We have a multi fuel stove with back boiler. We also have additional combi boiler which is used for water and radiators so back boiler is just a bonus. The stove is a large Dovre 2000 which should give enough heat for the large living area (open to beams). Chimney maintained and correct fuel used yet we barely get any heat. We were wondering whether the back boiler was taking some of the energy from the stove. Can anyone help?
Does a back boiler on multi fuel stove reduce energy of stov
- Thread starter JoSweeney
- Start date
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On a well designed stove the boiler addition will increase the energy harvest and the efficiency.
Big stoves can tend to run cooler therefore less efficient.
A gravity circuit is important coupled with hi-lo stats.
But yes, the boiler is "taking" energy from the stove. Thats its job.
Big stoves can tend to run cooler therefore less efficient.
A gravity circuit is important coupled with hi-lo stats.
But yes, the boiler is "taking" energy from the stove. Thats its job.
Norcon is right the back boiler will take away some heat if it is connected to your central heating system, however it will be given out of the radiators so not wasted.
however i think you are thinking this will be reason why its not kicking out the 11KW of heat it should be!
If you are not used to stoves, the fuel you are using and how you operate the stove are extremely important.
The manufacturer rated output is nearly always for coal as this will give out more heat.
When burning logs, the surface area of the logs is important, big whole logs burn longer but less heat, smaller split logs burn hotter but quicker.
Also psychologically the stove will be 'giving out more heat' with the door open because of the radiant heat, but will infact make the room cooler than if its shut as it will draw more air from the room straight up the chimney.
controlling the flame you are getting off the logs is the most important thing of all, having the damper full open to start the fire off is fine, but you need to get the flame to a nice steady state to get maximum heat out!!
however i think you are thinking this will be reason why its not kicking out the 11KW of heat it should be!
If you are not used to stoves, the fuel you are using and how you operate the stove are extremely important.
The manufacturer rated output is nearly always for coal as this will give out more heat.
When burning logs, the surface area of the logs is important, big whole logs burn longer but less heat, smaller split logs burn hotter but quicker.
Also psychologically the stove will be 'giving out more heat' with the door open because of the radiant heat, but will infact make the room cooler than if its shut as it will draw more air from the room straight up the chimney.
controlling the flame you are getting off the logs is the most important thing of all, having the damper full open to start the fire off is fine, but you need to get the flame to a nice steady state to get maximum heat out!!
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You mentioned the damper. That is another query we had. When we moved in the damper was broken. When we had someone out to look at the chimney he removed it as it would make the fire unsafe. So does this mean that heat could also be escaping straight up the chimney?
when its not in use a stove its not as bad as an open fire for the amount of heat lost up the chimney. (so long as the doors are shut)
the damper i was referring to is the little vents at the bottom of the stove, these regulate the air flow to the fire.
it takes a while to master where these should be set, but as a rule you have them fully open to get the fire started, somewhere between closed and open for normal operation to get max heat out, and closed (or nearly closed on some) for overnight to keep a log burning over night ready for the morning.
as i was trying to explain in previous post, most people think you get most heat out of a fire with these vents fully open so max air to the fire, but this is not true.
when its burning like this more energy is being wasted straight up the chimney!
the damper i was referring to is the little vents at the bottom of the stove, these regulate the air flow to the fire.
it takes a while to master where these should be set, but as a rule you have them fully open to get the fire started, somewhere between closed and open for normal operation to get max heat out, and closed (or nearly closed on some) for overnight to keep a log burning over night ready for the morning.
as i was trying to explain in previous post, most people think you get most heat out of a fire with these vents fully open so max air to the fire, but this is not true.
when its burning like this more energy is being wasted straight up the chimney!
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