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Ventilation Lesson 1: Principles of Air Flow & Moisture Control

Learn the principles of air flow and moisture control in agricultural structures with Mr. Dieckhoff. Explore ventilation techniques in dairy barns, poultry barns, horse stalls, and shops. Discover how heat transfers and ways to combat it through insulation and window treatments. Understand the concepts of BTU, dew point, R-value, and preventing heat transfer. Test your knowledge with a True/False quiz on heat transfer methods. Enhance your understanding of conduction, convection, radiation, and energy-efficient windows.

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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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