Hammelsvang Trading


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Faromor Max Air



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Natural ventilation



Natural ventilation, works by replacing stale barn air with fresh outside air. In the winter, the barn might be only slightly warmer than outside, but as cold air enters the barn, it expands as it warms up, giving it the ability to hold more moisture. The outside air mixes with the inside air, absorbs the moisture and gases and then has to be removed from the barn.


Summer ventilation

Natural ventilation relies on the natural forces of wind and the thermal properties of air to function properly. Design the natural ventilation system to work in a cross-flow mode in the summer. Orient the barn perpendicular to the summer winds so that they can blow across the narrowest cross-section of the barn. Locate the barn so that the winds are not restricted by other buildings from reaching the barn. Ensure parallel buildings are at least 30.5 m (100 ft) apart. Any adjacent buildings will cause a downwind effect at a distance of 10 times their height.


Winter ventilation

In the winter, the barn ventilates naturally because of thermal buoyancy. Heat produced from the cows will cause the air to rise, drawing in fresh air and exhausting it through ventilation openings at the ridge. Winds blowing over the ridge of the barn will work to draw air out.


Spring and fall ventilation

In the spring and fall, ventilation works as a result of a combination of cross-flow and thermal buoyancy. Inlets and exhaust have to be adjusted to make use of the wind and the natural tendency for heated air to rise.



Natural ventilation consists of:



Curtains or Panels:

For air intake the sidewall will be open. We have curtain up to 4 m high. By higher openings we can offer our split curtain. With a split curtain, the bottom portion remains closed in the cold weather, and only the top is adjusted. This allows for less wear and tear on the curtain and less strain on the controls. In warm weather, the bottom curtain is rolled up, and the entire sidewall is open.


We have both rolling curtain and folding curtain.


In some cases, our panels, either SolarVu or ClearVu panels will be better solution. This can be in very cold areas or in transport corridors from the barn to the milking parlor room and in the milking parlor room.


Our panels are very tight and have high insulation value.


Both curtains and panels can be ither manual or automated operated.


Chimneys:

For air out take we use chimneys. chimneys are a good option when some control over the inside environment is desired. Because of the rain cap they will reduce the amount of rain or snow entering a barn while still providing good ventilation.


Our chimneys are equipped with a damper, which can be used to control the outflow of air. The damper doesn't fit tight and has about a 2.5-cm (1-in.) gap around it, so even when closed it will allow for minimum ventilation. Dampers do not have to be adjusted daily but should be adjusted seasonally.


Our chimneys are available in 3 dimensions, 610 x 610 mm, 760 x 760 mm and 915 x 915 mm.


Skylite:

In combination with our chimneys, we offer our Skylite.

This is a lexan plate mounted in the ridge to allow natural light to enter the barn.

This helps with a nice environment for both the animals and the people working in the barn.



Hammelsvang Trading



Ulrik Hammelsvang Andersen

Owner & Agent for Canarm and more


CVR. NO. 41522933



Contact



uha@hammelsvangtrading.com

+45 61 61 16 39



Location



Agro Food Park 15

8200 Aarhus N

Denmark