AIWA EVI H Outdoor

Compact air-water heat pump with or without capacity regulation for indoor or outdoor installation

Compact outside or inside installed air-water heat pump. Versions designated "i" are equipped with an integrated capacity control. Depending on the type of maximum flow temperature of up to 65 ° C. Compact design, integrated control cabinet with control.

Closed cooling circuit with Copeland Scroll compressor and heat exchangers. When capacity control variants with build in frequency inverters. Wide application possibilities of heating and cooling of houses and water heaters. Active cooling is reversible standard possible. Easy installation without complicated wiring and installation of refrigeration. Optimized for low temperature heating systems not only in new construction but also for heating systems with mid temperature flow after renovations.

Frame construction with solid base plate on adjustable feet. Epoxy-coated panel of the base unit. With weather-compensated, digital heat pump control. To control a heating circuit with mixer and one heating circuit without mixer.

Plain text user guidance with function-dependent menu levels, information texts and states in plain text. Diagnostic system with history storage and output state indication. Outdoor temperature sensor, hot gas sensor, liquid refrigerant sensor, heat pump flow temperature sensor and return temperature sensor, as well as source-flow sensor, source return sensor and DHW sensor included.

Optionally available with ModBus module as well WebControl control and monitoring via the Internet.


Heat pump type AiWa 18 EVI H Out AiWa 23 EVI H Out AiWa 23 EVI H-Twin Out
Article nr. WA0e1355 WA0e1356 WA0e1357
Refrigerant R410a R410A R410A
Heating capacity [ kW ]
A2/W35 18.5 23.50 22.10
A7/W35 21.58 27.42 25.78
A-2/W35 17.12 21.75 20.45
A2/W55 18.85 23.95 22.52
Input [ kW ]
A2/W35 4.4 5.36 5.02
Performance COP
A2/W35 4.2 4.3 4.4
Parameter of heat rejection
Maximal flow temperature [ ºC ] +65°C +65°C +65°C
Minimal flow temperature [ ºC ] +12°C +12°C +12°C
Flow nominal [ m3/h ] 3.21 4.07 1.92 ~ 3.83
Pressure drop ( max. ) [ kPa ] 15 14 13
∆T recommended [ K ] 5 5 5
Connection port size [ " ] 1.1/4" 1.1/4" 1.1/4"
Parameter of low potential heat source ( source )
Minimal source temperature [ ºC ] -25°C -25°C -25°C
Maximal source temperature [ ºC ] +40°C +40°C +40°C
Flow source nominal [ m3/h ] 5640 7380 3340 ~ 6680
Pressure drop source ( max. ) [ kPa ] 0.024 0.032 0.031
∆T recommended source [ K ] 7 7 7
Connection port size source [ " ] --- --- ---
Parameter of electrical connection and planing
Mains dimension [ mm2 ] 5x4 5x6 5x6
Voltage [ V ] 3 x 400 3 x 400 3 x 400
Safety protection [ A ] 25 32 32
Current - nominal [ A ] 9.32 11.8 8.64
Current - maximal [ A ] 16 18.6 18.4
Current - Start [ A ] 18.9 29.7 11.55
Softstart MCI 15 MCI 25 2 x MCI 12
Energy Efficiency Parameters and Performance ErP [ middle region Brussels ]
Energy class A++ A++ A++
SCOP 4.20 4.31 4.40
Seasonal energy efficiency η [ % ] 168 172 176
Rated nominal heating capacity P rated [ kW ] 22 27 26
Bivalent point [ ºC ] -7 -7 -7
Sound emissions - indoor Lw [ dB(A) ] - - -
Sound emissions - outdoor Lw [ dB(A) ] 57 58 58

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