A Series: High efficiency air source gas absorption heat pumps

Modulating heat pump, for outdoor installation, for the production of hot water up to 65 °C (70 °C for DHW).
Guarantees up to 165% efficiency, thanks to the use of air source renewable energy


A Series

The A Series of air source gas absorption heat pumps are ideal for heating and domestic hot water (DHW) production in residential, industrial, commercial, accommodation and tertiary utilities. They are meant for outside installation and can be used for upgrading or integrating existing systems.

The A Series range has the following advantages:

  • Up to 39.4% utilisation of air source renewable energy, exceeding peak efficiencies of 165% and guaranteeing up to 39.4% reductions in annual heating costs and in CO2 emissions compared to the best condensing boilers.
  • It is the most beneficial heating system to enhance the energy qualification of buildings because it permits a considerable promotion of the building’s energy classification with the consequent increase in the value of the building.
  • Increases the total efficiency of the heating system when it is combined or integrated with boilers with a lower energy performance.
  • All data is tested by certificates and approvals from ENEA for Italy, DVGWForschungsstelle and VDE for Germany, and the California Energy Commission for USA.
  • Its polluting emissions are lower than the limits set by the Blue Angel certification.
  • Ensures efficiency levels in excess of 145% even at -7 °C, so it is also used in especially cold climates. It thus avoids activating back-up systems (boilers and electrical heaters), which reduce the seasonal performance coefficients and hence increase consumption.
  • With a GAHP-A, every year 4.4 tons of CO2emissions are saved, which is equivalent to those absorbed by 604 trees or those produced by 2 green cars; every year 2 TOE are saved.
  • The installation of air source gas absorption heat pumps is supported by national and local incentive programmes.

Robur GAHP-A heat pump

Robur GAHP-A heat pump

Robur GAHP-A Indoor

Robur GAHP-A Indoor

Models available

  • HT: for the production of water at high temperature (for retrofitted radiator systems).
  • LT: optimized to produce hot water at low temperature (new systems with radiant panels or fan coils).
  • On request, GAHP-A units can be pre-assembled as links with the same units (RTA Series) or with other units.
  • Indoor: air source gas absorption heat pump for installation in a technical room.


Download the full design manual for all systems. Or use the links below for partial downloads.