How fast does your house cool down ?

mac.d

Don't know what it is in 5 hours but overnight mine dropped from 18C to 14.5C last night & it took over 2 hours to get back up to 17.5C before I went out today. My house has external cladding, but I'm not convinced there is any insulation in it! I shudder to think how cold the houses here that haven't had the external cladding done must be. I need new radiators to try to get the house to heat up more quickly, but am unsure of how worth the cost I've been quoted of £800 is worth it when it cools so much when heating is off. 

My heated throw is already proving to be a big help.

FreeBear

macman said:

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.

Agreed, temperature differential is the key driver. Another factor is the thermal mass of the building. The chimney breast in my lounge absorbs a lot of heat when I have the fire going. This is released overnight helping to keep the room warm and also provides warmth to the bedroom above. Quality and quantity of insulation is also another factor.

ajbrowc

I'm in a 2014 south facing second floor flat. Indoor temp is still 21C despite not using the heating at all so far this winter. On a sunny day it goes up to 23C, then back down to 21C overnight. Not sure if the neighbours keep their flats at sauna temperatures, or the building is still holding warmth from the summer heatwave. Usually it's cooler by now.

ChasingtheWelshdream

Too quickly to drop the temperature and too slowly to heat up again. Yesterday’s stats - brrr.

MarkFromCornwall

macman said:

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.

It also depends on the wind speed, and Britain is windier than lots of European countries.

If you put your finger under a running cold water tap for a minute it will feel much colder than if you put your finger in a mug of cold water for a minute.

born_again

ariarnia said:

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

Hive stat logs temps.

So yesterday 07/12 between 00:00 & 00:00 08/12
Low of 16.88 between 02:00 & 03:00 
High of 20 between 18:00 & 20:00 (boosted to 20 from 19 as Mrs cold) dropping to a low of 18:33 T 00:00

Heating set @ 06:00 to 22:00 19C 22:00 to 06:00 17C on stat so comes on & off as required.

InvertedVee

Between midnight and 5am, our indoor temperature fell 1.7C (from 19.5C to 17.8C). No heating running during that time. Outside temperature was -3c. New 3-bed detached.

Spoonie_Turtle

Turns out last night would have an excellent night to check as I barely slept more than 30 mins.  I could have checked the thermostat at 4am, had I had any wits about me.

One of these days I'll bring the thermometer up to my bedroom to see what temp it gets up to and how far it drops in the hours before I go to sleep.  Would also be interesting to see what it gets back up to, with the door closed whilst the rest of the house starts heating up.  (I do have a radiator, but my room almost always feels the coldest except in the blazing sunshine of a heatwave.)

Spoonie_Turtle

Well I happened to glance at the thermostat 5 mins ago, and it said 17.5℃.  Bearing in mind heating is supposed keep it to 18℃ until 11pm.  Well now, 11.20pm, it says 17℃!  The thermometer concurs. 

Longwalker

Same area as Ballymoney and my living room - the only room thats heated in the evening , dropped 3 oC overnight , was still over 18 oC at 6 am and had dropped to 16.4 by 4 pm when I got home