Premium Instant Boiler
KDNV-G2PHEX
KDNV-GP(P)
Premium Instant Boiler's Best Technology for Hot Water
- It stably supplies large volumes of hot water to large-scale facilities while meeting hot water demand without a storage tank. Fully proportional control and Korea’s first modular hot water boiler control system provide efficient operation across the entire load range. This tankless hot water system reduces the installation area by 70% compared with conventional hot water systems and lowers maintenance costs by eliminating hot water storage tanks. The indirect-heating boiler design is exempt from licensing and inspection requirements, reducing incidental costs such as inspection, water treatment, and chemical dosing. Our high-performance heat exchanger is designed for smooth hot water flow, preventing scale and foreign-material buildup and maintaining its initial efficiency for more than 10 years.
-
Tankless hot water supply system
(Tankless system) -
Compared with conventional hot water systems
70% less installation space -
No-license, no-inspection products reduce incidental
costs such as inspection and customs fees -
By simplifying auxiliary facilities
Reduced maintenance costs -
Korea’s highest efficiency: 93%
(Based on higher heating value) -
Specially designed high-performance heat exchanger provides
excellent resistance to scale buildup -
Fully proportional control operation
-
Hot water at an average temperature of 65℃ to 70℃ reduces Legionella concentration and the likelihood of exposure,
lowering the risk of infection
PREMIX BURNER
- Premixed Combustion
- No separate combustion chamber is required due to the surface combustion method.
- Fully proportional control operation (15:1)
- The premixed combustion method eliminates furnace explosions associated with forced-mixing systems.
- Ultra-low NOx emissions across the full load range (20 ppm or less)
Premix Burner Head Flame Configuration
BURNER - DIAGRAM
D-BRAIN (MODULAR SYSTEM)
-
Developed from 50 years of hot water boiler manufacturing expertise, Korea’s first D-BRAIN modular control system senses load flow and average flow temperatures and optimally controls the number of boilers in operation, helping reduce energy consumption.
(For installations of 3 or more boilers // up to 16 boilers)
STANDARD SPECIFICATIONS
| Category | Type | Unit | KDNV- 20G2MHEX |
KDNV- 23G2MHEX |
KDNV- 24G2MHEX |
KDNV- 25G2MHEX |
KDNV- 30G2MHEX |
KDNV- 31G2MHEX |
KDNV- 35G2MHEX |
KDNV- 37G2MHEX |
| Boiler Specifications |
Rated Heat Output |
MW | 0.23 | 0.28 | 0.28 | 0.29 | 0.35 | 0.36 | 0.41 | 0.43 |
| kcal/h | 200,000 | 237,000 | 240,800 | 250,000 | 300,000 | 307,000 | 350,000 | 370,000 | ||
| Efficiency | % | 99% or Higher (Based on Lower Heating Value) | ||||||||
| Heat Transfer Area |
m² | 7.1 | 7.1 | 7.1 | 7.1 | 7.1 | 8.0 | 8.0 | 8.0 | |
| Burner | - | DP2 | DP3 | |||||||
| Burner Capacity |
kcal/h |
60,000 ~ 300,000 |
90,000 ~ 450,000 | |||||||
| Control Method |
- | Inverter Proportional Control | ||||||||
| Blower Capacity |
kW | 1.2 | ||||||||
| Total Power Consumption |
kW | 1.3 | ||||||||
| Power Supply | V | 220V x 1ø | ||||||||
| Product Weight |
kg | 1,100 | 1,110 | 1,120 | 1,120 | 1,130 | 1,210 | 1,220 | 1,230 | |
