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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.
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General: Hot Air

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  1.  
    • CommentAuthoralbacore
    • CommentTimeOct 15th 2007
     
    Does a heat recovery ventilation system have to compensate for the fact that hot air rises? The systems I have looked at all deliver the warm fresh air at ceiling level. Is the flow-rate sufficient to even out the temperature or does living with the system mean warm ears and cold feet? As even ears (for some of us at least) are considerably below ceiling height, does that mean there is a lot of unused warmer air at ceiling level?

    Any views on what it is like to live with one of these systems from someone who has done so would be very welcome.
  2.  
    The system we have has the extractor vents at ceiling level. The fresh air stream is delivered to the return air ducts of the main forced-air heating system and hence comes out at ground level in the rooms where the vents are in the floor. The system works very well and we never have condensation, even on the coldest days in winter when the outside temperature may be as low as -28C. However, in winter, the main forced-air heating system is running and there is little stratification anyway so we don't have hot heads and cold feet.

    Paul in Montreal.

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