My tips would be: (sorry if they are a bit obvious) 1. Make sure to point the vents down so the hot air blows into the lower area. (And naturally, in the summe

My tips would be: (sorry if they are a bit obvious) 1. Make sure to point the vents down so the hot air blows into the lower area. (And naturally, in the summer when you use them for cooling they should point up) 2. Set a higher temperature. The thermometer tends to be part of the unit itself so it tends to measure the hottest spot in the room (both when heating and when cooling), so you think you are wasting money blasting the heat to 25C when actually it is just that the unit isn't running since it only keeps itself hot. Some units come with a function that pretends to use a thermometer built into the remote, but I don't think I've ever seen it do anything other than burn through the batteries. 3. Since you are talking about mini-split heat pumps (plural) I assume you have one per room so a good tip here would be to close the door to that room. For my own needs they are more than enough, but then again it doesn't get quite as cold in Israel as it does in Canada :)