How much heat do you lose overnight?

[tornadoinsideoutfig]

My house loses quite a bit of heat overnight. Three degrees in twelve hours last night but it has been as much as 6 degrees in previous December and January cold snaps. It has an EPC B rating and my bills are comparatively very low. However I've read that some other people's houses would not drop below 14 degrees. What does your house drop to inside without heating?

Thermostat batteries died apparently around 4pm yesterday oooops. We normally have it set to 18c by 7am this morning when we realised it was 16c.

We heat to 17 degrees. It goes on at 4pm and at that point it’s about 13 degrees if it’s a very cold day. Takes a couple of hours to get up to 17 degrees and goes off at 9.30pm.

In morning, comes on at 6am and if it’s been a frost or very cold might be down to about 12/13. It’s only on for an hour in morning but probably won’t get above 15 degrees if very cold.

If we go away for a few days and turn heating off or lower thermostat to about 12 degrees with it just being in for a couple of hours, if we get back when it’s not been on for a while in depths of winter it can be down to about 8/9 degrees.

Thermostat is in a room that gets the sun, so I imagine rooms that are north facing are significantly colder.

Ours drops down from about 19C at 10pm to about 14C by morning. Detached house 50years old

usually drop 3 degrees overnight - I don’t use the heating as it’s too expensive to run and the log burner warms the sitting room to 20C reasonably fast.

I have a blow heater in the bedroom and might turn it on for 5 mins if it’s under 9C in the morning but honestly, if I’ve got a thermal top under a cashmere poloneck and thick socks and trousers, I don’t need to light the fire til 4pm anyway.

I get the heated blanket out if I have to sit down for anything longer than a few minutes. But cooking, clearing up, generally sorting things out, if it’s 12 or 14, I’m not cold.

I’ve started keeping ours on 24/7 now - it’s set at 18 degrees and doesn’t come on half as much as it used too. It’s costing us less each month doing it this was as the boiler isn’t spending hours on a morning try to get back up to temperature! Our bills this year are roughly £10-£20 a month less than the same period last year.

Old rural house here, but with newly replaced doors & windows, and reasonable insulation in the loft.

I keep the thermostat at 17 degrees, plus run the wood burner in the sitting room, so that's warmer in the evenings, and warms the rooms above as well.

The temperature drops to about 14 over a normal frosty night, and down to 12 during that very cold spell before Christmas.

We have open chimneys, so like others, we don't have issues with mould.

Can I ask? How are you all measuring the temperatures upstairs vs downstairs? Is it HIVE heating systems?

We have digital clocks in the bedroom and lounge with temperature gauges on them.

My thermostat is downstairs and I have a cheap digital thermometer I can move around

We have separate zones for upstairs and downstairs so have one thermostat upstairs and one downstairs. Then have cheap digital thermometers in other rooms. Think they were about £7 for a 12 pack. They’re useful for knowing how the temperature elsewhere compares to the room the thermostat is in so that can be adjusted to get the rooms to the right temp. Also so that when I’m freezing and want to put the heating on extra I can look and see actually yes it is only 14 degrees in here put it on or it’s 17 degrees stop being a wuss 😆

20 degrees at bed time when heating goes off, usually 185degrees in the morning. During the cold snap when it was -5 outside over night it dropped to 17 degrees inside.

My house is rated A+ though, it’s an eco friendly new build, with built in solar panels etc.

3 degrees in 12 hours on a cold day sounds quite good to me, about what ours might do ( very well insulated),

Hi all I’ve been watching this thread with interest as my house loses a lot of heat overnight.
I have the heating set to 21’C and when it goes off at midnight the heat drops rapidly from 21 to 10 in 10 hours. When the heating comes on at 10 am I takes four & a half hours for the living room to get back up to 21’.
I sit there with a jumper on and a blanket over me.
The living room has two large radiators but it still takes a long time.
It’s a very old (200 years) bungalow with thick stone walls but I suspect no insulation. (It’s rented) My gas bill for the month of November was £180 and this will rise to £250 in December if it stays really cold.
The only gas appliances that use gas are the heating and shower/bath.

Exactly the same.

I'm in SW London for context and with a well insulated 1960s mid terraced house. I hate being cold and we can afford the heating so we have it on at 22 all day (so clicks on a few times) and goes off at 8.30pm. (We did put it up to 23 on Saturday as was so cold outside)

I've just checked and it's rarely dips below 19. I see last Sunday a.m. might have gone to 17-18. We sleep with our bedroom window open (door closed) every night and never have heating on in room (okay, it's bit chilly to go in there but it is a bedroom.) Insulation is so important.

Our bills are at most 180 gbp per month (last year coldest month). Insulation is the key.

It is badly insulated. I lived in far north Scotland several years ago in a top floored flat. Heating very important. As soon as I turned heating off the flat went cold. Got someone round to insulate loft........................incredible immediate difference. Some of the very best money I've spent.

Ours is at 18 when we turn it down at night and it was 14 this morning but I think it kicks in at 14 so wouldn't go below this anyway. We don't tend to put it above 18 in the day when we're in unless it's really cold.

The lowest it goes is 16 degrees on a very cold night. I usually heat it to 19 degrees in the morning and 20 degrees in the evening unless we have the stove going. We are basically very frugal with it but the house is well insulated.

I have a small, well insulated flat. The thermostat is set to 19 first thing, 18 during the day (WFH in a fairly small room) and 19 until 7 p.m. It is then 15 overnight. I have literally never had the heating come on between 7 p.m. and 6 a.m. (when it starts heating for the morning).

The thermostat is (unhelpfully) in the warmest, best insulated room in the flat so the temperature in the living room is actually about 1.5 degrees less a lot of the time.

This is really interesting. I always moan about our heating costs. 1980s house, large 4 bed with 5 receptions plus kitchen (not open plan). My heating is set at 18 in the day. I used 1 hour 18 mins of heating yesterday according to my app. South Midlands. It goes off around 7pm and has dropped to 15.9 now (5am). Thermostat is in the hall which is a cold part of the house. The bedrooms are far warmer.

I have no epc rating but I’d guess a D. No cavity walls (too many horror stories). Loft has decent insulation by standards 10 years ago. But it’s approx 1/4 boarded out so not much insulation in those parts. Boiler is new. Double glazing installed late 90s, it’s in very good condition but pretty old now.

I am really surprised by how little heat I seem to have lost compared to some others on here. Prior to reading this thread I would have said my house was poorly insulated tbh and lost a lot of heat, hence my poor epc estimate.

I set at 20 at the weekend if I’m cold but keep it lower when wfh and use a heated throw.

I am tempted to buy more insulation for the unboarded bits of loft after reading this to see if I can improve it.

I’ve started keeping mine at 17 day and night. I keep the Hive thermostat upstairs though as when it was in the hall the heating would be blasting out trying to keep the hall at 17 and roasting upstairs. I don’t mind a cold hall.

if it’s really cold on an evening we supplement the living room with the gas fire or a blanket.

Just wondering if it's just me or does your house lose temp overnight in summer also mine will drop 1-1.5 degrees

Sadly it'll only drop by one degree overnight if we're lucky. Today the forecast was 15 degrees max and the house is 22 degrees despite having the windows open all day. (No heating on!) I hate it 😞

Same here outside was about 16c very wet n gloomy house went from 20c at 6am up to 21.5 by 8pm no heating obv then by 9.30 dropped to 21c so am expecting it to say 19.5 by 6am at lowest it baffles me that it will drop same amount in summer as it does winter