| Fuel Consumption |
LNG | N㎥/h | 20.2 | 23.9 | 24.3 | 25.3 | 30.3 | 31.0 | 35.4 | 37.4 |
| Propane (LPG) | N㎥/h | 9.0 | 10.7 | 10.9 | 11.3 | 13.5 | 13.8 | 15.8 | 16.7 | |
| Connection Size |
Gas Inlet | A | 25 | 40 | ||||||
| Flue | ømm | 200 | 200 | 200 | 200 | 250 | 250 | 250 | 250 | |
| Overall Dimensions |
Width (W) | mm | 1,050 | 1,050 | 1,050 | 1,050 | 1,050 | 1,050 | 1,050 | 1,050 |
| Length (L) | 2,250 | 2,650 | 2,650 | 2,650 | 2,690 | 2,870 | 2,870 | 2,900 | ||
| Height (H) | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | ||
Heating & Hot Water Circulation (333K → 343K) {60℃ → 70℃}
| Category | Type | Unit | KDNV- 20G2MHEX |
KDNV- 23G2MHEX |
KDNV- 24G2MHEX |
KDNV- 25G2MHEX |
KDNV- 30G2MHEX |
KDNV- 31G2MHEX |
KDNV- 35G2MHEX |
KDNV- 37G2MHEX |
|
Heating and Hot Water Circulation |
Rated Heat Output |
MW | 0.23 | 0.28 | 0.28 | 0.29 | 0.35 | 0.36 | 0.41 | 0.43 |
| kcal/h | 200,000 | 237,000 | 240,800 | 250,000 | 300,000 | 307,000 | 350,000 | 370,000 | ||
| Circulation Flow Rate |
ℓ | 20,000 | 23,700 | 24,080 | 25,000 | 30,000 | 30,700 | 35,000 | 37,000 | |
| Max. Working Pressure |
MPa{kgf/cm²} | 1{10} | ||||||||
| Head Loss | MPa{mH₂O} | 0.015{1.5} | 0.021{2.1} | 0.021{2.1} | 0.023{2.3} | 0.02{2.0} | 0.021{2.1} | 0.027{2.7} | 0.03{3.0} | |
| Material | - | Stainless Steel Pipe | ||||||||
| Connection Size |
A | 50 | 50 | 50 | 50 | 65 | 65 | 65 | 65 | |
Heating & Hot Water Circulation (333K → 343K) {50℃ → 70℃}
| Category | Type | Unit | KDNV- 20G2MHEX |
KDNV- 23G2MHEX |
KDNV- 24G2MHEX |
KDNV- 25G2MHEX |
KDNV- 30G2MHEX |
KDNV- 31G2MHEX |
KDNV- 35G2MHEX |
KDNV- 37G2MHEX |
| Hot Water Supply |
Rated Heat Output |
MW | 0.23 | 0.28 | 0.28 | 0.29 | 0.35 | 0.36 | 0.41 | 0.43 |
| kcal/h | 200,000 | 237,000 | 240,800 | 250,000 | 300,000 | 307,000 | 350,000 | 370,000 | ||
| Circulation Flow Rate |
ℓ | 10,000 | 11,850 | 12,040 | 12,500 | 15,000 | 15,350 | 17,500 | 18,500 | |
| Max. Working Pressure |
MPa{kgf/cm²} | 1{10} | ||||||||
| Head Loss | MPa{mH₂O} | 0.004{0.4} | 0.005{0.5} | 0.005{0.5} | 0.006{0.6} | 0.005{0.5} | 0.005{0.5} | 0.007{0.7} | 0.008{0.8} | |
| Material | - | Stainless Steel Pipe | ||||||||
| Connection Size |
A | 50 | 50 | 50 | 50 | 65 | 65 | 65 | 65 | |
Hot Water Supply (298K → 338K) {25℃ → 65℃}
| Category | Type | Unit | KDNV- 20G2MHEX |
KDNV- 23G2MHEX |
KDNV- 24G2MHEX |
KDNV- 25G2MHEX |
KDNV- 30G2MHEX |
KDNV- 31G2MHEX |
KDNV- 35G2MHEX |
KDNV- 37G2MHEX |
| Hot Water Supply |
Rated Heat Output |
MW | 0.23 | 0.28 | 0.28 | 0.29 | 0.35 | 0.36 | 0.41 | 0.43 |
| kcal/h | 200,000 | 237,000 | 240,800 | 250,000 | 300,000 | 307,000 | 350,000 | 370,000 | ||
| Circulation Flow Rate |
ℓ | 3,333 | 5,925 | 6,020 | 4,167 | 5,000 | 5,117 | 5,833 | 6,167 | |
| Max. Working Pressure |
MPa{kgf/cm²} | 1{10} | ||||||||
| Head Loss | MPa{mH₂O} | 0.001{0.1} | 0.001{0.1} | 0.001{0.1} | 0.001{0.1} | 0.001{0.1} | 0.001{0.1} | 0.001{0.1} | 0.001{0.1} | |
| Material | - | Stainless Steel Pipe | ||||||||
| Connection Size |
A | 40 | 40 | 40 | 40 | 50 | 50 | 50 | 50 | |
-
The above specification table is presented as follows.
- The fuel heating values used to calculate fuel consumption are based on the following.
