What is Air to Water Heat Pump?

Heat Pump is a device which extracts heat from air and transfer heat for heating water. Main components of heat pump are

1) Evaporator, 2) compressor, 3) Condenser, 4) Expansion valve, 5) Fan


Ambient air flows through Evaporator coil and is sucked by axial fan. Evaporator coil is protected buy filter against dust. Fan is with protection grill. Outgoing air is cooler by 3to 50C than incoming ambient air.

Expansion Valve

This device causes sudden pressure drop in liquid refrigerant. In turn liquid temperature drops to temperature below that of ambient air. It is ready to receive heat from air. Thus gas cycle gets completed.

Evaporator coil

It is made of copper tubes with aluminum fins. Refrigerant in liquid form flows through this coil. Refrigerant gets heat from air to get converted to gas form.


Gas is compressed buy compressor to elevate temperature and pressure.


It is nothing but insulated tube to tube heat exchanger made of copper tubes with S.S.304 casing. Provision is made for gas as well as water connections. Heated gas passes through one tube while water passes through the adjacent tube in opposite direction. Water gets instantly heated. In normal design difference in temperature is 300C. Water gets heated from 250C to 550C.Refrigerant gas is condensed and goes to liquid form at same pressure as discharged by compressor.

Heat Pump Assisted
Solar System


Heat Pump Schematic


Wrap Air / Water



  • Very Low Operative Cost.
  • Generation of multiple hot or cold utilities give added flexibility in matching the heating and cooling effects produced by MWE Heat Pumps.
  • It completely eliminating the needs to handle any hazardous fuels environment.
  • Eliminates CO2 emission and maintains cleaner environment
  • Big reduction in Maintenance Costs.
  • Compared to conventional systems, the maintenance costs in minimal. MWE System only requires yearly checks & cleaning.
  • Attractive payback in the range of 3 to 18 month are achieved most of the cases with proper application engineering.


Model no. Jal_S/100T Jal_S/150T Jal_S/200T Jal_S/300T
Heating Capacity kW 3.71 4.9 4.9 4.9
POWER CONSUMPTION kW 0.90 1.23 1.23 1.23
COP with ΔT of 30°C and maximum rise in temperature in one pass is 7-10 °C. coph 4.12 3.98 3.98 3.98
Overall Cop coph 3.7 3.4 3.4 3.4
Instant and Rated Hot Water Output Rise in Temperature °C 30 30 30 30
I/h 110 140 140 140
Refrigerant R407C R407C R407C R407C
Fan Quantity 1 1 1 1
Power input/W 60 60 60 60
Noise in 1 meter distance dB ≤ 54dB(A) ≤ 54dB(A) ≤ 54dB(A) ≤ 54dB(A)
Dimension mm 850/260/540 850/260/540 850/260/540 850/260/540
Pressurized Water Tank Dimension mm 470*112 470*1592 555*1333 555*1839
Model no. JAL_MUG/150 JAL_MUG/250
Heating Capacity kW 5.58 7.4
Power Consumption kW 1.32 1.85
Heating COP with ΔT of 30°C and Maximum rise in one pass is 7 - 10 °C. coph 4.2 4.2
Overall COP coph 3.4 3.6
Rated Hot Water Output Rise in Temperature °C 30 30
l/h 160 250
Compressor Type ROTARY SCROLL
Refrigerant R407C R407C
Fan Quantity 1 1
Power input/W 60 60
Noise in 1 meter distance dB ≤ 54dB(A) ≤ 59dB(A)
Dimension mm 1005/305/587 1110/530/1260