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putting warm air ducting through fireplace fireback

  • 17-11-2016 8:25pm
    #1
    vonny232
    Registered Users, Registered Users 2 Posts: 30 ✭


    Hi folks,

    I have a rather long winded question about how to incorporate excess hot air from a living room stove cavity into a NIBE warm air recycling hot water boiler.

    If anyone is interested, read on, else press the back button :)

    I have a 6kw inset convection stove in my living room which kicks out loads of heat into the living room, and optionally into the kitchen/diner if I leave the connected double doors open.

    I recall seeing (before the stove was install) that fireplace fireback is basically a prefab cavity which a potentially very large fireplace could be fitted.

    Since my stove only takes up around 60% of the total area, there will be a large air cavity where the top and back of the stove is exposed.

    Nevertheless, I suspect that air cavity gets rather hot when the stove is fired up.

    Next, I also have an immersion boiler with a warm air heat exchanger and compressor which takes warm air from the shower rooms and converts it back to warm water for the boiler.

    I was thinking of running a new duct straight through theconcrete cavity and connecting (along with all the other ducting) to the heat-exchanger).

    If there are concerns over carbon monoxide, I could run some kind of coil through the air cavity which the air can pass through.

    My point is I am interesting is harvesting significant warm air from he firepace cavity and feeding it into my heat exchanger, and therefore producing warmer water reducing the need for the compressor to run, reducing the time the immersion needs to turn on.

    If people have got this far, I would be interested in their opinions.

    I need to redecorate the living room, so I am prepared to pull down some plasterboard and run ducting to the closest point where I can connect to the existing air system. is it worth the several hundred € to do the work?

    What u think?


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