Whole house ASHP system design

[flanagaj]

Can I ask those who have done whole house ASHP for DHW, heating and cooling who did your system design.  I have decided that I want UFH downstairs and ceiling mounted fan coil cassette units upstairs, but I want to install the system myself, except the ASHP or the parts that I cannot install myself.  I suspect that if I simply give my plans to a ASHP company and get them to supply and install, it's going to cost a fortune, hence why I am keen to get a system designed, so I know what is required.   

I could be over analysing this, and it's a simple case of understanding the heat loss calcs for each room and then simply purchasing the appropriate fan coil unit and running the pipework to the unit from the plant room and if appropriate putting in condensate drains.
 

Edited 3 hours ago by flanagaj

[JohnMo]

19 minutes ago, flanagaj said:

but I want to install the system myself, except the ASHP or the parts that I cannot install myself

Should be able to do everything yourself. Why can't you install the ASHP? 

 

Most installer will look blankly at when you mention cooling, especially when you utter UFH as cooling.

 

Condensation drains are only needed if you run below dew point, one real reason to do so, is if you don't size the fan coils correctly. If you size for a flow temp at around 16-17 then condensation isn't an issue.