Jump to content

Ideal Log Diameter??

Recommended Posts

A given weight of wood can only produce so much energy so while 1 large log split into 2  may last longer than the same log split into 4 pieces , it should only produce the same amount of heat but spread over a longer time.


  • Like 2

Share this post

Link to post
Share on other sites

Yeah but seems to me at least (no proof) the less dense softwood naturally burns faster than the more dense hardwood so to get more similar burn rates (power output) I use larger logs of lighter woods (less surface area) and smaller logs for the more dense wood.

Share this post

Link to post
Share on other sites

you do need turbulance in the firebox to ensure a nice looking fire,   to get that load two or three logs at a time,   size of these logs will depend on your firebox size.


If I am processing logs on a 4 way split then I want a length on the outer (bark) edge of the triangle to be no more than 150mm.,  so about 600mm max circumstance cord split 4 ways. 


Length wise cut the width of your firebox less 50mm,   if cutting to resell 250mm will suit most stoves.


Share this post

Link to post
Share on other sites

I remember seeing something online around 12 years ago where the University of Bristol had worked out 4" is around the optimum diameter for a log.

I don't remember what the rest of the parameters were though. Slow burn, fast burn...

I tend to like a slightly smaller log. Maybe around 3" diameter. I often split existing logs again to build the fire up again if it's a bit slow or just chuck a bit of kindling in.

  • Like 1

Share this post

Link to post
Share on other sites

I do find picking up logs abt 4" is abt right. Anything bigger is an effort.......... K

Edited by Khriss
@Danny Boy probly balance between sapwood and heartwood...

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Featured Adverts

  • Tip site reviews


Arbtalk.co.uk is a hub for the arboriculture industry in the UK.  
If you're just starting out and you need business, equipment, tech or training support you're in the right place.  If you've done it, made it, got a van load of oily t-shirts and have decided to give something back by sharing your knowledge or wisdom,  then you're welcome too.
If you would like to contribute to making this industry more effective and safe then welcome.
Just like a living tree, it'll always be a work in progress.
Please have a look around, sign up, share and contribute the best you have.

See you inside.

The Arbtalk Team

Follow us

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.