Qingdao Haiang HVAC Equipment Co., Ltd.,

Qingdao Hiounce HVAC Equipment Co., Ltd., established in 1958, specializes in the R&D and manufacturing of gas-fired combination boilers, condensing boilers, and modular boilers—with an annual output of 120,000 units. In partnership with Italy’s Cosmo Group, the company is committed to delivering international-standard, high-quality, low-carbon, and environmentally friendly gas thermal energy equipment solutions.

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ZunYa III ZY-01

ZunYa III ZY-01

Plate-Heat-Exchanger Gas-Fired Combination Boiler

Featuring touch-sensitive controls for intuitive operation, this unit combines elegant aesthetics with practical functionality and exceptional build quality. Its high-conductivity copper heat exchanger delivers outstanding thermal efficiency, ensuring stable and reliable heat output for both residential space heating and domestic hot water supply.

Powered by an imported microcontroller chip and a precision digital microcomputer control system, the unit offers accurate, responsive, and dependable performance. The built-in programmable timer allows flexible scheduling to match actual usage patterns—helping reduce daily operating costs.

The intelligent fault-tolerant operation mode further improves system reliability and safety during abnormal conditions. Coupled with Hiounce’s proprietary energy-saving design, the unit achieves over 30% electricity savings—providing users with an efficient, stable, economical, and worry-free heating and hot water experience.

  • Touch-sensitive controls, elegant design, and superior build quality
  • High-efficiency copper heat exchanger
  • Imported microcontroller chip with digital microcomputer control system
  • Built-in timer function for optimized energy usage and cost savings
  • Intelligent fault-tolerant operation mode enhances reliability
  • Proprietary energy-saving design reduces electricity consumption by over 30%
Parameter LL1PB20-B LL1PB24-B LL1PB26-B LL1PB28-B LL1PB32-B LL1PB40-B
Configuration F1/F1+W F1/F1+W F1/F1+W F1/F1+W F1/F1+W F1/F1+W
Rated Input Power (kW) 20 24 26 28 32 40
Rated Output Power (kW) 18 21.6 23.5 25 28.8 36
Thermal Efficiency (%) ≥90 ≥90 ≥90 ≥90 ≥90 ≥90
Rated Voltage/Frequency/Power (V/Hz/W) 220/50/120 220/50/120 220/50/120 220/50/120 220/50/120 220/50/120
Gas Pressure (Pa) Manufactured Gas: 1000 Manufactured Gas: 1000 Natural Gas: 2000 Natural Gas: 2000 Liquefied Petroleum Gas (LPG): 2800 Liquefied Petroleum Gas (LPG): 2800
Heating Water Temperature Range (℃) 30–80 30–80 30–80 30–80 30–80 30–80
Domestic Hot Water Temperature Range (℃) 30–60 30–60 30–60 30–60 30–60 30–60
Rated Hot Water Flow Rate (Δt = 25 K) (kg/min) 8 9.5 10 11.5 13 16
Domestic Hot Water Operating Pressure (MPa) 0.02–0.8 0.02–0.8 0.02–0.8 0.02–0.8 0.02–0.8 0.02–0.8
Heating System Operating Pressure (MPa) 0.02–0.8 0.02–0.8 0.02–0.8 0.02–0.8 0.02–0.8 0.02–0.8
Heating System Maximum Pressure (MPa) 0.3 0.3 0.3 0.3 0.3 0.3
Dimensions H×W×D (mm) 710×410×245 710×410×245 740×410×315 740×410×315 740×410×330 740×510×330
Weight (kg) 30 33 33 37 38 41
Pipe Connection (G) Heating Supply: 3/4 Heating Return: 3/4 Heating Return: 3/4 Tap Water: 1/2 Domestic Hot Water: 1/2 Natural Gas: 3/4
Flue Diameter Φ (Concentric) (mm) Φ60/100 Φ60/100 Φ60/100 Φ60/100 Φ60/100 Φ60/100