ASHP Vs GSHP

The principle of operation is the same as the ASHP, the difference results from the source which is here, the ground. The heat is extracted from the ground, a fluid circulates through the buried pipes in horizontal ditches or in vertical boreholes.

ASHP GSHP Heat pump in general
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  • Cheaper and quicker than GSHP (no need to install a loop in the ground)
  • COP higher than ASHP in winter (temperatures higher in the ground)
  • Cheaper to run than oil and gas boiler
  • Reduction of CO2 emissions
  • Less maintenance and safer than combustion heating system
  • Can provide cooling during summer
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  • Less efficient in winter
  • Need a fan system to blow air through HX : need energy and produce noise
  • Need a defrost cycle to prevent ice on HX
  • Need more space
  • Need to do a trench in the ground
  • More expensive
  • High start-up cost
  • Heat transfer fluid can be pollutant
  • Difficult to install : understanding movement of heat, significant work in garden/house