[email protected] wrote:
> ----- Original Message ----- 
> From: "Jeff Barfett"
>   
>> Arild,
>>     
>  The Airhead does take air from the inside and pushes it out via a low 
> volume fan which would
> allow room temperature air to move over the composting compartment.
>
>
> REPLY
> It  just occurred to me that the vent  for such a composting  toilet will 
> require a bit of  additonal engineering.  The interior air will have 
> moisture in it and this will form ice as soon as it exits outdoors. 
> Therefore the exhaust air has to have sufficient velocity  to blow past the 
> vent grille or exit port before it has a chance to freeze and form an ice 
> barrier.
>
> We have the same problem with our bathroom.  Once the snow on the roof gets 
> to be deeper than  24"  it tends to create an ice block  and our drains no 
> longer work.  I have been mulling over  how to solve this. 
Move further south?  ;)
>
>   

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