Last Updated： Aggregation Period:Aug 26, 2026～Sep 22, 2026
This ranking is based on the number of page views on our site.
Last Updated： Aggregation Period:Aug 26, 2026～Sep 22, 2026
This ranking is based on the number of page views on our site.
Last Updated： Aggregation Period:Aug 26, 2026～Sep 22, 2026
This ranking is based on the number of page views on our site.
1～25 item / All 25 items
This is a series of connected simple flow boilers.
Compact and slim EQR-500 model × 3 connected with a width of 2,570mm space-saving design. It supplies high-quality steam with a dryness of over 99%.
This is the birth of an environmentally friendly boiler that pursues the value of the boiler itself and has the industry's best environmental performance and energy-saving capabilities.
In recent years, as there has been a strong demand for equipment with excellent environmental and energy-saving properties, we have achieved ultra-low emission combustion with NOx = 25ppm at a low air ratio by restricting the combustion air, becoming the first in the industry to do so. (Small-scale once-through boiler)
Achieve significant energy savings with a boiler efficiency of 98% and high-efficiency operation! Super Equos Series
The "EQi-3000NM/LM" is a compact, direct-flow boiler that achieves significant energy savings without unnecessary starts and stops. With combustion control at 0-20-50-100%, efficiency is greatly improved at 20-30% load. It provides stable dry steam through water level control according to steam pressure and combustion volume. Additionally, the blower and feed water pump are inverter-controlled. 【Features】 ■ High energy savings through high-efficiency operation ■ Supply of stable, high-quality dry steam ■ Low noise design ■ Inverter standard equipment ■ Low NOx emissions to reduce environmental impact *For more details, please refer to the PDF document or feel free to contact us.
Advancing from evolution! A compact water-tube boiler with improved energy efficiency, safety, and visibility.
The "SE Series" is a gas-fired compact flow boiler that is thoroughly committed to "energy saving." Our unique micro-furnace boiler body and newly designed economizer have standardized a boiler efficiency of 98% during rated operation. Furthermore, at a low combustion position that allows for ample heat transfer area relative to the combustion volume, the operating efficiency exceeds 100%. Burners with a large turn-down ratio (the ratio of maximum to minimum combustion volume) have a wide combustion range, enabling efficient operation even during periods of low steam usage. Additionally, it maintains energy-saving operation with minimal purge loss due to combustion start and stop. 【Features】 ■ Multi-position water supply ■ Enhanced combustion monitoring & dual processor ■ High-speed blower motor ■ Low fuel consumption with efficiency exceeding 100% ■ Energy-saving operation with a wide combustion range of 1:7 that reduces combustion stops *For more details, please refer to the PDF materials or feel free to contact us.
Achieving a boiler efficiency of 98%! Award for Excellent Energy-Saving Decarbonization Equipment and Systems for Fiscal Year 2021.
"WILLHEAT" is a hydrogen-only small-scale once-through boiler equipped with a dry low NOx burner. We have successfully reduced the generation of nitrogen oxides (thermal NOx) without sacrificing boiler efficiency, which has been a long-standing challenge. The steam pressure fluctuation is ±0.005 MPa, and the steam dryness is over 99.8%. Please feel free to consult us when you need assistance. 【Features】 ■ Boiler efficiency 98% ■ Low NOx 60 ppm (converted to O2=0%) ■ Steam pressure fluctuation ±0.005 MPa ■ Steam dryness over 99.8% *For more details, please refer to the PDF materials or feel free to contact us.
![[Helpful Materials Provided] Efficient Operation of a Flow-through Boiler - Load Edition -](https://image.mono.ipros.com/public/product/image/c34/2001427627/IPROS75376776787848575613.png?w=280&h=280)
Explanation of boiler load and low-load operation! Introducing the benefits and pitfalls as well.
This document introduces efficient operation of once-through boilers. The term "boiler load" represents the numerical value indicating how much of the boiler's capacity is being utilized, and it explains the most efficient load range using graphs. Additionally, it covers the advantages and pitfalls of low-load operation. Please download and take a look. 【Contents】 ■ What is boiler load? ■ Efficient "low-load operation" ■ Pitfalls of low-load operation ■ How to operate once-through boilers efficiently *For more details, please download the PDF or feel free to contact us.