- Fuel: Higher Heating Value_Lower Heating Value
- LNG : 11,000_10,000 kcal/Nm³
- Propane: 24,350_22,400 kcal/Nm³ - Design flow temperature condition for heating and hot water circulation: 333~343K{60~70℃}
- Design flow temperature condition for hot water supply: 298~338K{25~65℃}, 278~338K{5~65℃}
- The rated heat outputs for heating and hot water supply apply when each function is used independently. When used simultaneously, their combined output equals the boiler heat output.
-
The following tolerances account for measurement errors from instruments and operators.
- Boiler efficiency measurement error: ±1%; fuel quantity (heat input) measurement error: ±1.5% - The boiler efficiency stated above is based on the lower heating value.
- The specifications above are subject to change without notice.
STANDARD SPECIFICATIONS
| Category | Type | Unit | KDNV- 40G2MHEX |
KDNV- 42G2MHEX |
KDNV- 43G2MHEX |
KDNV- 45G2MHEX |
KDNV- 50G2MHEX |
KDNV- 60G2MHEX |
| Boiler Specifications |
Rated Heat Output |
MW | 0.47 | 0.49 | 0.50 | 0.52 | 0.58 | 0.70 |
| kcal/h | 400,000 | 420,000 | 430,000 | 450,000 | 500,000 | 600,000 | ||
| Efficiency | % | 99% or Higher (Based on Lower Heating Value) | ||||||
| Heat Transfer Area |
m² | 8.0 | 8.0 | 8.0 | 8.0 | 8.0 | 11.1 | |
| Burner | - | DP5 | ||||||
| Burner Capacity |
kcal/h | 140,000 ~ 700,000 | ||||||
| Control Method |
- | Inverter Proportional Control | ||||||
| Blower Capacity |
kW | 1.8 | ||||||
| Total Power Consumption |
kW | 1.9 | ||||||
| Power Supply | V | 220V x 1ø | ||||||
| Product Weight |
kg | 1,240 | 1,250 | 1,260 | 1,270 | 1,280 | 1,700 | |
| Fuel Consumption |
LNG | N㎥/h | 40.4 | 42.4 | 43.4 | 45.5 | 50.5 | 60.6 |
| Propane (LPG) | N㎥/h | 18.0 | 18.9 | 19.4 | 20.3 | 22.5 | 27.1 | |
| Connection Size |
Gas Inlet | A | 40 | |||||
| Flue | ømm | 250 | 250 | 250 | 250 | 300 | 300 | |
| Overall Dimensions |
Width (W) | mm | 1,050 | 1,050 | 1,050 | 1,050 | 1,050 | 1,050 |
| Length (L) | 2,900 | 2,900 | 2,900 | 2,900 | 2,960 | 3,430 | ||
| Height (H) | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | ||
Heating & Hot Water Circulation (333K → 343K) {60℃ → 70℃}
| Category | Type | Unit | KDNV- 40G2MHEX |
KDNV- 42G2MHEX |
KDNV- 43G2MHEX |
KDNV- 45G2MHEX |
KDNV- 50G2MHEX |
KDNV- 60G2MHEX |
|
Heating and Hot Water Circulation |
Rated Heat Output |
MW | 0.47 | 0.49 | 0.50 | 0.52 | 0.58 | 0.70 |
| kcal/h | 400,000 | 420,000 | 430,000 | 450,000 | 500,000 | 600,000 | ||
| Circulation Flow Rate |
ℓ | 40,000 | 42,000 | 43,000 | 45,000 | 50,000 | 60,000 | |
| Max. Working Pressure |
MPa{kgf/cm²} | 1{10} | ||||||
| Head Loss | MPa{mH₂O} | 0.035{3.5} | 0.039{3.9} | 0.041{4.1} | 0.029{2.9} | 0.036{3.6} | 0.052{5.2} | |
| Material | - | Stainless Steel Pipe | ||||||
| Connection Size |
A | 65 | 65 | 65 | 80 | 80 | 80 | |
Heating & Hot Water Circulation (333K → 343K) {50℃ → 70℃}
| Category | Type | Unit | KDNV- 40G2MHEX |
KDNV- 42G2MHEX |
KDNV- 43G2MHEX |
KDNV- 45G2MHEX |
KDNV- 50G2MHEX |
KDNV- 60G2MHEX |
| Hot Water Supply |
Rated Heat Output |
MW | 0.47 | 0.49 | 0.50 | 0.52 | 0.58 | 0.70 |
