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Thread: Living room temp at night

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  1. #1
    Automated Home Jr Member
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    Default Living room temp at night

    Hello,

    Whats everyone view on a temperature of a living room when unused at night?

    I was keeping it at 18C at night, i think if i go lower takes too long to the living room to heat up in the morning.

    Cheers

  2. #2
    Automated Home Jr Member
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    Hello,
    what is a daily temperature?

    it all depends of room conditions... is it well insulated, how many rads, whats the area...
    but setting it too low might create false impression of making savings...

    anyways - you can try with optimization->optimum start where heating starts in advance to be ready with desired temp on the given time.

    what I observe on underfloor heating it makes very little sense to lower night temp more that one degree. heating up in the morning takes too long.

  3. #3
    Automated Home Jr Member
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    Its a bit tricky.

    We usually have it set between 19-20 during day.

    Its a combined living room and digning room with 2 separate heaters (2 different zones following the same heating pattern)

    Due to co concreate floor under the laminate board the heat lose is quite high i suspect

  4. #4
    Automated Home Sr Member
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    All mine effectively goes off at night (set to 8 degrees). But rely on Optimum start to have the rooms at temperature I want when I want. No guessing about what time to turn things on. And I don't have a very well insulated house.

  5. #5
    Automated Home Legend
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    Quote Originally Posted by lloyd View Post
    All mine effectively goes off at night (set to 8 degrees). But rely on Optimum start to have the rooms at temperature I want when I want. No guessing about what time to turn things on. And I don't have a very well insulated house.
    Same here.

    We just turn off all our downstairs zones at night (5C in the schedule) and rely on Optimal start to figure out when to turn them back on again to reach the target temperatures at the desired waking times. Each zone has a different warm up speed so they don't all come on at the same time either.

  6. #6
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    Quote Originally Posted by DBMandrake View Post
    Same here.

    We just turn off all our downstairs zones at night (5C in the schedule) and rely on Optimal start to figure out when to turn them back on again to reach the target temperatures at the desired waking times. Each zone has a different warm up speed so they don't all come on at the same time either.

    this might provide false impression of making savings on heating because is off over night, but sometimes bringing the temp back up will cost more than just keep maintaining bit colder over night...

  7. #7
    Automated Home Guru
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    Quote Originally Posted by olektrolek View Post
    this might provide false impression of making savings on heating because is off over night, but sometimes bringing the temp back up will cost more than just keep maintaining bit colder over night...
    Yep - ever since I got Evohome back in 2012 I have have scoured the internet along with participating in/watching many a discussion on this forum exactly on this subject - What I have never found to date is a definitive study that could in a controlled situation answer that very question. It is impossible to carry out a study one self due to having to duplicate the two environments in parallel. Just trying to repeat the test in the two methods say over two separate weeks obviously has so many variables weather wise etc etc that makes the comparison nugatory. Love to see a controlled study that could answer this question once and for all though if anyone ever finds one/has found one

  8. #8
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    Quote Originally Posted by olektrolek View Post
    this might provide false impression of making savings on heating because is off over night, but sometimes bringing the temp back up will cost more than just keep maintaining bit colder over night...

    This is absolutely never the caseÖ

    Imagine your room as a box and your heat as energy. If energy is escaping the box you need to supply the equivalent amount of energy to maintain a consistent temperature. Letís say 10 units of energy escape over an hour period. If you didnít provide any energy to the box for one hour, in the next hour you would need to provide 20 units to get back to the same temperature - exactly the same amount as you would have used to maintain a consistent temperature.

    The issue you have is that the heat loss from a house is directly related to the inside vs outside temperature differential. The higher the differential the higher the heat loss. As such it will always be more effective to turn the heating off and then reheat the room. Even if you had perfect insulation you would only ever use the equivalent amount of energy.

    Obviously boiler efficiency and running in condensing mode plays a part in this but in most homes heat loss at higher temperature more than exceeds the efficiency gains from a boiler ticking away under opentherm control whilst condensing

  9. #9
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    Quote Originally Posted by DBMandrake View Post
    Same here.

    We just turn off all our downstairs zones at night (5C in the schedule) and rely on Optimal start to figure out when to turn them back on again to reach the target temperatures at the desired waking times. Each zone has a different warm up speed so they don't all come on at the same time either.
    Itís the same here

  10. #10
    Automated Home Guru
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    We turn everything down overnight and just schedule the heating to come on early enough to get the room comfortable for when we need to use it. A well insulated home helps.

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