# Air-to-air AC and HP module

Hello,

I am trying to find a program/script that I can extract from energy+ source code on GitHub that can mimic a simple air-to-air AC for cooling in the summer but could also be used in the winter for heating - i.e. Reversing the flow of refrigerant and used as air-to-air heat pump.

- Is the DX air cooling coil suitable for this? If so, can I use the same for the HP mode?
- Where is the cooling capacity modifier curve function of temperature taken from? And what about the one for heating?
- Where is the nominal COP and Capacity taken from? Is it from any of the manufacturer's specs?
- Where can I find which type of AC/HP make and model can be modelled using this method?

In the end, I will simply need to use the simplest model out there that can model an AC and HP capacity and cop as a function of air temperature and humidity, it does not need to be energy-plus’s but this is what I found so far. It just needs to be open source and with a manual describing the assumptions and equations it is using so that I can understand what it is doing.

If anyone has any answers/suggestions I'd be grateful.

Thanks