Short steaming time, high efficiency and energy-saving! Equipped with a scale monitor despite its compact design!
The "Multi-tube Water Pipe Flow Boiler" is a boiler that achieves short steam generation time, high efficiency, and energy savings through simple and safe automatic operation. The boiler body is made from carefully selected steel materials to ensure long service life. Additionally, by equipping a scale monitor inside the water pipes, it can early detect and notify about the adhesion of scale, which significantly affects the internal lifespan of the pipes and the efficiency of the boiler. Moreover, compared to our conventional models, it features a compact design that saves space. We conduct thorough product management through in-house design and manufacturing to provide high-quality products. 【Features】 ■ Simple and safe automatic operation ■ Short steam generation time, high efficiency, and energy savings ■ Long service life with carefully selected steel materials for the boiler body ■ Space-saving achieved through compact design ■ Equipped with a scale monitor *For more details, please refer to the PDF materials or feel free to contact us.
Contributing to global warming prevention with high-efficiency specifications! The can body is made from carefully selected steel materials, ensuring long lifespan!
Nihon Kikan Co., Ltd. offers a "Compact Flow Boiler" that enables easy and safe automatic operation. It achieves a short steam generation time and high efficiency for energy savings. Combined with the patented Fuel Saver, it achieves a boiler efficiency of 95% (based on O2 3%). Additionally, by equipping a scale monitor inside the water pipes, we can early detect and notify you of the adhesion of scale to the pipes, which significantly affects the lifespan of the boiler and its efficiency. 【Features】 ■ Easy and safe automatic operation ■ Short steam generation time, high efficiency, and energy savings ■ Long lifespan achieved using carefully selected steel materials for the boiler body ■ Space-saving design compared to our conventional models *For more details, please refer to the PDF materials or feel free to contact us.
We handle water heaters and general-purpose products.
We handle general-purpose boilers from IHI Corporation. Leveraging our extensive experience and achievements accumulated over many years, we can provide comprehensive services including the sale and installation of boiler-related machinery and equipment, piping work, and water supply and drainage facility construction, as well as electrical work and control work related to these services, which typically require multiple companies. Please feel free to contact us if you have any requests. 【Our Strengths】 ■ We can also accommodate compact, container house-style boilers that have been recently modularized. ■ We can handle projects that typically require multiple companies all in one go. ■ We can conduct annual performance inspection work for boilers and pressure vessels that require application to government agencies. ■ We have two specially certified boiler welders for maintenance work on boilers and pressure vessels that require application to government agencies. ■ We propose rational equipment ideas based on our experience, among other services. *For more details, please feel free to contact us.
Achieving high operational efficiency by reducing the number of boiler start-stop cycles. Significant savings on fuel and electricity costs.
A once-through boiler that achieves high operating efficiency by reducing the number of boiler operation stops, contributing to significant savings in fuel and electricity costs. 【Features】 ○ Dramatic improvement in operating efficiency and boiler lifespan with four-position combustion control ○ Reduction in fuel and electricity consumption ○ Detailed combustion control with 'high combustion (100%)', 'medium combustion (65%)', 'low combustion (30%, SE series is 20%)', and 'stop' ○ Various products available according to application, such as 'simple once-through boiler', 'compact once-through boiler', and 'small-scale boiler' ● For other functions and details, please contact us.
This is a series of connected simple flow boilers.
The EQR-750 model, which is angular and slim, has achieved the series' smallest width of 2,410mm with a three-link configuration.
This is a series of connected simple flow boilers.
Equipped with powerful capabilities, the EQRH-1000 features a space-saving design with a width of 2,770mm when three units are connected.
This is the birth of an environmentally friendly boiler that pursues the value of the boiler itself and has the industry's best environmental performance and energy-saving capabilities.
In recent years, as there has been a strong demand for equipment with excellent environmental and energy-saving properties, we have achieved ultra-low emission combustion with NOx=25ppm using a low air ratio with restricted combustion air, making us the first in the industry to do so. (Large-scale once-through boiler)
Compact, space-saving design
The simple and rational can body boasts high durability and stable performance that surpasses the concept of a once-through boiler.
Boiler efficiency over 98% at partial load! Industry-leading once-through boiler.
