Modelling a hybrid system: Boiler with Air Source Heat Pump

[S1231046]

Hi everyone!

I am working on an IES model to assess different low-carbon options for a historic building.

The scenario which I want to assess is installing an air source heat pump alongside the existing boiler to offset the gas heating demand.

Is there anyway of modelling this in ApacheSim (without necessitating the use of ApacheHVAC - for which I do not have the experience or expertise)?

Thank you in advance.