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Small Shower Room Ventilation.

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I was talking to a developer this morning. His son is a sparks. The two have installed a new 4 inch ceiling fan in a small upstairs shower room that has no windows. The building roof has been renewed recently and new breathable "felt" installed under the tiles. I had previously mentioned that the roofers could install a new roof vent for the fan ducting, but nothing has been done about this.


The developer says that the son advises terminating the air duct in the loft onto a bucket to catch moisture, which I said was not acceptable.


Bearing in mind that the new roofing "felt" (membrane) is breathable, is there any reason these days not to terminate the air duct directly into the loft space with no external grille?


Z.
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  • 0
    Sparkingchip:

    Having core drill a 4” hole through the wall and having installed the fan the bathroom fitter asked why I don’t use a “box” like the other electricians.

    https://www.toolstation.com/tumble-dryer-condensing-kit/p65417


    Snake oil!


    I don't know how much water might be in a full tumble drier, but I assume that it could be of the order of hundreds of ml. Does it fit in the box?


    How does the water condense? Is the box cooled?


    AFAIK, in a condensing tumble drier, the outgoing warm moist air passes through a heat exchanger so that the incoming air is heated somewhat. At the same time, the cool incoming air causes the water vapour to condense after which it is either pumped into a reservoir, or expelled down a drain. The benefit is twofold: first, less electricity is used; second, the room does not overheat.


    This kit strikes me as being about as useless as those freestanding air conditioners which allegedly remove the heat from the air by turning it into water.


    ETA: the "best" modern tumble driers use heat pumps to heat the incoming air. I gather that they take ages and ages to dry the clothes.


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  • 0
    Sparkingchip:

    Having core drill a 4” hole through the wall and having installed the fan the bathroom fitter asked why I don’t use a “box” like the other electricians.

    https://www.toolstation.com/tumble-dryer-condensing-kit/p65417


    Snake oil!


    I don't know how much water might be in a full tumble drier, but I assume that it could be of the order of hundreds of ml. Does it fit in the box?


    How does the water condense? Is the box cooled?


    AFAIK, in a condensing tumble drier, the outgoing warm moist air passes through a heat exchanger so that the incoming air is heated somewhat. At the same time, the cool incoming air causes the water vapour to condense after which it is either pumped into a reservoir, or expelled down a drain. The benefit is twofold: first, less electricity is used; second, the room does not overheat.


    This kit strikes me as being about as useless as those freestanding air conditioners which allegedly remove the heat from the air by turning it into water.


    ETA: the "best" modern tumble driers use heat pumps to heat the incoming air. I gather that they take ages and ages to dry the clothes.


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