House heating; most efficient way.

[matt.]

I have a small 3 bed semi in Aberdeen.
New gas boiler. Radiators with thermostats in all rooms.
Heating comes on from 6.30 am to 9.30 am
Off all day with frost protect until 5 pm and then off at 9.30 pm.

Lets skip the best supplier for another time.
Question is; is it more efficient / cheaper, to keep the heating on a low temp during the day and overnight to avoid a big heat jump requirement when the heating timer kicks in?
We don't feel we need to be warmer during the day and night.

Thoughts folks

 

[MmmBeer]

It will always be more efficient and cheaper to keep the heating turned off when the house is unoccupied. If you find it too cold when you return from work in the evenings, you could move the 'On' time slightly earlier. Having the heating on low while you are out will only succeed in keeping the sparrows on your roof warmer.

 

[JockyBrewer]

Turn it off when you don't need it, it'll be cheaper.

I don't know who came up with the idea that it's cheaper to leave your heating on low during the day, but it's rubbish unless you're on some weird tariff that gives you cheaper energy units during the day than in the evening. Not impossible, but rare.

 

[matt.]

Turn it off when you don't need it, it'll be cheaper.

I don't know who came up with the idea that it's cheaper to leave your heating on low during the day, but it's rubbish unless you're on some weird tariff that gives you cheaper energy units during the day than in the evening. Not impossible, but rare.

Thanks. Good opinion.
Re weird tariff; my supplier promoted free electric between noon and 1 pm.
Ah ha; the free part was whatever I used in excess of what I usually used between noon and 1 pm.
A little bit naughty in how they phrased the 'offer'.

 

[JockyBrewer]

Another option is to add some smart radiator valves, so that you can program a heating schedule for each room, so you're only heating the rooms you're actually using. They're really quite cheap now (£27 per valve, plus you need a similar price gateway for the house: https://www.amazon.co.uk/SONOFF-Thermostatic-Radiator-Installation-Assistant/dp/B0CFXY26H1/).

My house has an Evohome system which was installed nearly 10 years ago, but paid for itself within a couple of years as at any given time we tend to only be in one room so heating the rest of the house is pointless. My system goes a bit further as it actually only turns the boiler on when heating is required, but it was quite a bit more expensive at the time. Starting over I'd definitely look at those SONOFF valves or similar.

 

[Larse]

Turn it off when you don't need it, it'll be cheaper.

I don't know who came up with the idea that it's cheaper to leave your heating on low during the day, but it's rubbish unless you're on some weird tariff that gives you cheaper energy units during the day than in the evening. Not impossible, but rare.

The reasoning (and it's somewhat dependant on the level of insulation in the house) is that because you're keeping a low level of heat throughout the house, you don't get as much heat migration when one room is heated to a slightly higher level.

Otherwise (since cold air falls - often mistakenly described as hot air rising) you get draughts as cold air migrates to the warmer areas of the house making the heating system work harder to maintain the set heat levels there.

 

[MashBag]

I am a low & slow myself. Your body also acclimatises to a lower range, which saves too.

 

[LeeH]

The reasoning (and it's somewhat dependant on the level of insulation in the house) is that because you're keeping a low level of heat throughout the house, you don't get as much heat migration when one room is heated to a slightly higher level.

Otherwise (since cold air falls - often mistakenly described as hot air rising) you get draughts as cold air migrates to the warmer areas of the house making the heating system work harder to maintain the set heat levels there.

Due to the constant energy losses while the heating is on, it does not stack up.

Cheapest way to heat a house is a log burner and good use of your hunter-gatherer skills.

 

[Larse]

Due to the constant energy losses while the heating is on, it does not stack up.

Cheapest way to heat a house is a log burner and good use of your hunter-gatherer skills.

I did say it was insulation dependant. You've got a heat leaky house, you may as well burn the money instead.

 

[matt.]

I am a low & slow myself. Your body also acclimatises to a lower range, which saves too.

I'm just going to run this by Mrs. Matt..........