Low-Nitrogen Vacuum Hot Water Boiler Project at an Administrative Office Complex in Hanoi, Vietnam

Project Overview

A government administrative office park in Hanoi serves as a key local government office complex, comprising office buildings and civil servant dormitories. Winter heating not only affects staff comfort but also directly impacts the efficient delivery of government services. With ever-increasing demands for energy conservation, reduced consumption, and environmental protection, the existing heating system suffered from issues such as high energy consumption, insufficient stability, and non-compliant emissions, making an upgrade and renovation urgently necessary. After a comprehensive evaluation of multiple boiler manufacturers and a comparison of their proposals, the park’s management ultimately chose to partner with Huanuo Boilers to implement a differentiated clean heating solution.

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Solution

uo Boilers’ technical team conducted an in-depth study of the park’s architectural characteristics and operational requirements:As daytime work spaces, the office areas require high precision in temperature control and rapid response times, necessitating precise, time- and zone-based heating;The dormitory areas, being living spaces, place greater emphasis on heating comfort and quiet operation.Based on this, Huanuo Boiler innovatively proposed a differentiated heating solution:

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Office areas

Equipped with one Huanuo ZWNS2.8-1.0/95/70-Q low-nitrogen vacuum hot water boiler. This unit delivers rapid response and precise temperature control, meeting the office area’s needs for time- and zone-specific heating, while its vacuum operation design ensures safety and reliability.

Dormitory Area

Equipped with one Huano ZKS2.1-85/60-Q low-nitrogen vacuum hot water boiler. This boiler provides stable heating temperatures and operates quietly and comfortably, fully ensuring a pleasant living experience.

Through intelligent interlinked control, the two systems maximize overall energy efficiency while balancing comfort and energy savings.

Core Project Advantages

The dual-system collaboration perfectly adapts to the heating needs of both office and residential environments.

After 20 consecutive days of operational monitoring, all system performance metrics exceeded design standards, and environmental indicators far surpassed local industry requirements.

Energy consumption and O&M costs during the heating season were significantly reduced, enabling green, low-carbon operation.

It provides a replicable model for comprehensive heating renovations in government facilities with “office + residential” configurations.

Client Testimonial

“Huanuo Boilers innovatively adopted a differentiated heating solution that not only meets the precise temperature control needs of office spaces but also ensures a comfortable experience in residential areas. Both the system design and environmental performance metrics have reached advanced industry standards; we are very satisfied with this collaboration.”

Le Quang Minh.

Head of Park Facilities Management

“Huanuo’s SZS series steam boiler has performed very stably on our continuous paper production line. The steam pressure fluctuation is minimal, fully meeting the high-quality steam requirements of the drying cylinders. After more than a year of operation, it has maintained high thermal efficiency and a low failure rate—one of the most reliable pieces of equipment on our line.”

Budi Santoso.

Equipment Manager, a major paper group in Indonesia

“Pharmaceutical processes have extremely high requirements for steam cleanliness and temperature control. Huanuo’s electric steam boiler produces clean steam with no on-site emissions and provides precise temperature control. It helped us smoothly pass several international quality system audits. It is a boiler that truly understands the needs of the pharmaceutical industry.”

María González.

Production Director, a pharmaceutical company in Mexico

“Our hotels have very high requirements for the quietness and safety of hot water supply. Huanuo’s vacuum hot water boiler operates very quietly and maintains a stable water temperature—guests hardly notice the equipment is there. Since the upgrade, hot water complaints have dropped significantly, and management has become much easier.”

Ahmed Hassan.

Head of Engineering, a hotel group in Egypt

“The stenter machines in our dyeing and finishing process are very sensitive to thermal oil temperature stability. Huanuo’s thermal oil heater heats up quickly with minimal temperature fluctuation, and the finishing effect has improved noticeably. Fuel consumption is also considerably lower than that of the original equipment. Their after-sales service responds promptly, making the cooperation very smooth.”

Mehmet Yılmaz

Production Manager, a textile dyeing and finishing company in Türkiye

“Our washing workshop requires frequent steam on/off cycles and has limited space. Huanuo’s once-through steam boiler occupies a small footprint and produces steam within 2 to 4 minutes, fully keeping up with our pace. The steam is stable and operation is simple—very suitable for our high-intensity washing conditions.”

Rafiq Islam.

Operations Supervisor, a garment washing company in Bangladesh

“Food processing has strict requirements for both steam quality and emissions. Huanuo’s condensing steam boiler has high thermal efficiency and a low exhaust gas temperature, with NOx emissions far below local standards. It helped us easily pass environmental reviews, while natural gas costs have also dropped noticeably.”

Khalid Al-Farsi

Plant Manager, a food processing plant in Saudi Arabia

“We use local agricultural and forestry residues as boiler fuel. Huanuo’s biomass steam boiler has strong fuel adaptability and runs stably, which not only reduces fuel costs but also eases solid waste disposal pressure. Emission indicators meet local environmental requirements, and the overall benefits have exceeded expectations.”

Johan van der Merwe

Energy Manager, a beverage producer in South Africa

“Chemical plants have extremely high requirements for heat source continuity. The waste heat boiler customized by Huanuo fully recovers waste heat from process tail gas and produces steam stably, significantly reducing the cost of purchased steam. Since commissioning, the equipment has operated reliably and provided real help for our energy-saving and consumption-reduction efforts.”

Rajesh Kumar

Technical Director, a chemical company in India

“Our region has long winters and extremely low temperatures, so heating equipment must withstand severe conditions. Huanuo’s hot water boiler starts quickly and supplies heat stably even in low-temperature environments. Throughout the entire heating season, there were no unplanned shutdowns, and our residential heating guarantee capability has improved markedly.”

Dmitry Ivanov

Operations Manager, a district heating company in Russia

“Our exported fruits and vegetables have very high requirements for drying color and moisture content. Huanuo’s hot air furnace provides precise temperature control and clean hot air. After drying, the fruits and vegetables retain a natural color and stable quality, fully meeting export standards. Energy consumption is also lower than that of the original equipment, giving us more reliable capacity during peak season.”

Camila Rojas.

Production Head, a fruit and vegetable processor in Chile