| kcal/h | 400,000 | 420,000 | 430,000 | 450,000 | 500,000 | 600,000 | ||
| Circulation Flow Rate |
ℓ | 20,000 | 21,000 | 21,500 | 22,500 | 25,000 | 30,000 | |
| Max. Working Pressure |
MPa{kgf/cm²} | 1{10} | ||||||
| Head Loss | MPa{mH₂O} | 0.009{0.9} | 0.01{1.0} | 0.01{1.0} | 0.007{0.7} | 0.009{0.9} | 0.013{1.3} | |
| Material | - | Stainless Steel Pipe | ||||||
| Connection Size |
A | 65 | 65 | 65 | 80 | 80 | 80 | |
Hot Water Supply (298K → 338K) {25℃ → 65℃}
| Category | Type | Unit | KDNV- 40G2MHEX |
KDNV- 42G2MHEX |
KDNV- 43G2MHEX |
KDNV- 45G2MHEX |
KDNV- 50G2MHEX |
KDNV- 60G2MHEX |
| Hot Water Supply |
Rated Heat Output |
MW | 0.47 | 0.49 | 0.50 | 0.52 | 0.58 | 0.70 |
| kcal/h | 400,000 | 420,000 | 430,000 | 450,000 | 500,000 | 600,000 | ||
| Circulation Flow Rate |
ℓ | 6,667 | 7,000 | 7,167 | 7,500 | 8,333 | 10,000 | |
| Max. Working Pressure |
MPa{kgf/cm²} | 1{10} | ||||||
| Head Loss | MPa{mH₂O} | 0.002{0.2} | 0.002{0.2} | 0.002{0.2} | 0.001{0.1} | 0.002{0.2} | 0.002{0.2} | |
| Material | - | Stainless Steel Pipe | ||||||
| Connection Size |
A | 50 | 50 | 50 | 65 | 65 | 65 | |
-
The above specification table is presented as follows.
- The fuel heating values used to calculate fuel consumption are based on the following.
- Fuel: Higher Heating Value_Lower Heating Value
- LNG : 11,000_10,000 kcal/Nm³
- Propane: 24,350_22,400 kcal/Nm³ - Design flow temperature condition for heating and hot water circulation: 333~343K{60~70℃}
- Design flow temperature condition for hot water supply: 298~338K{25~65℃}, 278~338K{5~65℃}
- The rated heat outputs for heating and hot water supply apply when each function is used independently. When used simultaneously, their combined output equals the boiler heat output.
-
The following tolerances account for measurement errors from instruments and operators.
- Boiler efficiency measurement error: ±1%; fuel quantity (heat input) measurement error: ±1.5% - The boiler efficiency stated above is based on the lower heating value.
- The specifications above are subject to change without notice.
STANDARD SPECIFICATIONS
| Category | Type | Unit | KDNV- 70G2MHEX |
KDNV- 75G2MHEX |
KDNV- 80G2MHEXS |
KDNV- 80G2MHEX |
KDNV- 100G2MHEX |
| Boiler Specifications |
Rated Heat Output |
MW | 0.81 | 0.87 | 0.93 | 0.93 | 1.16 |
| kcal/h | 700,000 | 750,000 | 800,000 | 800,000 | 1,000,000 | ||
| Efficiency | % | 99% or Higher (Based on Lower Heating Value) | |||||
| Heat Transfer Area |
m² | 11.1 | 11.1 | 11.1 | 16.1 | 17.4 | |
| Burner | - | DP8 | DP10 | ||||
| Burner Capacity |
kcal/h | 200,000 ~ 1,000,000 |
250,000 ~ 1,250,000 |
||||
| Control Method |
- | Inverter Proportional Control | |||||
| Blower Capacity |
kW | 2.9 | 3.6 | ||||
| Total Power Consumption |
kW | 3.0 | 3.7 | ||||
| Power Supply | V | 380V x 3ø | |||||
| Product Weight |
kg | 1,710 | 1,720 | 1,750 | 1,900 | 2,050 | |
| Fuel Consumption |
LNG | N㎥/h | 70.7 | 75.8 | 80.8 | 80.8 | 101.0 |
| Propane (LPG) | N㎥/h | 31.6 | 33.8 | 36.1 | 36.1 | 45.1 | |
| Connection Size |
Gas Inlet | A | 50 | 50 | |||
| Flue | ømm | 300 | 300 | 350 | 350 | 350 | |
