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  1. #1
    Thailand Expat
    dirtydog's Avatar
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    Roof Ventilation questions and answers

    Roof Ventilators - A Comparison Study of
    Rotary/Turbine to Condor Kinetic

    Rotary/Turbine Type

    Commercially developed in the United States in early 1900s to remove welding fumes in factories during the winter months. This is a predominantly winter ventilator.

    Mode of Operation
    Wind Driven
    Rotary/turbine ventilator uses wind energy as it's governing mode of operation.

    Initial Conclusion
    Rotary/turbine can best be referred as a Winter/Wind ventilatoras it's efficiency is governed by wind speed which is predominant in the Autumn, Winter and Spring months, particularly at the change of seasons.
    Highest efficiency according to wind velocity.

    Rotary type will move a fixed volume of air (irrespective of temperature or season) dictated by wind velocity.

    Where no free air (replacement volume) is available
    Rotary/turbine type is dictated by availability of a replacement volume (free air).
    Rotary/turbine type cannot displace what cannot be replaced.

    Performance during cooler months
    Rotary/turbine unit is suited to this period, however is deemed detrimental in residential applications as dry warmer air in roof is removed and replaced with ambient which has greater moisture levels.

    Performance during warmer months
    Rotary/ turbine type is not suited to this period. When no wind movement is available, the only way hot air can escape is by having to overcome the resistance created by the turbine rotor. It is therefore less efficient than a simple open unobstructed hole in the roof.
    Multiple units are often required.

    Re - Maintenance
    Rotary/turbine type will require periodical maintenance and is inclined to be noisy.

    Summary
    There are no similarities between the two types as can be clearly observed.
    The principles governing the mode of operation between the two products are almost total opposites.
    Their selection as to purpose and use is dependent entirely on the task they are expected to perform.




    Condor Kinetic Type

    Initial product patent in Australia in late 1980s for removal of heat from buildings. This is a heat and pressure driven roof ventilator designed for summer conditions.

    Mode of Operation
    Heat & Pressure
    Motionless Condor Kinetic type is designed to use air pressure and heat load as it's governingmode of operation with wind assistance.

    Initial Conclusion
    Motionless Condor type can best be referred as a Summer/heat ventilator as it's efficiency is governed by heat pressure and internal thermal values along with external pressures.
    Highest efficiency during Summer months according to temperature.

    Motionless Condor Kinetic type will move a high volume during the Summer and low volume during Winter.
    The Condor type is unsurpassed in zero wind velocity

    Where no free air (replacement volume) is available
    Condor Kinetic type is able to offer air volume exchange as dictated by pressure fluctuations both internal and external of the building. Put simply the Condor type allows the building to breathe in and out.

    Performance during cooler months
    Condor Kinetic mode of operation is not totally suited to this period. It is however, ideal in residential / institutional situations to ensure the dry air is not removed from roof cavity and replaced with external moist ambient.

    Performance during warmer months
    Condor Kinetic type was designed for and is well suited to this period. Distinct advantage in that only one correctly sized Condor is required for a conventional residential roof, either tile or steel.

    Only one correctly sized unit is recommended for residential dwellings.

    Re - Maintenance
    Condor Kinetic type requires no maintenance and isnoise free.

    Fire Risk Areas

    Research Study conducted by Industrial Design Company Man Made Pty Ltd.

    Condor Vent



    CPAC Monier PIPE VENT TILE SET and
    CPAC Monier PIPE VENT ROUND RIDGE SET

    Prevent leakage, require no alteration to the roof.
    Outstanding Features

    CPAC Monier PIPE VENT TILE SETS and CPAC Monier PIPE VENT ROUND RIDGE SETS support the installation of various types of equipment on CPAC Monier roofs, such as TV antenna, ventilation pipes, pipes for solar-powered water heaters, lightning rods, and other round conduits that require access to the roof without piercing or damaging it. These CPAC Monier accessories enhance the attractiveness of any roof, increase convenience and ease of use, and effectively prevent leakage.






    Characteristics
    • One CPAC Monier PIPE VENT TILE SET consists of one CPAC Monier PIPE VENT TILE and one CPAC Monier ELASTOMER SLEEVE. A full range of CPAC Monier standard colours and profiles is available.
    • One CPAC Monier PIPE VENT ROUND RIDGE SET consists of one CPAC Monier PIPE VENT ROUND RIDGE and one CPAC Monier ELASTOMER SLEEVE. A full range of CPAC Monier standard colours and profiles is available.
    Last edited by dirtydog; 13-12-2007 at 11:50 AM.

  2. #2
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    WhiteLotusLane's Avatar
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    I like the last one.. Could something like that be installed also when you dont have a CPAC roof? (or don't know what brand of tiles are on there)

    ANd would they work as well as the wind turbine thingy? My wife doesn't want one of those on the house.

  3. #3
    Thailand Expat
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    It seems that the wind turbine ones may not be that effective for Thailand. Or at least not as effective as the second one.

  4. #4
    Days Work Done! Norton's Avatar
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    Have used both and found the turbine one to work the best if you live in an area with a constant breeze but they are a little large. The CPAC version can be installed on just about any roof surface with a little modification. Air vent pipes are common so you will be able to find one much cheaper than CPAC as you won't need the roof tiles.
    Whenever you find yourself on the side of the majority, it is time to pause and reflect.

  5. #5
    Member BKKBILL's Avatar
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    Good information DD. It certainly makes sense getting that heat out of the attic space. Just touch your ceiling it the afternoon will tell you how much there is. Heated air can move at quite a velocity. There are experimental electrical generators that just use sun heated air to produce electricity with a turbine. Seems to me the higher up on the roof the vent is the more efficient it would be.

  6. #6
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    Looking for information on purchasing those cpac vent roofing tiles. I could use up to 6 set for my home in Chiang Mai.
    Your reply would be appreciated.

  7. #7
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    Klondyke's Avatar
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    Quote Originally Posted by David Figueira
    Looking for information on purchasing those cpac vent roofing tiles. I could use up to 6 set for my home in Chiang Mai.
    Your reply would be appreciated.
    The road up to HangDong from Airport intersection, on the right hand side there are few blower shops with all the accessories.

  8. #8
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    Thanks I'll see if I can find them.

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