So I would like to share my thoughts around heating, because this what was really got me in to openhab in the first place.
So there are several heating options on the market: Water heating, radiators,hvac, air conditioner, heating cables etc.
To control these you would typically set desired temperature and the heating itself will have some kind of regulator inside(maybe just on/ off with an error margin of 1F or so). Second thing we need to know which can only be found out by experiment, is how fast the heating is responding to a set temperature change. We only need it roughly in my opninion, lets say we want to have 20C at 8 in the morning and we know it takes about 30 min from 16C, then we need to switch on 7.30 right. So we assume that the heating grading is 8C per hour.
So we have to options, we either use that value or we adjust our timers by guessing that the temperature is 16C at7.30 and ignore the fact the it is actually 18C and we could have waited another 10min before turning heat on.
So now the intersting part comes which I would like to discuss with you guys.
So what I have done is that I have created a new sitemap which I call admin, and here I have added some items. Here I have created items for each set point temperature for each room and for each mode.
I have then made 4 modes,
in addition have two modes which are not displayed in the gui, windows open, and night mode(will add these as well)
So my rules are not perfect, but I use presence, ifttt and google calender to try to set the correct mode.
So idea is:
When mode is home, living room set temperature is 20C, when I am away its 16C and holidays I lower it to 4C, and soon home I just turn on heat on maximum untill home temperature are reached.
So my question is what should the ideal temperature be for the differnt modes? Is there any scientific suggestions? I have bathrooom, living room, hallway,2 bedrooms, where one bedroom is combine bedroom and office(guest bedroom)
Do we actually save some energy by turning on and off heat while being away? Is it worth the effort?
How has other done their heating?
I will upload my items and rules if that is of interest.