Hotel · China
Ji Hotel Xi’an (Zhangba East Road Branch)
4 × outdoor commercial gas storage water heaters (model RSTW99-320)
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Factory in Dongying, Shandong, China
Commercial Low-NOx Condensing Gas Water Heaters
Full premix combustion with NOx below 30 mg/m³ and up to 107% thermal efficiency on condensing models.
2 yearsProduct warranty
24Project references in China
< 30 mg/m³NOx on premix low-NOx and condensing models
Up to 107%Thermal efficiency on condensing models
Product range
Commercial water heaters & boilers
Published specifications for every model, to support distributor stock decisions and project specification.
5 product families
Gas water heaters & boilers
CLASSIC storage water heaters, low-NOx PLUS and condensing PRO storage water heaters, premix fire-tube boilers and stainless steel condensing boilers.
Explore gas range →
3 product families
Electric water heaters & boilers
Commercial electric storage water heaters, large-capacity electric boilers and floor-standing electric heating boilers for sites where electric supply is preferred.
Explore electric range →Who we work with
Built for B2B partners
Distributors & importers
Published specifications for every model, to support distributor stock decisions. Gas type, voltage and other market-specific requirements are confirmed for each order.
Browse the product range →MEP contractors
Each product page lists capacity, heat input or power, hot water output, connection sizes, dimensions and weights, so you can specify and compare models.
See project references →OEM brand owners
For brand owners who want to sell commercial water heaters or boilers under their own brand. Customization can be discussed case by case.
OEM & private label →Project references
Featured projects
School · China
Yihe Middle School, Cangzhou
3 × indoor commercial low-NOx condensing gas storage water heaters (model RSTQ99-379L) + more
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Elderly care · China
Youxiang Shiguang Elderly Care Service Center, Hefei
12 × commercial low-NOx condensing gas storage water heaters (model RSTQ99-379L) + more
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Healthcare · China
Xuxing Town Community Health Service Center, Jiading District, Shanghai
7 × CLASSIC series commercial gas storage water heaters
View project →Manufacturing
Factory capability
Our production equipment includes enamel production lines, CNC punch presses, laser cutting machines, CNC bending machines, robotic welding systems and electrophoretic coating equipment. An in-house R&D team works on product development.
- Water heater tanks in Baosteel BTC340R enamel steel with a double-layer BLUE-ARMOR enamel coating
- Tank walls sandblasted before enameling; finished tanks pressure tested
- Full premix metal fiber surface combustion on low-NOx and condensing models
News & insights
Latest articles
Insights · October 13, 2026
Direct-Supply Storage Water Heaters vs. Boiler-and-Tank Systems
How direct-supply commercial storage water heaters compare with boiler, heat exchanger and storage tank systems for hotels, schools and other commercial buildings.
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Insights · October 13, 2026
How to Size Commercial Water Heaters for a Hotel: Worked Examples
A step-by-step method for sizing commercial gas and electric storage water heaters for hotels, using the design hourly heat load, with two worked examples.
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Insights · October 13, 2026
How Full-Premix Metal-Fiber Burners Keep NOx Below 30 mg/m³
Why fully premixed combustion with a metal-fiber burner cuts NOx emissions in commercial condensing water heaters, and what buyers should check when specifying low NOx equipment.
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