EXTRUDED ALUMINUM SQUARE AND RECTANGULAR DIFFUSERS

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Bethany Cook
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1 INDUSTRIAL REGISTRATION NO.353 EXTRUDED ALUMINUM SQUARE AND RECTANGULAR DIFFUSERS

SQUARE AND RECTANGULAR FLUSH CEILING DIFFUSERS OUTSTANDING FEATURES: Extruded

Inner section easily removable and locks in place without the use of tools.

Other colors (Optional) MODEL 4 SNOD Four way - square diffuser - square neck - with

MODEL 4 RNOD Four way-rectangular diffuser - rectangular neck - with MODEL 2 CSNOD

square diffuser - with opposed blade damper with round neck.

rectangular diffuser - rectangular neck with MODEL 3 SNOD Three way - square

rectangular neck with MODEL 1 SNOD One way - square diffuser - square neck with

2 SQUARE AND RECTANGULAR FLUSH CEILING DIFFUSERS OUTSTANDING FEATURES: Extruded aluminum construction way throw patterns. Inner section easily removable and locks in place without the use of tools. Available in square, rectangular or round necks. Standard finish - Anodized. Other colors (Optional) MODEL 4 SNOD Four way - square diffuser - square neck - with opposed blade damper. MODEL 4 RNOD Four way-rectangular diffuser - rectangular neck - with opposed blade damper. MODEL 2 CSNOD Two way corner throw - square diffuser - square neck - with opposed blade damper. MODEL 4 CNOD Four way - square diffuser - with opposed blade damper with round neck. MODEL 2 SNOD Two way - square diffuser - square neck - with opposed blade damper. MODEL 2 RNOD Two way - rectangular diffuser - rectangular neck with opposed blade damper. MODEL 3 SNOD Three way - square diffuser - square neck - with opposed blade damper. MODEL 3 RNOD Three way - rectangular diffuser - rectangular neck with opposed blade damper. MODEL 1 SNOD One way - square diffuser - square neck with opposed blade damper. MODEL 1 RNOD One way - rectangular diffuser - rectangular neck with opposed blade damper. 2

3 3

4 SELECTION PROCEDURE The area to be served by a diffuser should be divided into equal squares and when possible these areas should not exceed twice the mounting height. It is not necessary to locate outlet in the center of discharge area, since 3 - way and 2 - way patterns can be used to compensate for other locations. 2 - way opposite patterns may be used for rectangular areas such as corridors. Before selecting the diffuser pattern and size for a conditioned space it will be necessary for the designer to obtain the following: 1 - CFM for each diffuser. 2 - Location of diffusers. 3 - Horizontal throw dimension and ceiling height. 4 - Type of occupancy. 5 - Type of ceiling, whether plaster, tile, T-bar, metal plan or acoustic plaster. The following is the suggested method for the selection of diffusers. 1. Determine the maximum CFM for entire area. The CFM to heat or cool on area is calculated in accordance with method outlined in section on Heating and Cooling Loads in ASHRAE Guide. 2. Tentatively select the diffuser design i.e., one way, two way, three way or four way blow. 3. From Table 1 (CFM-TD RATIOS) find the maximum allowable CFM per each side of the diffuser in accordance with ceiling height. 4. From the above information determine the total maximum CFM per diffuser. Divide this into the total CFM for entire area to indicate the approximate number of diffusers required. 5. Determine from type of occupancy the sound level desired from Table Wrth C.F.M. per diffuser and sound level established, select from performance table the diffusers that will satisfy these conditions and provide the throw required. It should be realized that NC. 30 is "very quite". If the background level is too low, discontinuous noises may not be "masked" and thus cause distraction. Recognizing this, many designers use the high end of the recommended range to establish the allowable criteria for air distribution outlets. 4

5 MODEL 4 SNOD FOUR-WAY THROW SQUARE DIFFUSERS NECK SIZE Ak NECK VELOCITY FPM Total Pressure " X 6" Ak =.13 Total CFM CFM each side-a Throw each side-a " X 9" Total CFM CFM each side-a Ak =.28 Throw each side-a " X 12" Total CFM CFM each side-a Ak =.5 Throw each side-a " X 15" Total CFM CFM each side-a Ak =.79 Throw each side-a " X 18" Total CFM CFM each side-a Ak = 1.13 Throw each side-a " X 21" Total CFM CFM each side-a Ak = 1.54 Throw each side-a " X 24" Total CFM CFM each side-a Ak = 2 Throw each side-a Diffuser selections which will result in noise criterias not exceeding. approximately 20 DB based on a room Attenuation of 8 DB. Resulting criteria not exceeding 30 DB. Resulting criteria not exceeding approximately 40 DB. Resulting criteria exceeding 40 DB. 5

