Ben,
Unfortunately I cannot change the system as I am simulating this model based on a real one. Yes it is true, I could raise the temperature to 30 C, but the problem is that I find the heat loss too high for a highly insulated house. I have the earth to air heat exchanger that brings my temperature to about 10 C during winter (t_put) then the heat recovery unit that brings it to about 20 C (t_rec) and after that an auxiliary heater which brings the temperature to 25 C (with a daily schedule from 8 AM to 8 PM) and the temperature during daytime reaches about 21 C but during the night it goes to about 15 C (considering that the EAHX and the heat recovery unit are still working). The exterior wall is made of 30 cm brick and about 20 cm mineral wool while the windows are triple glazed. Do you think this is normal?
Thank you,
Dragos Bogatu
