log burner not producing much heat?

[Paul Smith]

Has this happened since you had the fire bricks out? Check the top baffle, are the lugs sitting on the fire brick?

[muttley9050]

If you've got a metal retro fitted liner,you cant insulate it,only concrete liners can be insulated whilst stackis being built, this willonly help with draw when cold anyway.

Sounds to me that its thebaffle for sure. heat going straight up chimney

[Dean Lofthouse]

Try bone dry wood first like pallet wood or any wood you know for sure as a very low moisture content, that way you can rule out the obvious first. Those symptoms are damp wood, rule it out for definate before ripping things apart or spending more money

[predator]

how bigs your room and why have a flue pipe as that could cause problems my good friend had lots of trouble keeping fire going no draw etc and he found out that the flue pipe had been re used from when it had a gas fire fitted etc and all the flyash had settled in the flue pipe as it was routed from fire and then was sitting at 90 degrees in the chimney causing ash to settle in the flue liner he just ripped the liner out as the chimney was in good health ps he had a massive draw afterwards lovley warm fire now for last 2 years hope you get it sorted soon and you will good luck

[Farmer Tom]

Might seem a bit odd, but I presume you're not expecting to get 5kW out of a 5kW multifuel stove.

Those figures are normally based upon burning anthracite,

so burning wood would give say 2.5-3 kW?

My Aarrow stove (Stratford 90) actually says ( from memory) 30kW burning Anthracite.

 

Also with wood at approx. 3.5-4 kWh per kilogram,

a sustained 5kW would require you to be burning just under 2 kg per hour.

[muttley9050]

Just remember its easy to take a liner out,but harder to put it back, if its a new liner it should be fine, if you go down the removing route,that i wouldnt recommend,be sure to check the overall condition of stack first.

[roglog]

it has always been like it, ive had it about 6 weeks now.

even when its been burning for an hour plus and looks to be burning well it does not seem to heat the room, its 12' x 16'.

[slack ma girdle]

Is your stove a multi burner- two vents or single fuel- one vent ?

Are you using the right vent ?

 

Top vent for wood, and bottom vent for coal.

[Paul Smith]

Yes you can insulate a retrofit liner. Take the bird cage off and it should be attached to the liner with a jubilee clip. Pour vermiculite down the sides making sure non goes down the liner. Keep moving the liner to get the insulation to fill the voids until you can get no more in. Replace the bird cage.

[Paul Smith]

Top vent is an air wash for the glass bottom vent is the primary air intake.