Never really heard of using a conservatory to heat your home until Jiries started talking about it. Most things online are about solving cold conservatory's. 
Our house has large windows which helps when it is sunny, e.g 3 metres long and nearly 2 metres high in the living room.  Our ground floor extension also has a couple of skylight windows , next doors has a glass dome on theirs, these things probably all help when it is sunny/bright. 

Originally Posted by: Tim A 

Our underfloor heating very rarely comes on due to heating by the sun. Our living area has bi-folds along the width of an East facing wall that gets morning sun, plus a large roof lantern that gets the sun almost all day, so it’s super cosy in winter.  However it can be awful in hot weather because keeping doors and windows closed keeps it hot, rather than cool.  It was a constant 27c indoors yesterday and would have been worse but for a light breeze pulling through with all doors and windows open.  We’re seriously thinking about getting air con installed. 

Originally Posted by: Caz 

My personal view is that is is worth living in a house that retains as much heat as possible given our climate , the vast majority of the over 500k minutes in a year it is cold, cool or mild rather than warm or hot. (Sone nice graphics show this but can't find) 
Last night was a tad hot though, 26c all night upstairs.
Recognise that it is cooler here though, anywhere SE of Leeds and on lower ground has a bit of a different climate and seems to cool off so much more slowly well into the evenings. 

Originally Posted by: Tim A 

My personal view is that is is worth living in a house that retains as much heat as possible given our climate , the vast majority of the over 500k minutes in a year it is cold, cool or mild rather than warm or hot. (Sone nice graphics show this but can't find) 
Last night was a tad hot though, 26c all night upstairs.
Recognise that it is cooler here though, anywhere SE of Leeds and on lower ground has a bit of a different climate and seems to cool off so much more slowly well into the evenings. 

Originally Posted by: Tim A 

23.7 Indoors at the moment. Early power cut had no effect as the heating was not switched on.

Originally Posted by: ARTzeman 

My personal view is that is is worth living in a house that retains as much heat as possible given our climate , the vast majority of the over 500k minutes in a year it is cold, cool or mild rather than warm or hot. (Sone nice graphics show this but can't find) 
Last night was a tad hot though, 26c all night upstairs.
Recognise that it is cooler here though, anywhere SE of Leeds and on lower ground has a bit of a different climate and seems to cool off so much more slowly well into the evenings. 

Originally Posted by: Tim A 

Our house reached 21 C in most rooms today, 22 C upstairs. Thats quite high for us. 20 C outside but a moderate cooling breeze.

Originally Posted by: Crepuscular Ray 

Sounds pleasant to me! Here, it's 27C upstairs, 24C downstairs, and the windows have been open all day upstairs (they've been closed most of the day downstairs, with curtains drawn). 23C outside, down from a high of 25C earlier.

It's the humidity that's the killer, btw; when the dewpoint is hovering between 18 and 20, as it has been today, it takes an age for things to cool down indoors. (Indeed, even though I'll get my bedroom down to 21 via the portable a/c, it will only take 30 minutes after it's turned off for temperatures to equalise with the rest of upstairs... then all the warmth will slowly rise from downstairs through the night, keeping it toasty. It'll be 23C or more through most of the night. 🥵)

Originally Posted by: Retron 

Sounds pleasant to me! Here, it's 27C upstairs, 24C downstairs, and the windows have been open all day upstairs (they've been closed most of the day downstairs, with curtains drawn). 23C outside, down from a high of 25C earlier.

It's the humidity that's the killer, btw; when the dewpoint is hovering between 18 and 20, as it has been today, it takes an age for things to cool down indoors. (Indeed, even though I'll get my bedroom down to 21 via the portable a/c, it will only take 30 minutes after it's turned off for temperatures to equalise with the rest of upstairs... then all the warmth will slowly rise from downstairs through the night, keeping it toasty. It'll be 23C or more through most of the night. 🥵)

Originally Posted by: Retron 

Averaging around 20c here around the house. Too warm for me but more pleasant compared to your ongoing horror.  

Originally Posted by: Chunky Pea 

All I'll say is that if you ever visit the SE of England, make sure to book a hotel with a/c!

And talking of which, due to the humidity my portable really struggled last night... it may have been "only" 25C outside, but even after 3 hours it only managed to take it down from 27C to 23C in my bedroom... it was a very sticky night's sleep.

I set it to turn off after 2 more hours (during which I didn't get to sleep... it's loud, and I'm a very light sleeper), and then of course the temperature shot straight back up.

This morning it's 25C upstairs and 23C in the living room, 24C in the kitchen... and though I've put the fan on the patio, the air outside smells stale and musty, no surprise really as it's 19C (dew 17.2)!

Hideous.

As to those cold-blooded - and non-elderly - people who actually enjoy slowly cooking at 25C... all I can say is that they're very much an outlier in the UK. Even the WHO recommends setting temperatures to 21C in living areas by day and 18C in bedrooms at night.

(Mind you, have you seen how many people see skin damage as a good thing? There's no safe way to tan , and at school my nickname was "Daz" - because I was whiter than white! At least I should avoid skin cancer, unlike my uncle and some of my friends...)

Originally Posted by: Retron 

.

(Mind you, have you seen how many people see skin damage as a good thing? There's no safe way to tan , and at school my nickname was "Daz" - because I was whiter than white! At least I should avoid skin cancer, unlike my uncle and some of my friends...)

Originally Posted by: Retron