How hot the water is needed for heating with radiators?

Dear all, :cool:
I have a project with an air source heat pump water heater for the house heating with radiators. do you have any idea about what temperature does the hot water needed to run inside the radiators?

Air source heat pumps heat water to somewhere around 55 to 60 degrees c here.

Quote:

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Originally Posted by mikeref

Air source heat pumps heat water to somewhere around 55 to 60 degrees c here.

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thanks, mikeref.
but hot water with 55 to 60 degree c for what use? house heating? sanitary hot water?

Unless you select a high temperature ASHP unit which will provide central heating water flow temperatures of between 70 and 80C, the maximum water flow temperature from an ASHP will be 55C.
The temperature of the domestic hot water can then be adjusted upwards using an immersion heater in the hot water storage tank.
If you are using the LT version, you will need to ensure that you radiators are suitably oversized to give the heat output required with the lower flow temperature.

thanks hyperion.

Now only LT version ASHP available for me. I think I will take your suggestion on LT version.
thank you, my friends.

Whichever size ASHP you choose, make sure that you have sufficient water content if the radiators have TRV's fitted. If all TRV's or zone valves should close, you will need to maintain a minimum water content and flow rate to prevent lock outs on the ASHP due to low water flow.

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Hi,I'm Sam.Happy new year!