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aroTHERM air source heat pump

Air-to-water heat pump

  • Suitable for specification in a wide range of properties
  • Can be integrated into domestic heating systems with minimal disruption
  • ErP rated A++ for hot water and heating efficiency
  • Dimensions in mm (5kW): W 970 x H 834 x D 408


aroTHERM air-to-water heat pump range has been developed for specification into a wide range of social housing or new build properties, with easy integration into existing domestic heating system causing minimal disruption to the occupier.

They also eliminate the need for on-site fuel storage and can be used as part of an efficient all-electric heating solution. Furthermore, aroTHERM offers excellent energy savings compared to alternatives like standard electric, LPG or oil, especially as all Vaillant heat pumps are MCS accredited and may therefore be eligible for government funding. aroTHERM can also reduce carbon emissions, whilst offering a more sustainable heating solution than oil and LPG sources.

Features and benefits:

  • Four models available - aroTHERM 5kW, 8kW, 11kW and 15kW
  • Compact size for easy siting - Possible to fit 5kW, 8kW and 11kW models under a standard window
  • Quiet operation - Sound power as low as 58dB(A) (5kW) with permitted planning available as low as three metres
  • Blue fin coated evaporator with anti-hydro coating - Gives improved performance and extra protection against corrosion
  • Ability to cascade up to seven aroTHERM heat pumps - Suitable for larger dwellings
  • Solid case design with in-built anti-vandalism measure - No requirement for extra vandalism cages



Heat pump type Monoblock air/ water heat pumpMonoblock air/ water heat pumpMonoblock air/ water heat pumpMonoblock air/ water heat pump
Flow/return heating connections, boiler side 1¼ "1¼ "1¼ "1¼ "
Product dimensions, widthmm9701,1031,1031,103
Product dimensions, heightmm8349759751,375
Product dimensions, depthmm408463463463
Net weightkg86102126165
Hydraulic lines material CopperCopperCopperCopper
Hydraulic connections material BrassBrassBrassBrass
Hydraulic seals material EPDMEPDMEPDMEPDM
Plate heat exchanger material AISI 304 stainless steelAISI 304 stainless steelAISI 304 stainless steelAISI 304 stainless steel
Pump casing material Painted cast ironPainted cast ironPainted cast ironPainted cast iron
Pollution rating 2222
Supply voltage / frequencyV/Hz230/50230/50230/50230/50
Fuse type T4AT4AT4AT4A
Inverter controller fuseA/VHRC 20/550HRC 20/550HRC 20/550HRC 20/550
Level of protection IP 25IP 25IP 25IP 25
Maximum start-up currentA16162025
Maximum current consumptionA16162025
Pump power consumptionW15 - 7015 - 7015 - 706 - 87
Fan power consumptionW15 - 4215 - 4215 - 7615 - 76 (2 x fan)
Electrical classification llll
Overvoltage category llllllll
Fan rotational speedrpm550550700600
Sound power level for A7W35 according to EN 12102 and EN ISO 9614-1dB(A)58596565
Sound power level for A7W45 according to EN 12102 and EN ISO 9614-1dB(A)58596565
Sound power level for A7W55 according to EN 12102 and EN ISO 9614-1dB(A)58606666
Maximum DHW flow temperature°C60636363
Minimum air temperature (heating and cylinder charging)°C-15-20-20-20
Maximum air temperature (heating)°C28282828
Maximum air temperature (cylinder charging)°C46464646
Maximum air flowm3/h2,0002,7003,4005,500
ErP rating (@ 35°C)  A++A++A+A++
ErP rating (@ 55°C)  A+A++A+A+
Heating circuit
Minimum operating pressurebar0.
Maximum operating pressurebar3.
Heating circuit water contents in the heat pumpl1.
Minimum heating circuit water contentsl17213560
Minimum volume flow ratel/h3803805401,200
Nominal volume flow ratel/h8601,4001,9002,590
Hydraulic pressure differencembar640450300370