Heating an old house (by alaric)

Sarah feels the cold keenly, while I can usually just put on some more warm clothes to deal with British winters. But even I was finding it hard to work in my home office when the temperature went below ten Celcius; fingerless gloves still let me type, but numb fingers increase my error rate, and the pain is distracting.

Part of the problem was that our house is draughty. There were a lot of gaps in the window and door frames, through which daylight could be seen; when it was windy and rainy at the same time, the wind blew rain in through the frame of the large window in my office.

So step one was to fix these. The large office window, it turns out, is somewhat curved, so when my brother in law was visiting, we screwed extra handles to it, pulled it properly closed with levers wedged in the handles, then did up the bolts at top and bottom to force it to stay in shape, which fixed a large source of draughts.

Then I want around a few other choice places, adding draught excluder strips where I could.

Next challenge was to increase the heat. We had only one real source of heat in the house, a wood/coal burning stove at one end of the house. Since it's a long thin house, this was little help for me in my office, right at the opposite end - but it didn't even make enough heat to keep Sarah happy sitting next to it, so she would often use the expensive electric fan heater to keep her temperature up, much to my concern (for if we can't pay the electricity bill, things will quickly become rather unpleasant).

Now, the grate in this fire was rather small compared to the size of the fire itself. The grate had only sides and a front, so had to be pushed back against the firebricks in order to not spill coal out. This meant that air coming in through the vents would tend to rise over the fire and up the chimney, taking heat away without imparting much oxygen to it. Even then, it would slowly wriggle forwards over time, spilling ash and coal down behind, until it came too far forwards for the ash shovel to be pushed underneath it, meaning the fire would choke itself. But as it moved forward, the effective volume fire increased, with a notable improvement in the heat output - even though the fire at the back would be starved of air from beneath, as it sat on a bed of ashes.

While rummaging through piles of random bits of metal lurking about the place from when we moved in, though, I found an iron grating that I suspected might be able to fit in behind the existing grate, enlarging it. Sure enough, it did - and it fitted so perfectly well that I suspect it was actually meant for it. Suddenly it was possible to have a large bed of coal in the fire, with air coming in through the vents from underneath it and being drawn up through; this led to an awesome increase in heat. However, it led back to the same old problem - we now didn't have room to get the ash shovel in underneath to take ash away. And so the fire would slowly choke itself with ash.

So I ordered two metres of 25mm square hot-rolled mild steel from Hindleys, my favourite home-engineering supply house. When it arrived I used my angle grinder to chop off two lengths of the stuff, then used them as spacers on either side of the grate to lift it up an extra inch.

And now the fire's awesome. I can easily get it so hot that it becomes mildly terrifying, an angry yellow glow emanating from the air vents as it roars away, the radiated heat unpleasant to be too near. A few days ago, it actually melted the plastic crates we store our newspaper and kindling in, purely by radiation.

But it's still rather cold in my office.

So we decided to spend some money on the problem, as it was in danger of harming my work. I went down to John Stayte Services, a local purveyor of awesome things. We buy our coal from them, but they also sell propane, butane, related accessories such as heaters and Sievert torches, workwear, and animal feed. To my delight, they had a deal on; a shipment of gas heaters had been damaged due to the shipping container being broken into by illegal immigrants who built a home on top of them for the duration of the voyage... so they were selling a slightly dented heater, along with a cylinder of butane, for £89 when normally a heater alone would cost more than that (and a gas cylinder £50 or so as an initial outlay).

I set it up in my office, lit it... and over the next few hours, the temperature rose from ten degrees to about twenty, with me correspondingly shedding layers of clothing. Since then I've been running the heater on low power, and the temperature's stayed around seventeen degrees; with the stones of the building having been warmed up, it's now not taking much heat to keep it nice and warm.

And so, I can proudly state, for the first time since we moved in, it's actually warm enough at home that we are turning down heat sources so as not to be too hot!

1 Comment

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  By natural convectors, Tue 23rd Feb 2010 @ 9:21 am

  Thats great to hear! We are currently extending an old cottage so we are looking for different heat sources that are effiecent and cheap

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