The "EQi-6001KM/AM" is a once-through boiler that maintains high operational efficiency without repeatedly starting and stopping, even when the steam load is low. Even during load fluctuations, the steam dryness is excellent, allowing for the supply of high-quality steam. There is also the "EQiH-6001KM/AM," which has different performance specifications and connection pipe diameters. 【Features】 ■ Industry-leading ultra-high efficiency operation ■ Provision of high-quality steam ■ High load-following performance through PI control ■ High turndown ratio (5:1) and excellent combustion performance ■ Adoption of blow control responsive to feedwater flow variations (Patent No. 5826539) *For more details, please download the PDF or feel free to contact us.
Introducing the Super Equos series, featuring a compact body boiler package!
The "EQi-2000・2500NM/LM" is a compact once-through boiler that achieves a stable high steam dryness of over 99%. It features advanced water level control based on two parameters: combustion volume and pressure, along with a newly designed inverted separation type steam-water separator, making it resilient to load fluctuations. Additionally, due to low air ratio combustion, the boiler efficiency reaches an industry-leading 98%. By restricting the combustion air, there is no need to heat excess air beyond what is required for combustion, which improves boiler efficiency. 【Features】 ■ Supplies high-quality steam ■ Ultra-high efficiency & energy-saving ■ Space-saving design ■ Ultra-low emission combustion reduces environmental impact ■ Low pressure loss & high-efficiency boiler body *For more details, please refer to the PDF materials or feel free to contact us.
Achieving ultra-high efficiency operation! The Super Equos series enables the supply of high-quality steam.
The "EQi(H)-6001NM/LM" is a flow-through boiler with a steam output of 6,000 kg/h. It has achieved a boiler efficiency of over 100% at partial loads. Even when the steam load is low, the boiler does not repeatedly start and stop, maintaining high operational efficiency. Additionally, the proportional control burner with a high turn-down ratio has improved operational efficiency and load-following capability at low loads. 【Features】 ■ Ultra-high efficiency operation ■ PI control (pressure control) ■ Stable supply of high-quality dry steam ■ Reduced environmental impact through efficient operation ■ Blow control responsive to fluctuations in feedwater quantity *For more details, please refer to the PDF document or feel free to contact us.
Achieving significant energy savings without unnecessary starts and stops! The Super Equos series realizes low noise.
The "EQi-2501KM/AM" is a large-capacity compact flow boiler with a steam generation capacity of 2.5t/h. It features a proven double-row concentric cylinder design that enhances durability through uniform heating. Additionally, its large water capacity (180L) allows for excellent load-following capability due to self-evaporation during pressure drops. The efficiency of the blower has been improved, and power consumption has been significantly reduced through inverter control. 【Features】 ■ High energy savings due to high-efficiency operation ■ Increased capacity ■ Standard inverter equipment ■ Low noise design ■ Stable supply of dry steam *For more details, please refer to the PDF document or feel free to contact us.
Evaporation rate 2.5t/h! The definitive industrial oil-fired boiler that achieves energy saving and labor saving!
The "SSB-A Series" is a small oil-fired boiler that can reduce fuel costs and be used for a long time. With its unique water level control method, "Linked Water Level Control System," it can stably supply high dryness steam and reduce fuel costs. 【Features】 ■ Small boiler with an evaporation capacity of 2.5t/h ■ Standard equipment includes an inverter for the blower and feed water pump for energy saving and low noise ■ Easy-to-read display in kanji ■ Stable supply of high dryness steam ■ Durable round-shaped boiler structure *For more details, please refer to the catalog or feel free to contact us.
Stable steam pressure! A multi-tube once-through boiler with high performance, high functionality, and long lifespan comparable to large boilers.
The "Ifrit Series" is a multi-tube water-tube boiler equipped with a high-performance economizer that combines two types of high-performance heat transfer tubes: exhaust gas downflow and aluminum fins/SUS fins, achieving a boiler efficiency of 98%. By adopting PI control, it has improved not only the rated efficiency but also the partial load efficiency. This significantly contributes to enhancing the actual operational efficiency in real-world operations. There are two models available: the gas-fired boiler "Ifrit-Beat type" with a pressure of 0.98 MPa, and the oil-fired and gas-fired boiler "Ifrit-C type." 【Features】 ■ High performance, high functionality, and long lifespan comparable to large boilers ■ Ease of handling of water-tube boilers ■ Stable steam pressure ■ Convenient color touch panel ■ Low fuel consumption system (exhaust gas O2 control) For more details, please refer to the catalog or feel free to contact us.
