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Home Wall-hung Combination Boiler Wall Mount Gas Boilers for Hydronic Heating System HWB-A12

Wall Mount Gas Boilers for Hydronic Heating System HWB-A12

Model HWB-A12 wall boiler is an endurable and compact gas boiler supplying hot water for space heating and domestic hot water in one unit with efficiency above 90%.  Installed indoor, it is rather safe thanks to its sealed combustion system not taking air in the room and exhaust gas is forced out of the house by a built-in blower.

Available in 4 output size18kW,  24kW,28kW,32kW, and comes with two versions, bithermal version and double heat exchangers version.

  • Item NO.:

    HWB-A12
  • Payment:

    T/T, LC at sight
  • Product Origin:

    China
  • Color:

    White
  • Shipping Port:

    Zhongshan, Guangzhou
  • Order(MOQ):

    1
  • Product weight:

    32.800~38.5kg
  • Product Detail

FACTS AND BENEFITS

  • Sealed combustion chamber and forced draught, no impact upon indoor air quality. 
  • Domestic hot water priority. 28kW model produces up to 14 l/min of domestic hot water at a 25℃ rise
  • All versions are available as NG or LP.
  • Expansion vessel and modulating high efficiency pump as standard
  • Two levels of frost protection offers flexibility for location of installation.
  • Stepless proportional gas valve paired with water flow stablizer, effectively control water temperature fluctuation resulted from unstable water pressure.
  • High efficient combustion chamber, effective thermal insulator, superior heat exchanger combined to render remarkable insulation and heat transfer. This is not only fuel saving but keeps down surface temperature of adjacent components, thus largely prolongs lifespan of boiler.
  • Blackout memory capable. Once power restored, the unit gets back to the state before power failure to ensure boiler proper operation. 


TECHNICAL DATA

Model HWB-A12-18P
HWB-A12-18D
HWB-A12-24P
HWB-A12-24D
HWB-A12-28P
HWB-A12-28D
HWB-A12-32P
HWB-A12-32D
Fuel Type Natural gas /LPG /Town gas
Rated gas pressure(Pa) 2000(Natural gas) /2800(LPG) /1000(Town gas)
Rated heat load(kW) 18 24 28 32
Heat efficiencty at rated heat load ≧90% ≧90% ≧90% ≧90%
Power supply AC220-50Hz AC220-50Hz AC220-50Hz AC220-50Hz
Rated electric power (W) 110 110 120 120
Water proof protection IPX4 IPX4 IPX4 IPX4
Central Heating
Rated output capacity (kW) 16.2 21.6 25.2 28.8
Water temperature range (℃) Radiator: 30-80; Underfloor heating: 30-60
Heating area (sq.M) 50-120 80-180 120-220 160-260
Water pump lift(m) 5 5 6 6
Water pressure for heating system (MPa) 0.1-0.3 0.1-0.3 0.1-0.3 0.1-0.3
Expansion tank volume (L) 6 6 6 6
Expansion tank preload (MPa) 0.1 0.1 0.1 0.1
Heating system circuit  Sealed and forced
Domestic Hot Water
Flow rate △T=25℃(kg/min) 9 12 14 16
Flow rate △T=30℃(kg/min) 7.5 10 11.7 13.7
DHW temperature range(℃) 30-60
Applicable water pressure(MPa) 0.03-0.8 0.03-0.8 0.03-0.8 0.03-0.8
Min.Startup flow rate(L/min) 2.5 2.5 2.5 2.5
Min.turnoff flow rate(L/min) 2 2 2 2
Connector heating/gas inlet: G3/4; DHW connector: G1/2
Flue spec (mm) Coxial double pipes Φ60-Φ100
Flue pipe length (m) 1 1 1 1
Net weight (kg) 32.8 33 35 35
Normal working noise (dB) <45 <45 <45 <45
Exhaust type Balanced forced draught
Ignition Pulse automatic ignition
Temperature control method Gas proportional modulating
Dimension (mm) 740*410*310 740*410*310 740*410*310 740*410*310

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