An Interesting Way To Check The Mositure Content Of Firewood

  • Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.

    We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.

    We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.
  • Super Cedar firestarters 30% discount Use code Hearth2024 Click here
Status
Not open for further replies.

Nonprophet

Minister of Fire
Hearth Supporter
Jan 27, 2009
516
Oregon
Just happened to be looking at the OSU Extension service website and thought I'd see what they had to say about firewood.

I thought this was particularly interesting:

"Weigh a small piece of firewood cut from the middle of a large piece. Record the weight in ounces. Dry the small piece overnight at 200 to 300 degrees in your oven. Weigh it again while it is still warm. The difference in weight is the weight of the water in the wood. Divide the weight of the water by the oven-dry weight in the wood to find the moisture content of your firewood. Wood is ready to burn when the moisture content is less than 20 percent."

At the very least it sure seems like a good way to check the accuracy of my moisture meter.........


NP
 
It works but expensive to run the oven unless of course it's a wood burning cookstove. My mother used to dry wood in the oven often. My father never did figure out the wood seasoning thing.
 
That's freaking ridiculous for regular people. Those goofy oregonians. That method describes how you would determine the water weight in a lab and if all you have is a hammer then everything looks like a nail. I'm a civil engineer and in school we sat many samples of soil in a special little oven overnight to dry out so that we could determine the dry density and then figure out how wet the soil must be to get good compaction. I know the oven that they are using and it's not your normal cooking oven.

Let us know if you try this and compare to the standard HF moisture meter. I used mine this weekend on a pile of fir cut this spring, seems a guy wants to know if it is ready. 22% looks pretty ready to me.
 
I've done this for grins and my own edification, years ago. I weighed the pieces every hour or so until they stopped getting lighter. But I think the "usual" concept of moisture content is to divide the weight of the water by the combined weight of the water and the wood. That way you get a percentage from 0 (completely dry) to approaching 100 (all water).
 
Status
Not open for further replies.