| Overall Dimensions |
Width (W) | mm | 1,050 | 950 | 950 | 1,240 | 1,240 |
| Length (L) | 3,480 | 3,640 | 3,640 | 3,640 | 3,740 | ||
| Height (H) | 1,780 | 1,780 | 1,780 | 1,590 | 1,590 | ||
Heating & Hot Water Circulation (333K → 343K) {60℃ → 70℃}
| Category | Type | Unit | KDNV- 70G2MHEX |
KDNV- 75G2MHEX |
KDNV- 80G2MHEXS |
KDNV- 80G2MHEX |
KDNV- 100G2MHEX |
|
Heating and Hot Water Circulation |
Rated Heat Output |
MW | 0.81 | 0.87 | 0.93 | 0.93 | 1.16 |
| kcal/h | 700,000 | 750,000 | 800,000 | 800,000 | 1,000,000 | ||
| Circulation Flow Rate |
ℓ | 70,000 | 75,000 | 80,000 | 80,000 | 100,000 | |
| Max. Working Pressure |
MPa{kgf/cm²} | 1{10} | |||||
| Head Loss | MPa{mH₂O} | 0.045{4.5} | 0.052{5.2} | 0.059{5.9} | 0.059{5.9} | 0.093{9.3} | |
| Material | - | Stainless Steel Pipe | |||||
| Connection Size |
A | 100 | 100 | 100 | 100 | 100 | |
Heating & Hot Water Circulation (333K → 343K) {50℃ → 70℃}
| Category | Type | Unit | KDNV- 70G2MHEX |
KDNV- 75G2MHEX |
KDNV- 80G2MHEXS |
KDNV- 80G2MHEX |
KDNV- 100G2MHEX |
| Hot Water Supply |
Rated Heat Output |
MW | 0.81 | 0.87 | 0.93 | 0.93 | 1.16 |
| kcal/h | 700,000 | 750,000 | 800,000 | 800,000 | 1,000,000 | ||
| Circulation Flow Rate |
ℓ | 35,000 | 37,500 | 40,000 | 40,000 | 50,000 | |
| Max. Working Pressure |
MPa{kgf/cm²} | 1{10} | |||||
| Head Loss | MPa{mH₂O} | 0.011{1.1} | 0.013{1.3} | 0.015{1.5} | 0.015{1.5} | 0.023{2.3} | |
| Material | - | Stainless Steel Pipe | |||||
| Connection Size |
A | 100 | 100 | 100 | 100 | 100 | |
Hot Water Supply (298K → 338K) {25℃ → 65℃}
| Category | Type | Unit | KDNV- 70G2MHEX |
KDNV- 75G2MHEX |
KDNV- 80G2MHEXS |
KDNV- 80G2MHEX |
KDNV- 100G2MHEX |
| Hot Water Supply |
Rated Heat Output |
MW | 0.81 | 0.87 | 0.93 | 0.93 | 1.16 |
| kcal/h | 700,000 | 750,000 | 800,000 | 800,000 | 1,000,000 | ||
| Circulation Flow Rate |
ℓ | 11,667 | 12,500 | 13,333 | 13,333 | 16,667 | |
| Max. Working Pressure |
MPa{kgf/cm²} | 1{10} | |||||
| Head Loss | MPa{mH₂O} | 0.002{0.2} | 0.002{0.2} | 0.003{0.3} | 0.003{0.3} | 0.004{0.4} | |
| Material | - | Stainless Steel Pipe | |||||
| Connection Size |
A | 80 | 80 | 80 | 80 | 80 | |
-
The above specification table is presented as follows.
- The fuel heating values used to calculate fuel consumption are based on the following.
- Fuel: Higher Heating Value_Lower Heating Value
- LNG : 11,000_10,000 kcal/Nm³
- Propane: 24,350_22,400 kcal/Nm³ - Design flow temperature condition for heating and hot water circulation: 333~343K{60~70℃}
- Design flow temperature condition for hot water supply: 298~338K{25~65℃}
- The rated heat outputs for heating and hot water supply apply when each function is used independently. When used simultaneously, their combined output equals the boiler heat output.
-
The following tolerances account for measurement errors from instruments and operators.
- Boiler efficiency measurement error: ±1%; fuel quantity (heat input) measurement error: ±1.5% - The boiler efficiency stated above is based on the lower heating value.
- The specifications above are subject to change without notice.