![Flow-through Boiler Ifrit Series [High-quality steam with high efficiency]](https://image.mono.ipros.com/public/product/image/b5e/2000244782/IPROS37458748126564158713.jpeg?w=280&h=280)
A flow-through boiler that achieves high performance, high functionality, and long lifespan comparable to large boilers! Providing high-quality steam more efficiently, more compactly, and more conveniently!
The "Ifrit Series" is a once-through boiler developed with the aim of achieving functionality and durability comparable to large boilers. It provides high-quality steam from Ifrit more efficiently, more compactly, and more conveniently. 【Features】 ■ Adopts an excellent PID control system comparable to large water tube boilers ■ Achieves boiler efficiency of 99%. Significant reductions in annual fuel costs and CO2 emissions are possible ■ Realizes approximately 27% space savings compared to three 2t/h small once-through boilers ■ Equipped with a color touch panel and self-diagnosis and safe mode functions *For more details, please request materials or view the PDF data available for download.
![Compact Flow Boiler "Willheat" [Achieving High Durability, High Efficiency, and Energy Saving]](https://image.mono.ipros.com/public/product/image/8eb/2000311775/IPROS65025888087031282138.jpeg?w=280&h=280)
A compact water-tube boiler that achieves reduced maintenance costs due to high durability! It delivers high durability, high-quality steam, high efficiency, and energy savings!
"Willheat" is a small once-through boiler developed based on heat exchange technology, combustion technology, and pressure/water level control technology cultivated in large boilers. It achieves high durability, high-quality steam, high efficiency, and energy savings. An evolved high-performance package is available to support increased productivity. 【Features】 ■ Long lifespan ■ High dryness / Wide turndown ■ PID multi-unit control / Energy saving ■ Low NPx / Lightweight and compact *For details, please request materials or view the PDF data from the download.
Aren't you postponing that inspection? An explanation of its obligation and importance!
■Do you know that boiler inspections are mandatory? Boilers are legally required to undergo an annual inspection and maintenance called a "performance inspection," similar to a vehicle inspection. It is necessary to ensure that there have been no legal violations in the past two years and that inspections are conducted using the legally mandated equipment by qualified inspectors. So, what happens if you neglect the inspection? ■What happens if you neglect the inspection? Preventive maintenance is crucial, rather than relying on after-the-fact maintenance once a failure occurs. If you leave the boiler unchecked until it breaks down, it can shorten the lifespan of the boiler itself. In fact, there are cases where a performance inspection is not required. ■Even if a performance inspection is not required, do not let your guard down! Currently, the mainstream flow-through boilers often fall under the category of simple boilers, which may not require a performance inspection. However, even in such cases, regular inspections (spot checks) are necessary to detect internal damage, pipe cracks, and deterioration due to rust early on. ■Please consult us first! Feel free to consult us regarding maintenance periods and content, such as the replacement of liquid level gauges.
![Why do once-through boilers become unstable? [Basic Knowledge]](https://image.mono.ipros.com/public/product/image/2094936/IPROS9816135061623283805.jpg?w=280&h=280)
Is the rapid steam generation and instability caused by the same factor? An explanation of the structure of a once-through boiler.
■What is the structure of a once-through boiler? It is a type of boiler composed of pipes, where water is fed in from one side and steam is extracted from the other. It has a small water capacity, allowing for quick steam generation. Additionally, it is compact, requiring less installation space for the boiler. ■Why can it produce steam quickly? Having a small water capacity means there is less water to heat. The less water there is to warm, the quicker it can reach boiling and vaporization. Therefore, both water tube boilers and once-through boilers have the advantage of being able to produce steam relatively quickly compared to cylindrical boilers. ■Does this also make it unstable for the same reason? On the other hand, having a small water capacity means there is also less water reserve to maintain pressure and water level when the steam usage suddenly changes. As a result, pressure and water levels can fluctuate easily due to load variations, making operation more unstable, which requires quick control measures such as adjusting the feed water flow. ■Summary The same characteristic of having a "small water capacity" creates both the advantage of quick steam production and the disadvantage of potential operational instability. Please feel free to consult with us first.
