Wood heaters, eh?
In the month I’ve been living here in the Cottage I’ve developed a complicated relationship with mine.
I’ve learnt, now, how to get a decent blaze going with minimal fuss and there’s little nicer than curling up in front of a toasty fire on a cold night, glass of red in hand. The heat it produces is lovely, and when it’s working properly I can set it before bed and the house will stay toasty warm all night. Poking and prodding the fire into cooperation is fun and it’s immensely satisfying to get a good burn going on a cold night.
It’s less fun, however, on nights like tonight when the weather’s foul and I work late, and at 9 pm it’s still a little chilly even with the fire going. It’s been raining all day so the firewood is damp and the baffle plate on the flue has bent (yet again), jamming the flue wide open and significantly reducing the efficiency of my burn and heat transfer.
Heh, a month ago I had no idea what a baffle plate was, let alone what it did. I’d not spared much thought to wood moisture content or burn efficiency, and I’d never considered the price of firewood by the tonne (between $150 and $200, for the curious).
I still feel a little guilty about lighting the fire. In a State where my power is hydro-electric (not exactly environmentally benevolent, but a darn sight better than coal), lighting the fire is both less efficient (in terms of energy cost by yield) and generates a lot more emissions (CO2 and particulate emissions) than using electric heating.
On top of that, the wood I’m burning has to come from somewhere. The current fuel for my fire comes from a beautiful old eucalypt tree that had to be felled over at the House of the Gumtrees (mmm, free firewood!), however my ex-landlord only let me take what I could fit in my Corolla (a surprisingly large amount when you’re determined…) and I’m about to run out. Firewood sales in Tasmania are unregulated, with many sellers setting up trucks on the roadside with cheap loads for sale. Problem is you don’t know where that wood has come from or what condition it’s in:
- Is is green, wet or rotten?
- Was it illegally taken from State Forests, National Parks or trespassing on private land?
- Were old hollowed trees felled that provide important habitat for wildlife (including several endangered species)?
And that’s without considering if it’s actually the tonnage they’re saying it is!
There’s no hiding from the truth: the wood heater is not an environmentally friendly way to heat my home! It’s what I’ve got, however, so it’s up to me to make the best of it.
I’ve been researching wood heaters and firewood recently and I’ve learnt that:
- The moisture content of your timber needs to be below 25% for an efficient burn.
- Burning green or wet timber increases particulate emissions (as well as being much less efficient).
- Even stored under cover, firewood has an amazing capacity to absorb moisture on rainy days.
- Burning pine needles is fun.
- Baffle plates significantly improve the heat exchange from your wood heater (and having it bend and jam open – again – is a bad thing. *sigh*).
- Burning old painted fence posts is an environmental no-no, no matter how much free timber it is or how much your lovely new neighbours assure you it’ll be ok.
- Accidentally throwing in an envelope with a plastic window results in noxious fumes: don’t do it.
- You can’t add the ash and charcoal to your compost, but a small amount mixed with other things is ok in mulch.
- There’s no regulation of the firewood industry in Australia, and there are a lot of dodgy vendors in Hobart (if the internet is to be believed)
- There is a voluntary industry code of practice that sets out standards that wood will be sustainably harvested, in accordance with all laws and protective orders, stored correctly and sold with moisture contents below 25%, with weighbridge tickets provided.
- There is one supplier in the whole of Tasmania who is signatory to the voluntary code, and they’ll deliver to my suburb.
- The cold metal of my bed frame is very nice to rest my blistered skin on when I inevitably burn myself on the wood heater door/frame/handle
- So. Many. Splinters.
So, after a little research and environmental guilt I’ve come to the following positions:
- The wood heater only gets lit if (1) the temperature is below 10oC and (2) I’m going to be home all night (no fire on taiko training nights!)
- Use discarded newspaper from work and household waste (loo rolls, paperwork from the last lease, letters from politicians) to get the fire started
- Pay the extra to buy firewood from the lone code signatory supplier; it’s not that much more than other suppliers and I know it’s as ethically sound as I’m going to get.
- Keep my garden prunings to burn next winter: at least the damn invasive vine I cut down will be useful!
- When the fire’s lit, actively enjoy it.
Hence I’m writing this sitting on my couch, watching the flames over the top of my monitor instead of working with the lap-top docked in the study. If I’m going to commit environmental crimes in the name of keeping warm I may as well keep the most of it, and once Winter properly arrives and the fire is going during the day on weekends I intend to try my hand at cooking on the coals. I’m thinking coal-roasted foil-wrapped eggplant (that’s aubergine for the northern-hemispherians) is going to be a beautiful thing. Baba ganoush for all!
This weekend I’m going to buy my first load of firewood and spend far too much time hauling and stacking the stuff in the little space under the house, and I’ll be talking to my landlord about getting that warped baffle plate replaced this time instead of another attempt at repair. Right now though I’m going to finish this post then put another piece of tree on the fire, sit back and watch the flames while I finish the glass of red that’s mysteriously appeared in front of me.
Have you ever lived with a wood heater or fireplace? Got any firey tips for this recovered teenage pyromaniac?
Come sit with me and tell me all about it. There’s enough red wine to share and though my couch may be fat and bulky it’s pretty comfy.