I have air conditioning throughout my flat that also does the heating (heat pump) and in both summer I keep rooms at 22C during the day when im up and about and then 23C at night when sat down in front of the tv. At night the bedroom is at 22C to sleep in. Without the air con on my bedroom which has massive bay windows gets the sun from when it comes up to about mid morning and the room can easily get upto 30C, luckily I fitted blackout curtains that reflect most of the suns heat back out so the room can get upto 25C without the air con on. The lounge can get upto 28C on a hot day and thats with no sun facing windows, its a victorian house so its so badly insulated and due to other rooms such as bedrooms getting heated by the sun the heat goes through to other rooms. In winter I keep bedrooms at about 20C and lounge at 22C. IF its really cold out the house walls get cold inside and due to the high ceilings its nessasary to bump it upto 23C to offset draughts from the air cooling against the walls. Humidity in summer is usually about 55% and winter can be about 45 to 55%