Condensing Gas Combi Boiler

Different from conventional gas boilers that only utilize sensible heat, this China Condensing Gas Combi Boiler by Baedin supplier adopts a full heat recovery design based on net calorific value standards. It reclaims latent heat from water vapor in exhaust flue gas via dual-stage heat exchange, reusing residual heat generated during combustion to break the 100% thermal efficiency threshold.
Return water temperature is the core factor affecting condensing performance. To maintain optimal energy efficiency, the system return water temperature must stay below the 50°C dew point. The optional outdoor temperature sensor enables weather compensation control, stabilizing low return water temperature for continuous high-efficiency operation throughout the year.

Application Range & Core Product Strengths

This all-in-one gas combi boiler is fully compatible with two mainstream heating terminals: low-temperature underfloor heating and traditional panel radiators. When paired with underfloor heating systems, its energy-saving advantage is maximized, reducing natural gas consumption by up to 30%. It stands out with three core strengths: full condensing heat recovery, constant-temperature hot water output, and wide-range adjustable heating power.
As an eco-friendly heating device meeting China’s low-carbon emission regulations, it greatly reduces exhaust heat waste. It cuts NOx emissions by 80% and CO emissions by 90%, minimizing atmospheric pollution. Developed in line with national dual-carbon goals, this boiler helps end users reduce carbon output while achieving comfortable and low-cost heating.

Performance Features & Structural Advantages

Following German industrial standards and assembled with premium imported core parts, this combi boiler integrates heating and hot water supply in one compact unit. Six power specifications (20KW–40KW) cover apartments, villas and small commercial spaces. 32KW/36KW/40KW variants are standardly fitted with dual circulation pumps for higher water flow and balanced heat distribution.
Equipped with full premixed combustion system and dual heat exchanger structure, it achieves a peak efficiency of 109%, lowering annual operating costs by 15%–30%. The built-in DC variable frequency module prevents frequent startup/shutdown in transitional seasons, realizing intelligent gas and power saving without comfort loss.
Thanks to high-precision multi-point temperature sensing, stable hot water is available in 17±2 seconds with fluctuation controlled within 0.5°C. The optimized internal heating structure delivers instant, consistent hot water to meet daily bathing and domestic usage demands.
The unit adopts 800°C heat-resistant tempered glass panel, featuring scratch resistance, elegant appearance and easy daily cleaning. A 19cm×17.5cm large backlit LED screen intuitively displays real-time data and fault codes. An optional variable-speed circulating pump adapts to complex pipe systems, while connection to external hot water tanks supports high-demand scenarios for large villas.

Imported Core Parts & Complete Configuration

High-grade imported components ensure long-term reliability and stable performance, including: Italian primary heat exchanger, durable ceramic fiber burner, DC variable-frequency premixed fan, and premium Italian SIT gas control valve.
Complete standard configurations: patented external air filter, memory alloy water channel assembly, stainless steel secondary plate heat exchanger, heating expansion tank, optional tempered glass/metal panel, pressure gauge and water pressure transducer, 3-bar safety relief valve, manual drain valve, and water level sensing sealing components.

Technical Specifications