ZOZEN Boiler Clarifies: 29 MW Hot-Water Boiler ≈ 40-Ton Class, Offers Free Sizing Guidance

Yixing, Jiangsu — ZOZEN Boiler has addressed a common sizing question in the heating and industrial boiler market: how many “tons” is a 29 MW hot-water boiler? According to the company’s technical guidance, a 29 MW hot-water boiler corresponds to roughly a 40-ton class unit under the industry’s conventional conversion standards.

• Boiler thermal capacity can be expressed in several units:
  • kcal/h (kilocalories per hour): heat output per hour
  • t/h (tons per hour): a colloquial unit derived from steam boiler output at rated conditions, used as a shorthand for thermal capacity
  • MW (megawatts): international unit of thermal power, where 1 MW = 10^6 W

ZOZEN notes the widely used industry conversion:

• 0.7 MW ≈ 1 t/h ≈ 600,000 kcal/h

Applying this to a 29 MW hot-water boiler:

• 29 MW ÷ 0.7 ≈ 41.4 t/h (commonly referenced as a “40-ton” class in practice)

As an example of model designation, WNS29-1.25/130/70-Q indicates a hot-water boiler with a rated thermal output of 29 MW; the remaining code elements denote pressure and supply/return temperatures.

ZOZEN emphasized that knowing the conversion alone is not sufficient for final selection. Proper sizing also requires auditing total heat demand, operating conditions, peak/valley loads, system temperatures, and safety margins. The company offers free selection guidance and application-specific solutions.

ZOZEN Boiler provides 29MW gas-fired hot water boiler for different industries

With more than three decades of development, ZOZEN Boiler reports a broad portfolio covering gas-fired, biomass, coal-fired, circulating fluidized bed (CFB), and thermal oil boilers, serving sectors such as chemicals, food, brewing, district heating, paper, textiles, and rubber.

For centralized heating applications, ZOZEN highlights its SZS series gas-fired hot-water boilers, which the company says feature:

• Large furnace chamber with complete combustion, compatible with ultra-low-NOx burners (NOx ≤ 30 mg/Nm³)
• Full membrane-wall construction for enhanced sealing
• Thermal efficiency above 95%
• Fully automatic, safe operation to help reduce operating costs

ZOZEN invites users seeking clarity on the “29 MW equals how many tons” question—or any boiler sizing matter—to consult its engineering team for no-cost selection support and tailored system recommendations.