Deriving The Formula For The Area Of A Circle Kennel Ventilation – Supply and Exhaust

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Kennel Ventilation – Supply and Exhaust

Proper ventilation can reduce or eliminate odors, reduce the build-up of bacteria, and help maintain a fresh, clean smell in the kennel. Your pets will be happier and you’ll spend less time trying to dry floors and eliminate odors. If you have trouble understanding the information in this article, email us at Sun Hill Pet Supplies.

Regardless of the size of your facility, ventilation will play a key role in the first impression of visitors to the kennel. Obviously, ventilation is controlled, air movement is ordered.

Design basics:

  1. Air exchange: change all the air in the room four to six times an hour. Calculate the room volume in cubic feet, multiply the result by four, five or six, then divide by sixty to get the air volume, in cfm (cubic feet per minute).
  2. Issue take notes: many kennel odors are created at the same level as the dogs so place your exhaust points less than 30 inches to ensure that the odors are drawn down, away from your nose. However, it should not be less than twelve inches from the floor to prevent cleaning water from entering the ventilation system.
  3. How many exhaust points do you have?: Multiple points throughout the room ensure the air flow has a chance to circulate properly. Remember we’re not talking about the return air duct to your heating system, we’re talking about the exhaust vents to remove air from the room.
  4. Provide air: Install your air supply vents, at the top of the room. This allows the air to flow down to the exhaust where it picks up the notes, thereby drawing odors down, and away from your nose. Remember, the supply air must be filtered and cooled, (heated or cooled), not raw outdoor air. Your HVAC contractor can install a unit that supplies enough fresh air to the ventilation system to meet supply requirements.
  5. Air supply and exhaust locations: Set up aisle supply points and exhaust points behind the walls or as pipes down the walls. If the heating source is a “hot air” system, have one third of the hot air brought in through the floor and two thirds delivered through the corners across the street.
  6. Type and design of exhaust fan: You will want to use a centrifugal wheel blower as the air conditioner. Fans and blowers that use a blade like that of a window fan will not be able to overcome the static pressure created by the ductwork required at many pick-up points.
  7. The size of the blow: Do a safety factor by multiplying the cfm you calculated in step #1, by 1.5 to make sure you’re moving enough air, then choose an exhaust blower to deliver that cfm amount to ½” of static pressure or more. Static pressure resists air flow. , usually created by a duct system.
  8. Pipe size: A high air velocity in the system will ensure good air flow so the size of the pipes is about 2000 fpm (feet per minute) air velocity. The easiest way to size is to determine the size of duct needed to handle the total air flow, then install that size as the first duct, throughout the building. Determine the number of drops you need and divide the area of ​​the primary duct by the number of drops. Each droplet is therefore measured in this area. Use this formula to determine the main pipe size: (cfm / 1500fpm) x 144 = pipe area in square inches

Formula information: · http://www.Grainger.com is a great resource for blowers.

Area of ​​circle: radius squared 3.14 ( [r x r] x 3.14) Example area of ​​3″ round pipe: (1.5 x 1.5) x 3.14 = 7.065 sq.

· Convert square inches to square feet: divide square inches by 144.

For example:

1. Kennel room is 20 ft x 15 ft with 10 ft high ceiling: 20 x 20 x 10 = 4000 cubic feet

2. Five (5) air changes per hour = 4000 x 5 = 20,000 cubic feet

3. Determine cfm (cubic feet per minute) 20,000 / 60 = 333 cfm

4. Safe ventilation: 1.5 x 333 = 500 cfm

5. From Grainger’s: http://www.grainger.com/Grainger/items/2C946 This blower delivers 537 cfm at ½” static pressure, and is only $165.38 and can be assembled at most dealerships.

6. Basic pipe size in square inches: (500cfm / 2000 fpm) x 144 = 36 square inches. You can use a 6’x 6″ square duct, or a 7″ diameter round duct.

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