that optimized boilers cut greenhouse gas emissions by 12-18% compared to suboptimal systems. In summary, combining efficiency upgrades, predictive maintenance, and cost-effective fuel selection guarantees uninterrupted nighttime operation while minimizing expenses and environmental impact.