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Frequently Asked Questions

Your questions, answered.

What is an Air to Water Heat Pump?
There are two types of air source heat pump – ‘air to air’ and ‘air to water’. The Grant Aerona uses an air to water system which utilises heat energy captured from the air in ‘wet’ heating system radiators or underfloor heating. The process uses the same vapour/compression cycle that extracts heat in a domestic fridge. A refrigerant with a low boiling point is exposed to external air temperatures in an evaporator. The liquid boils off to a gas and absorbs the latent heat energy of the air. This gas is then compressed increasing the heat content in the refrigerant, before passing through a heat exchanger where it condenses back to a liquid state while transferring the heat to the water of the heating system. The liquid refrigerant is then re-circulated through the evaporator and the cycle is repeated. The heat source used by Grant Aerona³ heat pumps is entirely renewable which helps reduce the amount of harmful greenhouse gases being released into the atmosphere and, in so doing, lowers the carbon footprint of the household.
What is the guarantee with the Aerona ASHP?
Grant Aerona³ air source heat pumps are guaranteed for 5 years from the date of installation, unless the installation is more than six months from the date of purchase in which case the guarantee period will commence six months from the date of purchase. The guarantee period will be a total of three years (excluding consumable items) if the product is registered within 30 days from installation, subject to being serviced annually and installed in accordance with the manufacturer’s instructions. On completion of the installation, the heat pump must be commissioned and submitted to Grant Engineering Ireland Ltd.