TBLN Series Condensing Gas Boiler
High-efficiency heating for commercial buildings, schools, and residential complexes (60-2800kW)
The TBLN Series Condensing Gas Boiler covers a power range of 60-2800kW across 14 models, delivering maximum 108.9% thermal efficiency with ultra-low NOx emissions of ≤30mg/m³. We have deep cooperation with world-renowned enterprises such as Bekaert (Netherlands), Dungs (Germany), EBM (Germany), Siemens (Italy), and SIT (Italy) to produce high-efficiency, energy-saving, intelligent, convenient, and reliable low-nitrogen condensing boiler products.
Key Advantages
- Max 108% thermal efficiency across the entire series — significantly higher than conventional boilers
- Ultra-low NOx emissions at 30mg/m³ — easily meets increasingly stringent environmental regulations
- 30-year design life — 2x the lifespan of conventional boilers, with superior total cost of ownership (TCO)
- ~37% floor space saving — compact design ideal for commercial projects with limited space
International Component Partners
- Bekaert (Netherlands) — Heat exchanger technology
- Dungs (Germany) — Gas valve and burner control systems
- EBM (Germany) — High-efficiency fans and blowers
- Siemens (Italy) — Intelligent control systems
- SIT (Italy) — Precision gas components
Condensing Technology
Understanding how high-efficiency condensing boilers work
How a Condensing Gas Boiler Works
A condensing hot water boiler is equipped with a flue gas heat exchange system that lowers exhaust gas temperature and recovers latent heat from condensed water vapor in the flue gas. The higher the water vapor content in the flue gas, the more latent heat is recycled — natural gas is rich in hydrogen, generating substantial water vapor after combustion.
Main component of natural gas: Methane (CH₄)
Combustion reaction: CH₄ + 2O₂ → CO₂ + 2H₂O(g) + 8600 kcal
When 1m³ of natural gas fully combusts, it produces 2m³ of gaseous water vapor and releases 8600 kcal of heat. Total heat released reaches approximately 880 kcal if all water vapor in the flue gas is condensed. The condensate liquid produced during this process is safely discharged via the integrated drainage system, requiring only standard plumbing connections.
Thermal Efficiency: Why It Can Exceed 100%
Condensing boilers recover heat that conventional boilers waste. Two mechanisms drive the efficiency gain:
- Reduced flue gas exhaust temperature cuts sensible heat loss, boosting efficiency by 3%~5%. By lowering the exhaust temperature to as low as 40–50°C, the boiler minimizes sensible heat loss and ensures stable performance even under variable load conditions.
- Latent heat recovery from condensed flue-gas steam adds another 5%~10%.
Total comprehensive efficiency improvement: 8%~15%, greatly reducing energy consumption.
The key: conventional boilers calculate efficiency against Net Calorific Value (NCV = 8600 kcal/Nm³), which excludes latent heat. Condensing boilers recover that extra latent heat (880 kcal/m³), so efficiency is measured against Gross Calorific Value (GCV = 9480 kcal/Nm³).
Maximum efficiency: η = Recovered Total Heat / NCV × 100% = up to 110%
This is not "free energy" — it is simply counting heat that was always there but previously vented to the atmosphere.
Calorific Value Reference: Sensible heat per 1m³ natural gas: 31669 kJ/m³ | Latent heat: 3427 kJ/m³
Operating Conditions & System Design
Condensing boilers achieve maximum efficiency when the return water temperature is below 50°C, allowing flue gas to condense within the heat exchanger. In typical space heating applications, system design should account for this to ensure the boiler operates in condensing mode for the majority of its runtime.
Applications include domestic hot water preparation and space heating. Unlike a heat only boiler which requires a separate hot water cylinder, our combo boiler configuration integrates both functions in a single unit, saving space and installation cost. Both heat only and combo configurations are available depending on project requirements.
Belitto Condensing Boiler Series
TBLN Series (60–2800kW): Compact footprint, suitable for residential and light commercial applications. Equipped with high-efficiency Al-Mg-Si heat exchanger. All units deliver high efficiency condensing boiler performance with SEDBUK seasonal efficiency ratings among the highest in class.
TBYG Series (3500–7000kW): Designed for large-scale commercial and district heating applications. Compatible with cascade control systems for modular capacity scaling. Ultra-low NOx emission burners comply with stringent environmental standards.
