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EVI Heat Pump Water Heater

  • W01R1 Series

  • Withair® / OEM brand as option

  • 8418612090

  • 12.0 ÷ 72.0 kW / 3.41 ÷ 20.5 Tons

  • 4.5 COP

  • Compressor - 5 year limited ; Other parts - 1 year limited

  • R410A, R134a, R407C,R22

  • DC inverter type; HITACHI, Daikin, Panasonic, MITSUBISHI,Copeland

  • Tube-in-tube, plate type, shell-and-tube heat exchanger

  • Hydrophilic aluminum fin coils heat exchanger

  • Office Use, Residential Use, Commercial Use, Industrial Use

  • 380V/3Ph/50Hz (400V/415V/3Ph/50Hz, 230V/380V/460V/3Ph/60Hz as option)

  • Withair® Water Heating and Air Conditioning Unit_Product Catalogue.pdf


Product Overview

—— Product Description ——

Withair® EVI Heat Pump is specially designed for cold climate region and adopts Ultra low temperature Enhanced Vapour Injection(EVI) compressor technology to guarantee a stable running even at -25°C.EVI heat Pump solve the client's room heating and hot water supply during the very cold climate region. (EVI compressor  -  enhanced vapor injection,Vapor-injected method can effectively improve heat capacity, prevent higher discharge temperature of compressor and guarantee operating stability of unit at low temperature).


Withair® EVI heat pump is one of the most economical systems to heat the water for family domestic use. Using free renewable energy from the air, the unit is highly efficient with low running costs. Its efficiency can be up to 3~4 times more than conventional gas boiler or electrical heater. 

—— The Key Advantages Include ——

● Eco-friendly refrigerant: R407c.

● Applied range: sanitary hot water, floor heating.

● Enhanced vapor injection Copeland brand compressor.
● Operate normally in - 30,and hot water 50.
● Two speed fan motor: further improve unit operation under high ambient temperature.
● Electronic expansion valve regulates the flow of refrigerant precisely.
● Heat-exchanger cycle technology to further improve operation under low ambient temperature.
● Air exchanger(Fins-coil) with hydrophilic coating.
● Galvanized plate shell, powder coating.
● LCD display wire controller.
● Set the operating time freely.
● Unit runs or stop automatically according to water temperature.
● Control the auxiliary heating (e.g. electric heating).
● With hot water return control, to keep the water warm in supplying pipe.
● Water Level Display and can be set freely("M" model).
● Available in combination with the solar collector and control automatically, saving more energy.
● Water flow protection control.
● Automatic prevent freezing function in the winter.
● Automatic defrosting.
● Failure diagnosing function.
● Modular design, units combine freely.

—— You May Like ——

  Withair Air Cooled Heat Pump Chiller (2)         WithAir® Water Tank (0)    Withair® Hydraulic module            Withair® Insulation pipe             Termostat controls (2)

Heat Pump Water Heater        +        Water Tank        +        Hydraulic Module       +       Insulation pipe        +        Thermostat

Physical Data


Physical Data of Withair® EVI Air Source Heat Pump Water Heater.png


1.    Standard hot water work condition: entering water temperature 15℃, leaving temperature 55℃;dry bulb temperature 20℃,wet bulb temperature 15℃.
2.    Standard floor heating work condition: entering water temperature 30℃, leaving temperature 35℃;dry bulb temperature 7℃,wet bulb temperature 6℃.
3.    All models, sizes, dimensions, and specifications are subject to change without prior notice, please refer to nameplates for the most accurate specifications.

Packaging & Transportation


● 100% test before deliverying products.

● Products catalogue, installation & operation manual will be sent together.

● Tracking number will be sent to customer as soon as we ship the products.

● Item shipped in 25 working days against payment depends on the quantity.

● Four steps of pakacges, plastic film, foam, carton and plywood for stable transporation.

● Ocean shipping, railway shipment and air transportation are acceptable according to customer demand.

Withair® provides two styles package for different transporation modes:
(1). Standard package(free of charge): unit is wrapped with plastic film, foam and carton, which is suitable for container shipment & a few transshipment cargo;
       Withair Heat Pump water heater package by carton 
(2). Special package(extra charge): unit is wrapped with plastic film and wooded box, which is suitable for bulk cargo transporation; 
       Withair Heat Pumps package by wooden box

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   Withair Group (China) Limited
   Withair (Nanjing) Industries Co., Ltd
    Office number: + 86 25 86696286
    Mobile number: + 86 13915928183 (WhatsApp)
    E-mail address: info@withair.cn ; jed@withair.cn
    Factory A: No.6 Lukou Chuangzhi Industrial Park, Nanjing,China,211113
    Factory B: No.9 Dongshan Bridge Industrial Park, Nanjing,China,211153
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