Warmhaus Enerwa Combi Boiler

Enerwa Condensing Combi Boiler

Enerwa Condensing Combi Boiler
Dimensions Dimensions
725 x 420 x 288 mm.
Capacity Capacity
24 kW, 28 kW and 33 kW
Control Panel Control Panel
Rotary and Button-Control Panel
Sound Level Sound Level
50 dB / 52 dB / 54 dB
Modulation Rate Modulation Rate
High savings with 1:10 modulation
Efficiency Efficiency
Up to 97.5% high efficiency

With its compact dimensions, (measuring just 288 mm in depth), the Enerwa ensures both safety and comfort with the "Smart Gas" technology while also promoting efficient combustion

  • High efficiency with long-lasting stainless steel heat exchanger
  • Continuous on-demand hot water with pre-heat
  • Seamless spare parts support
  • Custom Design Metal Front Panel
  • Compliant with EU ErP Directive
  • Durable front surface with polymer glass finish
  • Hot water comfort with high flow rate
  • Lowest NOx Emissions in Exhaust Gas (Class 6)
  • High level of insulation and low heat loss
  • Compatible with both Natural Gas (NG) and Liquefied Petroleum Gas (LPG) without the need for part replacement for LPG.
  • ErP Compliant Frequency-Controlled Pump
TECHNICAL DATA UNIT Enerwa 24/31          Enerwa Plus 24/31 Enerwa 28/35               Enerwa Plus 28/35 Enerwa 33/39           Enerwa Plus 33/39 Enerwa Plus 42/40 Enerwa Plus 45/43
Gas Circuit / Gas Type   NG / G20 LPG / G31 NG / G20 LPG / G31 NG / G20 LPG / G31 NG / G20 LPG / G31 NG / G20 LPG / G31
Gas Supply Pressure mbar 20 37 20 37 20 37 20 37 20 37
Gas Consumption at Minimum / Maximum m³/h 0.37 / 2.38 0.11 / 0.92 0.40 / 3.05 0.14 / 1.18 0.43 / 3.40 0.17 / 1.3 0.7 / 4.0 0.3 / 1.6 0.7 / 4.2 0.3 / 1.7
Seasonal Space Heating Energy Class / Efficiency (ŋs) % A / 92 A / 92 A / 92 A / 92 A / 91 A / 92 A / 91
Useful efficiency at rated heat output and high temperature regime(2) (ŋ4) % 87,6 87,7 88,0 88,6 88,2 88,0 87,4 87,4 87,4 87,4
Useful efficiency at 30% of rated heat output and low temperature regime(1)  (ŋ1) % 97,5 97,7 96,8 96,9 96,9 96,6 96,6 96,6 96,6 96,6
Radiator Circuit / Temperature Selection Range High / Low °C 25 - 80    /     25 - 47
Useful heat output at rated heat output and high temperature regime (2)  (P4) kW 23,7 23,7 28 28 33,02 33,02 38,2 38,2 41,4 41,3
Useful heat output at 30% of rated heat output and low temperature regime (1)  (P1) kW 4,34 4,4 4,97 4,85 5,72 6,09 7,91 7,91 7,91 7,91
(50/30 °C) Efficiency at Minimum / Maximum Heat Output Pn kW 3.6 / 25 2.9 / 25 3.9 / 30 3.9 / 30 3.6 / 35.5 2.9 / 25 7.6 / 42 7.5 / 42 7.6 / 45 7.5 / 44
Operating Pressure (Minimum / Maksimum) bar 0.5 / 3
Expansion Vessel liter 8 10 10 12 12
Maximum Pump Pressure (Q = 0 m³/h) mH2O 6,2 7,6 7,6 7,6 8
Maximum Pump Flow Rate l/h 2300 (H = 0.8 mH2O) 2500 (H = 0.4 mH2O) 2500 (H = 0.4 mH2O) 2300 (H = 0.4 mH2O) 2800 (H = 0.8 mH2O)
Domestic Hot Water Circuit / Temperature Adjustment Range °C 35 - 60
Water Heating Energy Efficiency Class / Declared Load Profile   A / L A / XL A / XL A / XL A / XL A / XXL A / XL A / XL A / XL A / XL
Water Heating Energy Efficiency % 81 84 83 84 82 81 81
Maximum DHW Heat Input (Minimum / Maximum) kW 3.5 / 31.2 3.75 / 35 4.35 / 38.8 7.2 / 39.5 7.2 / 42.5
Modulation Range   1/10 (11% - %100) 1/10 (11% - %100) 1/10 (11% - %100) 1/5 (18% - %100) 1/6 (17% - %100)
Domestic Hot Water flow rate (Δt: 30 °C) (Minimum / Maximum) l/min 1.5 / 15 1.5 / 17 1.5 / 19 1.5 / 18 1.5 / 20
DHW Water Pressure (Minimum / Maximum) bar 0.5 / 10
Electricity Circuit / Electricity Supply / Protection Index   [230 V +%10; -%15]  /  IP X 5D
Electricity Consumption (Min./Max.) Watt 95 / 55 104 / 60 115 / 65 149 / 90 154 / 90
Exhaust Gas Circuit   NG LPG NG LPG NG LPG NG LPG NG LPG
(80/60 °C) Exhaust gas temperature (Minimum / Maximum) °C 69 / 71 60 / 70 61/ 66 58 / 65 57 / 62 58 / 67 60 / 65 54 / 66 61 / 66 55 / 67
(50/30 °C) Exhaust gas temperature (Minimum / Maximum) °C 49 / 51 47 / 51 45 / 45 43 / 45 47 / 44 49 / 49 34 / 42 34 / 43 35 / 43 35 / 44
Weighted Value of NOX (GCV) / NOX Class: 6 mg/kWh 20 31 41 49 34 53 25 50 27 53
Maximum Flue Lenght (Ø60/100 mm) [Horizontal* / (Vertical*] m 10 / 11 10 / 11 10 / 11 10 / 11 10 / 11
Type   C13. C33. C53. C63. C83. C93. C103. B23. B23P. B33 C13. C33. C43. C53. C63. C83. B23. B23P
General / Dimensions H x W X D mm 725 x 420 x 288 [Volume < 87.7 Liter] 725 x 420 x 385 [Volume < 117.2 Liter]
Sound Level dB (A) 52 54 50 58 58
Net Weight / Packed Device Weight kg 33.5 / 34.7 34.7 / 35.9 35.5 / 36.7 37.5 / 39.5 38 / 40
(1) Low temperature means for condensing boilers 30 °C, for low temperature boilers 37 °C and for other heaters 50 °C return temperature (at heater inlet).
(2) High temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
(*) At the maximum flue distance, the flue length should be reduced by 1 meter for every 90° bend and 0.5 meter for every 45° bend.

