Properly designed ventilation can reduce or eliminate odors, reduce the accumulation of bacteria and help maintain a fresh, clean smell in the nursery. Your pets will be happier and you will spend less time trying to dry the floors and eliminate odors. If you have problems understanding the information in this article, email us at Sun Pet Supplies.
Regardless of the size of your facility, ventilation will play a key role in the first impression of the nursery visitors. Simply put, controlled ventilation, directed air movement.
Design Basics:
- Air exchanges : change all the air in the room four to six times an hour. Calculate the volume of a room in cubic feet, multiply the result by four, five or six, then divide by sixty to find the volume of air, in cfm (cubic feet per minute).
- Exhaust gas capture points : Most kennel odors are created at the same level as dogs, so your exhaust emission points are below 30 inches to ensure that the odor is pushed down, away from your nose. However, not less than twelve inches from the floor to prevent clean water from entering the ventilation system.
- How many exhaust points : A multitude of points throughout the room provide air traffic that is able to circulate properly. Remember that we are not talking about the reverse air duct to your heating system, we are talking about exhaust ports to remove air from the room.
- Air supply : Install air vents, high in the room. This allows air to flow down to the exhaust points, thereby reducing odors and away from the nose. Remember that the supply air must be filtered and tempered (heated or cooled) and not be raw outside air. Your HVAC contractor may install an installation that provides sufficient fresh air to the ventilation system to meet supply requirements.
- Position of the air vents: Arrange the ventilation holes along the aisles and exhaust points at the back of the tracks in the walls or as pipes running down the walls. If the heat source is a “hot air” system, a third of the heated air is inserted on the floor, and two-thirds are inserted through the vent holes above the aisles.
- Type and design of the exhaust fan A: You want to use a centrifugal wheel blower as an air engine. Fans and blowers that use a blade similar to the blades of a window fan cannot exceed the static pressure created by the duct required for several gripping points.
- Blower size : Create a safety factor by multiplying the cfm value that you calculated in step 1 by 1.5 to provide enough air, and then select an exhaust fan to move that amount of cfm at “static pressure” or higher. is the resistance to air flow, usually created by the duct system.
- Duct Calibration : The high air velocity in the system will ensure good air flow, therefore the size of the air ducts will be about 2000 feet per minute of air velocity. The simplest approach to calibration is to determine the size of the channel required to process the entire air flow, and then set this size as the main channel through the building. Determine the number of desired drops and divide the area of the primary channel by the number of drops. Then each drop has a size for this area. Use this formula to determine the size of the primary channel: (cfm / 1500fpm) x 144 = channel area in square inches
Information about the formula: · http://www.Grainger.com - an excellent source for blowers.
· Area of a circle: square of a square 3.14 ([rxr] x 3.14) An example of an area of 3 "round channel: (1.5 x 1.5) x 3.14 = 7.065 in. 2
· Convert square inches to square feet: divide square inches by 144. From the example above, 7.065 square inches divided by 144 = 0.049 square feet.
Example:
1. Nursery room 20 feet x 15 feet with a ceiling height of 10 feet: 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. Safety factor airflow: 1 , 5 x 333 = 500 cubic feet per minute
5. From Grainger: http://www.grainger.com/Grainger/items/2C946 This fan moves 537 cubic feet per second at “static pressure” and is only $ 165.38 and can be connected to most outlets.
6. The size of the primary channel in square inches: (500cfm / 2000 fpm) x 144 = 36 square inches. You can use the 6-inch square channel or the round channel with a diameter of 7 inches.
