Hi @QGgWW2WhH
A couple of things that may help.
Ours is as loud as a tumble dryer so we used that as a guide to tell how annoying it would be. I know that’s why less scientific than what you are trying to achieve.
Ours is also over-sized and it rarely runs efficiently because it can’t modulate low enough.
I’ll be honest and say that I’m actually glad it’s oversized and that it cycles because it runs about 10-15 minutes per hour much of the shoulder months so we don’t care about a bit of noise (even from the circulating pumps) because it’s not on much of the time. It’s why I like the revised algorithms I created.
This is a graph with the “average outdoor temp for the day” on the x-axis which shows how the original controller keeps the system running a lot more of the time.
MyForest
PS having a solar PV diverter also means that much of the time in the Summer (when we’re using the garden) the heat pump doesn’t kick in (such as today).