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Sunday 25th 31F/-1C [5.15] Overcast. About 1cm of overnight snow. Possible snow showers. A snowstorm warning has been released! Up to 20cm over the next 48 hours with strong NE winds.
62.6F/17C in the room. Has the curtain stair enclosure reduced heat loss to the upstairs? It would seem so. The last two mornings were 3F cooler with the same outside temperature. Perhaps the room will cool further by normal breakfast time.
I got up at 5am after being awake for two hours. I was too hot under the heavier duvet! 🙄
7.15 The room sank to just under 62F/16.7C before I lit the stove. That is still a 3F reduction in heat loss compared to the rather chilly, 59F of the last two mornings. The curtains I used to close off the open stairwell were really quite thin. Multiple thicknesses might reduce heat loss further. Still at very low cost and effort for this first experiment.
Appearance is obviously important in the longer term. Not that I get many visitors but for my own visual benefit. I don't want a huge eyesore in the room!
This new thermal image [top right] is interesting. This is before the stove has warmed the room at all. In fact it has only just been lit. There is almost no stratification on the stair curtains. While the massive chimney is still holding heat from last night. [Just out of view to the left] Though the heat has spread to the adjoining, brick wall.
The cold glass of the door to the entrance hall, on the right of the image, could usefully be insulated. The entrance door itself is solid pine board. Poorly insulated and draught sealed. It has had white frost on the inside surface in cold winters! I have long planned to replace it. With a properly insulated door faced with grooved plywood. Probably home made. An air lock porch has also been long planned but never progressed.
The second image shows the chimney [65cm square] before the stove has properly warmed up. It is clear that it stores a lot of heat and releases it steadily to the room. Thermal mass at its best. Since it costs nothing. The stove surroundings are ceramic tiles and these also get warm to thanks to the stove. So a very large area radiates heat into the room. Once it has stored the heat coming from the stove.
It is not exactly free heat. Because the stove's output is partially stored. Instead of heating the room directly. The benefit is, of course, a much longer heating period for the same input of wood. The same is true for the very expensive soapstone cladding on the stove itself. Intended to prolong the benefits of the stove long after it has gone out. It can often feel warm in the morning.
Much is made of mass stoves or mass ovens efficiency. Where a small burn can provide heat for days. The cost is twofold. A literally massive structure in the room. Somebody knowledgeable has to build it.
The
third image shows the area around the stove is already warming the
surrounding walls. With the stove cladding yet to take up the heat.
The chimney upstairs radiates heat to the attic. Though I was never really aware of it. Even though our bedheads were right beside it for three decades. I only discovered all of this after I invested in the Topdon thermal camera. A plug in attachment for mobile phones. It cost about £200 equivalent. Competitors are now available.
The advantage of these infra red sensitive cameras is that one can see at a glance where heat is being lost. They can also be used to check for electrical faults and poor building standards. Images are easily captured as they are stored on the phone. So a permanent record exists.
9.10 I couldn't stay awake. So I had a half hour nap. Very fine snow is falling. This doesn't help my need for more logs! I have more than enough for today. I have brought in all the remaining logs in the greenhouse.
16.00 31F/-0.6C. 65F/18.3C in the room. I can't be certain but it felt cooler. When I went upstairs to hang up some laundry.
I have taken the recycling bin along the drive. The snow made it far easier than usual. To see where I was going in the dark.
20.00 32F/0C. 67F/19.4C! This is ridiculous! I am sitting here and sweating in a T-shirt!
Dinner was cheese on toast. I was a bit mean with the grated cheese.
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