Technical Specifications
TBLN Series - Condensing Gas Boiler (60-2800kW)
| Parameter | TBLN-60 | TBLN-90 | TBLN-120 | TBLN-200 | TBLN-240 | TBLN-280 | TBLN-350 | TBLN-420 | TBLN-550 | TBLN-700 | TBLN-1050 | TBLN-1400 | TBLN-2100 | TBLN-2800 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rated Heat Input (kW) | 60 | 90 | 120 | 200 | 240 | 280 | 350 | 420 | 550 | 700 | 1050 | 1400 | 2100 | 2800 |
| Heating Area (m²) | 600~900 | 900~1500 | 1500~2000 | 2800–4000 | 3400–4800 | 4000–5600 | 5000–7000 | 7000-8400 | 7800-11000 | 10000-15000 | 15000-21000 | 20000-28000 | 30000-42000 | 40000-56000 |
| Max Thermal Efficiency at 30% Load (%) | 108.9 | 108.9 | 108.9 | 108.9 | 108.9 | 108.9 | 108.9 | 108 | 108 | 108 | 108 | 108 | 108 | 108 |
| NOx Emission (mg/m³) | <30 | <30 | <30 | <30 | <30 | <30 | <30 | <30 | <30 | <30 | <30 | <30 | <30 | <30 |
| Max Gas Consumption (m³/h) | 5.9 | 9.1 | 12.4 | 20 | 24 | 28 | 35 | 42 | 55 | 70 | 10.5 | 137.2 | 205.8 | 274.4 |
| Dimensions L×W×H (mm) | 510×640×1050 | 510×640×1050 | 550×720×1120 | 1180×680×1260 | 1180×680×1260 | 1560×680×1260 | 1560×725×1570 | 1300×725×1570 | 1350×880×1700 | 1550×880×1710 | 1900×980×1710 | 2610×1000×1850 | 2650×1350×1900 | 3350×1400×2000 |
| Net Weight (kg) | 70 | 81 | 90 | 200 | 220 | 280 | 315 | 380 | 415 | 530 | 710 | 850 | 1100 | 1400 |
Product Gallery
TBLN Series condensing gas boiler
Service & Applications
Comprehensive support for all heating needs
Free Consulting
Professional design options and heating solutions tailored to your project requirements.
Installation Support
Guiding installation and commissioning to ensure optimal system performance.
Remote Monitoring
GPRS remote control via WeChat or APP. Real-time parameter checking and temperature adjustment.
Warranty Coverage
12 months from commissioning or 18 months from delivery, whichever comes first — applies to the complete unit and to all components alike.
Wide Application Scenarios: Houses, commercial buildings, industrial plants, hotels, agricultural greenhouses, and more.
Contact Us for Your ProjectCertifications & Compliance
Built on certified manufacturing and third-party verified quality.
Quality Management
Manufactured in ISO 9001-certified production facilities.
Product Conformity
Every unit ships with a factory test report and certificate of conformity.
Certified Components
Equipped with CE-certified components from Bekaert, Dungs, EBM, Siemens and SIT.
EAC Certification
Available on request.
Belitto products are engineered to Belitto specifications and manufactured by audited partners. Certificate copies are provided per shipment or project on request.
Frequently Asked Questions
Technical and commercial questions we receive most often.
What power range does the TBLN Series cover?
The TBLN Series covers 60kW to 2800kW across 14 models (TBLN-60 through TBLN-2800), suitable for heating areas from 600m² to 56,000m². This range makes it ideal for residential complexes, schools, and commercial buildings of varying sizes.
Do Belitto boilers use CE-certified components?
Yes — all Belitto condensing gas boilers are built with CE-certified components from Bekaert (Netherlands), Dungs (Germany), EBM, Siemens and SIT. Each unit also ships with a factory test report and a certificate of conformity.
What is the thermal efficiency of TBLN boilers?
TBLN Series boilers achieve up to 108.9% thermal efficiency at 30% load (for models TBLN-60 to TBLN-350) and 108% for larger models (TBLN-420 to TBLN-2800). This is measured against Gross Calorific Value (GCV), which includes latent heat recovered from condensing water vapor in the flue gas.
Are TBLN boilers suitable for commercial buildings?
Yes. The TBLN Series is specifically designed for commercial buildings, schools, residential complexes, and light commercial applications. The compact design saves approximately 37% floor space compared to conventional boilers, making it ideal for projects with limited installation space.
What is the delivery time for TBLN boilers?
Standard TBLN models (60-700kW) are typically available within 2-4 weeks. Larger models (1050-2800kW) may require 4-8 weeks depending on configuration. Contact our sales team for exact lead times based on your project requirements.
Quick Inquiry
Fill out the form below and we'll get back to you within 24 hours