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Preparing for extreme heatwaves.
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kenneal - lagger
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Joined: 20 Sep 2006
Posts: 12156
Location: Newbury, Berkshire

PostPosted: Wed Jul 24, 2019 10:37 pm    Post subject: Reply with quote

Our humidity is fairly constant around 55% so always comfortable. One of the advantages of cob and lime walls.
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adam2
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Joined: 02 Jul 2007
Posts: 8005
Location: North Somerset

PostPosted: Thu Aug 13, 2020 1:35 pm    Post subject: Reply with quote

I have resorted to air conditioning in the current heatwave.
Reluctantly on account of the noise produced and electricity consumed.

Indoor temperatures reached 26 degrees with over 70% RH. 26 degrees is tolerable at a low RH but is most uncomfortable if humid.

With a portable air conditioner in use, the space temperature was reduced to 23 degrees and the RH much reduced to 50%
Running cost estimated at about 10 pence an hour.
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kenneal - lagger
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Joined: 20 Sep 2006
Posts: 12156
Location: Newbury, Berkshire

PostPosted: Thu Aug 13, 2020 2:19 pm    Post subject: Reply with quote

Our house has worked up to 25C and 64% humidity but with a few cooler evenings coming and a few more fly screens on the windows enabling us to open them at night we will soon have that back down to 22 to 23C at no cost as we bought the fly screen material last year. As the external humidity drops so will the internal as the house is always much lower than the outside humidity.
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Catweazle



Joined: 17 Feb 2008
Posts: 2530
Location: Little England, over the hills

PostPosted: Thu Aug 13, 2020 3:14 pm    Post subject: Reply with quote

Our external house insulation does a good job of keeping the inside temperatures quite comfortable, although I confess I have no idea what that temperature is. Having walls nearly three feet thick at the bottom helps.

Humidity must be high here, I just washed some floors and they are refusing to dry.
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adam2
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Joined: 02 Jul 2007
Posts: 8005
Location: North Somerset

PostPosted: Thu Aug 13, 2020 4:03 pm    Post subject: Reply with quote

My house stays at a comfortable temperature during brief hot spells due to the great thermal mass of solid stone walls.
In prolonged heatwaves it gets hotter and hotter as the thermal mass slowly warms.

27 degrees at present and 75% RH.
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Catweazle



Joined: 17 Feb 2008
Posts: 2530
Location: Little England, over the hills

PostPosted: Thu Aug 13, 2020 7:42 pm    Post subject: Reply with quote

adam2 wrote:
My house stays at a comfortable temperature during brief hot spells due to the great thermal mass of solid stone walls.
In prolonged heatwaves it gets hotter and hotter as the thermal mass slowly warms.

27 degrees at present and 75% RH.


Our walls are common Pembrokeshire construction = two slate outer walls with clay and rubble filling up the middle, rendered and pebbledashed. In our case 90mm of expanded polystyrene, mesh and render over the top.

It's ugly, we've lost the nice features around the windows, but it's warm.
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