Low NOx heaters reduce nitrogen oxide (NOx) emissions during operation, minimizing harm to the environment. Enerquip’s low NOx heaters are designed to meet stringent emissions standards, achieving:
- Less than 30 PPM with an upgraded burner and flue gas recirculation
- Less than 9 PPM with an ultra-low NOx mesh head burner
Low NOx hot oil heater with a flue gas recirculation duct and integrated economizer section.
How Do Low NOx Heaters Reduce Emissions?
Nitrogen oxide, or NOx, is a greenhouse gas that is known to cause harm to the environment. We can minimize NOx formation through the installation of a large flue gas recirculation duct on the opposite end of the system. This duct returns the exhaust gas to the burner. By reburning the exhaust gases, our heaters can achieve less than 30 PPM. Or, for the greatest environmental impact, less than 9 PPM with an ultra-low NOx mesh head burner.
Whether it’s due to regulatory requirements, permitting restrictions, or green initiatives, Enerquip can help you meet your low NOx goals.
Low NOx Heaters from Enerquip
The Enerquip serpentine coil heater has many distinct advantages when a low NOx heater or burner system is required. Some of these advantages include:
Large Combustion Volume
Our serpentine coils, and the space between them, offer a large combustion volume in the radiant section of our heater. This large combustion volume becomes an advantage for low NOx because it reduces the volumetric heat release as well as the overall firebox temperature, thereby reducing NOx formation.
Low Stack Temperature and Integrated Economizer Section
Enerquip’s serpentine coil heaters come standard with a built-in convection section (economizer). This convection section of the Enerquip heater is designed to reduce the gas temperature leaving the heater to 100 °F above the incoming hot oil temperature. The lower the gas temperature (with the flue gas recirculation design) of the burner, the less NOx is formed during combustion.
Large Flue Gas Recirculation Duct
The Enerquip design has the stack at the opposite end of the burner. There is a relatively long run of flue gas recirculation duct required. We oversize this duct and, in most cases, will use a 10-inch diameter duct. The large surface area of the duct will quickly allow the flue gas to give up heat and reduce the gas temperature even further at the entrance to the burner. This reduced temperature will, again, allow for less NOx formation.
Maximizing Sustainability: Pairing Low NOx Heaters with Steam Generators
Pairing a low NOx thermal fluid heater with an industrial steam generator enhances both efficiency and environmental sustainability. Instead of relying on a separate boiler, steam generators use heat from the thermal fluid system to produce steam, reducing fuel consumption and emissions with a single emissions source. This setup offers key benefits:
- Improved Energy Efficiency – Transfers heat more effectively, reducing fuel usage and operational costs.
- Lower Emissions – Indirect steam generation means fewer combustion cycles and reduced NOx output.
- Water Conservation – Unlike traditional boilers, steam generators minimize water waste and chemical treatments.
- Extended Equipment Life – Reduces scaling, corrosion, and maintenance requirements.
Contact Us
Whether you’re in the budgeting or planning stage, we’re here to help. Contact us or request a quote to speak with a team member about our low NOx heater solutions.
American Heating Company is now Enerquip Thermal Solutions.