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Ventilation Lesson 1: Principles of Air Flow & Moisture Control

Ventilation Lesson 1: Principles of Air Flow & Moisture Control. Ag Structures – Mr. Dieckhoff. Air Flow in a Dairy Barn. https://www.youtube.com/watch?v=Iaq-s9ZmrN0. Ventilation in Poultry Barn. https://www.youtube.com/watch?v=xyn2RwpS4Vs. Ventilation in Horse Stalls.

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Ventilation Lesson 1: Principles of Air Flow & Moisture Control

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  1. VentilationLesson 1: Principles of Air Flow & Moisture Control Ag Structures – Mr. Dieckhoff

  2. Air Flow in a Dairy Barn https://www.youtube.com/watch?v=Iaq-s9ZmrN0

  3. Ventilation in Poultry Barn https://www.youtube.com/watch?v=xyn2RwpS4Vs

  4. Ventilation in Horse Stalls https://www.youtube.com/watch?v=O4oPQdhMUII

  5. Ventilation in a Shop https://www.youtube.com/watch?v=f2U4pdqN4d8

  6. Heat Transfer • Heat always moves from warm areas toward cold areas .

  7. How to Combat Heat Transfer • Insulation is typically placed in the walls, floors, and ceilings that surround the working areas of an enclosed structure.

  8. Heat Transfer Methods

  9. How Heat is measured • A Btu is the quantity of heat required to raise the temperature of 1 lb of pure water 1°F at or near the temperature of maximum density of water (39°F).

  10. Dew Point • Moisture is always present in the air, although it is usually not visible to the naked eye. • The dew point is the temperature at which condensation occurs. • Condensation must be prevented in all structures because it can lead to hidden problems such as mold, insect damage, and weakening of wooden strength members.

  11. R-Value • the capacity of an insulating material to resist heat flow. The higher the R-value, the greater the insulating power

  12. Preventing Heat Transfer • Air infiltration to a building is prevented by installing caulking, weather stripping, or door bottom seals.

  13. Preventing Heat Transfer • Multiple-pane windows can have two or more panes of glass and are used to reduce heat loss within a structure.

  14. Preventing Heat Transfer • Gas-filled windows are three to four times more energy efficient than standard multiple-pane windows.

  15. Preventing Heat Transfer

  16. Review • Heat Transfer • Conduction, Convection, Radiation • BTU • Dew Point • R-Value

  17. True/False Quiz (14 points – 2 pts ea) • The three methods by which heat transfer occurs are conduction, convection, and radiation. • Convection is the direct transmission of heat by invisible waves similar to light waves. • Insulation materials protect a building from losing heat or coolness by any method of heat transfer. • Heat is measured in British thermal units (Btu). • Moisture is always present in the air, although it is usually not visible to the naked eye. • Condensation must be prevented in all structures because it can lead to hidden problems such as mold, insect damage, and weakening of wooden strength members. • Glass-filled windows are three to four times more energy efficient than standard multiple-pane windows.

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