Hi moojuiceuk,
Thanks for your reply. I love the name, I guess you are a dairy farmer?
No specific model as I was hoping to get info for different gases. However I have tried to find details for the Mitsubishi Ecodan R32 Ultra Quiet PUZ.
From my work installing swimming pool ASHPs I am aware of the vast difference in performance due to ambiant air temperatures and I understand that the humidity of the air would make a difference but I don’t know how much or wether high or low humidity gives the best COP?