How fast does your house cool down ?

FreeBear

An interesting map from the BBC a couple of weeks back - The data is a little misleading as it doesn't take in to account the average outside temperature. Italy is always going to be warmer than Sweden or the UK on average... So a question - How fast does your home cool down overnight without the heating on ?

https://www.bbc.co.uk/news/explainers-60289396

FreeBear

FreeBear said: ... So a question - How fast does your home cool down overnight without the heating on ?

Last night, with the outside temperature down to 2°C, it took five hours to drop 1°C in the hallway (where the CH thermostat is located) from 18°C.

Ballymoney

FreeBear said:

Last night, with the outside temperature down to 2°C, it took five hours to drop 1°C in the hallway (where the CH thermostat is located) from 18°C.

That’s incredibly impressive.

We currently switch the heating off at 22:00 at 19c and by 08:00 today the temp in the hallway had dropped to 13.5c. It was -2c here though. Took a good 1hr 45 to get the house up to 18c. 

130kwh of gas used in last 24hrs.

chris_n

5 hours to loose 2 degrees from 18 to 16 in the hallway where the thermostat is. Living room in the same timeframe dropped from 20 to 18.5 with the door open. 1980's semi in North East England. 

That map shows how shockingly bad UK housing stock is!

Bear in mind the Northern part of Italy is mountainous and snow covered in winter. 

piperm87

our house is poor with the heat - surprisingly as its had new windows and doors 2 years ago and the 3 bedrooms and living room/dining room have been refurbished by myself. I turned heating off last night at 19.5 degree in our living room and this morning at 6AM it was down to 15.0 degree. both ours and our sons was at 20.0 degree at 10PM and his was at 15.5 and ours was at 12.5 at 6AM.... My 5 month old daughters room went from 19.0 to 14.5 in 2 hours before the oil filled rad kicked in in the night but her room is over the garage which i will be insulating next year but pretty shocking really.

tacpot12

Takes 8 hrs to drop from 15C to 10C in our lounge. This is just over 3C in 5 hours, so we are slightly worse than the UK average, which is what I expected. The house is a Victorian terraced house with solid walls, and minimal loft insulation. The insulation is something I'm going to be working on over the winter.

Magnitio

1970's 4 bed detatched. Went from 17 to 15.2 in 5 hours and it was -4.5 degrees outside at 8 this morning. If the house had been at 21 degrees at the start, it would have fallen further in the same time period, so probably exceed the 3 degrees drop. Probably not what is considered an average night, nor an average house.

macman

Worth pointing out that the rate of heat loss is directly related to the differential between the indoor and outdoor temp.
The greater the difference, the greater the rate of heat loss.

Olly_J

One other thing worth checking is are you losing heat up an open chimney, even if behind an unused gas fire, as that is a sure way for a house to cool down quickly

BUFF

chris_n said:

5 hours to loose 2 degrees from 18 to 16 in the hallway where the thermostat is. Living room in the same timeframe dropped from 20 to 18.5 with the door open. 1980's semi in North East England. 

That map shows how shockingly bad UK housing stock is!

 

because we have a higher % of older housing. I am actually surprised at how little better Belgium, France & Nl are than us.

ariarnia

how do other people measure the temp loss of the HOUSE? 

we have a thermometer on the fridge (only a cheap one but its magnetic so thats where it lives) and one of those weather sensor things in the lounge thats part of a digital photo frame someone bought us. both only measure the temp in one room and probably not very well at that. and our weather station used by the met office is something like 10 miles away so the outside temp also isnt the most reliable. so i don't know how i could go about answering the question in the op in any way that i thought was close to accurate. 

the closest i could probably say is last year when there was snow outside we could let the fire go out at 10. the lounge would be about 20/4 degrees with the thermostat set at 15 and the thermostat (directly outside the lounge and gets covered by the door curtain sometimes) wouldn't come on (normally) before we'd lite the fire again at about 3 when it was getting dark. unless someone decided to stand in the door with a cat debating about going outside... 

but upstairs probably wouldn't have reached 20 and would of been colder than 15.