Technical Parameters 

Parameter Range 

Description

Rated Thermal Power

0.7MW - 70MW (equivalent to 600,000 kcal/h - 12,000,000 kcal/h)

Small-sized units are suitable for commercial venues; units above 14MW can meet high-load demands such as centralized heating in residential areas and industrial process heating.

Operating Vacuum Degree

2 - 8kPa (absolute pressure)

Triggers vacuum pump pressure compensation or shutdown when below the threshold to prevent air from entering and affecting heat exchange efficiency; normal working pressure is mostly less than 0.7bar.

Thermal Efficiency

92% - 95% for conventional models, up to 103% for condensing models, and 105% - 107% for some imported models

Condensing models improve efficiency by recovering flue gas condensation heat, saving over 10% energy compared to ordinary models.

NOₓ Emission

≤30mg/Nm³ for conventional models, ≤15mg/Nm³ for ultra-low NOₓ models

Some models complying with environmental standards can achieve emissions as low as 28mg/Nm³, suitable for scenarios with strict environmental requirements.

User-Side Supply Water Temperature

40 - 60℃ for domestic hot water, 60 - 95℃ for heating

Some industrial models can reach an outlet water temperature of ≤110℃; temperature fluctuation is ≤±2℃, and ≤±0.5℃ for high-precision models.

Heat Transfer Fluid Temperature

40 - 90℃ under normal conditions; over-temperature alarm setpoint is mostly 98℃

The burner automatically shuts down and alarms when over-temperature occurs to avoid equipment damage.

Design Pressure

1.0MPa for conventional heat exchangers, 1.6 - 2.0MPa for pressure-resistant models

Although the unit operates under negative pressure, heat exchange components are designed according to pressure-bearing standards to ensure structural stability.

Operating Noise

≤65dB

Adopts silent fans and proportional combustion technology, suitable for noise-sensitive scenarios such as hospitals and office buildings.

Startup Heating Time

≤5 minutes

Tube bundle water-cooled furnace models heat up faster due to less heat transfer fluid volume.

Power Distribution

1.4kW - 75kW

Increases with the unit's power; for example, the power distribution of a 12,000,000 kcal/h model reaches 75kW, with a power supply of 380V/50Hz for most models.

Applicable Altitude

0 - 5000 meters

Some high-altitude adapted models can maintain 93% thermal efficiency at 3000 meters above sea level through adaptive combustion control.

Safety Protection Parameters

Burst pressure of explosion-proof valve diaphragm: 0.01MPa; over-pressure alarm setpoint: 5kPa

Equipped with multiple protections such as over-temperature, over-pressure, and abnormal water level; gas-fired models are equipped with gas leakage detection devices.