Superior Features of Warmhaus

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High Safety with Gas Adaptive Technology

The Gas Adaptive Technology automatically detects gas quality and prevents improper combustion, ensuring safety. Proper combustion maximizes energy efficiency, utilizing the full potential of the gas.

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Long-Lasting Use with Stainless Steel Heat Exchanger

The use of wide-channel, seamless, single-coil stainless steel domestic hot water heat exchangers ensures a long lifespan.

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High Savings with 1:10 Modulation

With a wide modulation range of 1:10, it can reduce its power down to 3kW, allowing you to adjust its capacity according to your needs and saving both gas and electricity.

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Continuous On-Demand Hot Water with Pre-Heat

By selecting the pre-heating parameter in your combi, the waiting time for hot water usage is minimized.

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Hot Water Comfort with Dual Taps

With a hot water capacity of up to 15 liters per minute, it allows you to simultaneously use hot water from two taps.

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Corrosion-Resistant Brass Hydroblock

Featuring brass and composite components that are resistant to thermal stresses and corrosion, ensuring a long lifespan and years of trouble-free use.

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Smart Digital Display

Illuminated, large information screen that allows for control of heating, hot water, pressure, and adjustments.

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Quiet Operation

Operates very quietly thanks to high level of insulation.

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Compliance with ErP Directive for Lowest NOx Emissions in Exhaust Gas

Achieving the best class level, which is level 6, for NOx as stipulated by the ErP Directive, helps reduce air pollution by lowering harmful NOx emissions.

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High Protection System

High Protection System/bypass circuit and prevents the pump from overworking

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