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Author Topic: slabs vs good wood  (Read 561 times)

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Offline petefrom bearswamp

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slabs vs good wood
« on: November 27, 2017, 05:53:57 PM »
Just changed over from my summer stoking of semi dry Hemlock slabs to heat domestic water to my 2 yr dried hardwood for winter.
I sit in my hot tub every evening and watch the furnace while soaking. when the slab load came on it took about 15 to 20 minutes to get to temp
tonight with good wood it took 8- 1/2 minutes 28 degrees outside temp.
this is with a 12 yr old classic set at 140 to 150.
also another point I tried to raise the temp back up to my usual setting of 160 to 170 but the computer wont let me change the setting.
I cant legally burn my slabs in a pile anymore in NY so decided to use the classic.
I make more slabs tan the unit can burn darn it.
Kubota 8540 tractor, Farmi winch
Kubota 900 RTV
Polaris 550 Sportsman ATV
1 Husky 1 gas Echo 1 cordless Echo
241 acres of woodland

Offline starmac

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Re: slabs vs good wood
« Reply #1 on: November 27, 2017, 09:44:29 PM »
Quite a bit of difference.
The sawmill here also sells firewood, and cuts and sells the slabs at a cut rate, I do not know how much of them they sell though.
Old LT40HD, old log truck, old MM forklift, and several huskies.

Offline Ianab

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Re: slabs vs good wood
« Reply #2 on: November 27, 2017, 10:35:42 PM »
Semi-dry is likely the difference? DRY sawmill slabs should put out good heat, just that softwood tends to burn pretty fast, so it wont last as long. Of course if you have bark still on the slabs, that's not going to burn as well either.

BTUs per pound are similar for all woods, but of course a denser hardwood has more pounds, so more BTUs.
Weekend warrior, Peterson JP test pilot, Dolmar 7900 and Stihl MS310 saws and  the usual collection of power tools :)


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