6 MODEL 4 RNOD FOUR-WAY THROW RECTANGULAR DIFFUSERS Ak FPM Total Pressure Total CFM " X 9" CFM each side-a CFM each sidc-b Ak =.19 Throw each side-a Throw each side-b Total CFM " X 12" CFM each side-a CFM each sidc-b Ak =.25 Throw each side-a Throw each side-b Total CFM " X 15" CFM each side-a CFM each side-b Ak =.32 Throw each side-a Throw each side-b Total CFM " X 18" CFM each side-a CFM each side-b Ak =.38 Throw each side-a Throw each sidc-b Total CFM " X 21" CFM each side-a CFM each sidc-b Ak =.44 Throw each side-a Throw each side-b Total CFM " X 24" CFM each side-a CFM each side-b Ak.5 Throw each side-a Throw each side-b Total CFM " X 12" CFM each side-a CFM each sidc-b Ak =.38 Throw each side-a Throw each side-b Total CFM " X 15" CFM each side-a CFM each side-b Ak =.47 Throw each side-a Throw each side-b Total CFM " X 18" CFM each side-a CFM each sidc-b Ak =.57 Throw each side-a Throw each side-b

7 (MODEL 4 RNOD CONT.) Ak FPM Total Pressure Total CFM " X 21" CFM each side-a CFM each side-b Ak =.66 Throw each side-a Throw each side-b Total CFM " X 24" CFM each side-a CFM each side-b Ak =.76 Throw each side-a Throw each side-b Total CFM " X 15" CFM each side-a CFM each side-b Ak =.63 Throw each side-a Throw each side-b Total CFM " X 18" CFM each side-a CFM each side-b Ak =.76 Throw each side-a Throw each side-b Total CFM " X 21" CFM each side-a CFM each side-b Ak =.88 Throw each side-a Throw each side-b Total CFM " X 24" CFM each side-a CFM each side-b Ak = 1.0 Throw each side-a Throw each side-b Total CFM " X 18" CFM each side-a CFM each side-b Ak =.95 Throw each side-a Throw each side-b Total CFM " X 21" CFM each side-a CFM each side-b Ak = 1.1 Throw each side-a Throw each side-b Total CFM " X 24" CFM each side-a CFM each side-b Ak = 1.26 Throw each side-a Throw each side-b "Total CFM " X 21" CFM each side-a CFM each side-b Ak = 1.32 Throw each side-a Throw each side-b Total CFM " X 24" CFM each side-a CFM each side-b Ak = 1.5 Throw each side-a Throw each side-b

8 MODEL 3 SNOD THREE-WAY THROW SQUARE DIFFUSERS Ak FPM Total Pressure Total CFM " X 6" CFM each side-a CFM each side-b Ak =.13 Throw each side-a Throw each side-b Total CFM " X 9" CFM each side-a CFM each side-b Ak =.28 Throw each side-a Throw each side-b Total CFM " X 12" CFM each side-a CFM each side-b Ak =.5 Throw each side-a Throw each side-b Total CFM " X 15" CFM each side-a CFM each side-b Ak =.79 Throw each side-a Throw each side-b Total CFM " X 18" CFM each side-a CFM each side-b Ak = 1.13 Throw each side-a Throw each side-b Total CFM " X 21" CFM each side-a CFM each side-b Ak = 1.54 Throw each side-a Throw each side-b Total CFM " X 24" CFM each side-a CFM each side-b Ak = 2 Throw each side-a Throw each side-b Diffuser selections which will result in noise criterias not exceeding. approximately 20 DB based on a room Attenuation of 8 DB. Resulting criteria not exceeding 30 DB. Resulting criteria not exceeding approximately 40 DB. Resulting criteria exceeding 40 DB. 8

9 MODEL 3 RNOD THREE-WAY THROW. RECTANGULAR DIFFUSERS Ak FPM Total Pressure Total CFM " X 9" CFM each side-a CFM each side-b Ak =.19 Throw each side-a Throw each side-b Total CFM " X 12" CFM each side-a CFM each side-b Ak =.25. Throw each side-a Throw each side-b Total CFM " X 15" CFM each side-a CFM each side-b Ak =.32 Throw each side-a Throw each side-b Total CFM " X 18" CFM each side-a CFM each side-b Ak =.38 Throw each side-a Throw each side-b Total CFM " X 21" CFM each side-a CFM each side-b Ak =.44 Throw each side-a Throw each side-b Total CFM " X 24" CFM each side-a CFM each side-b Ak =.5 Throw each side-a Throw each side-b Total CFM " X 12" CFM each side-a CFM each side-b Ak =.38 Throw each side-a Throw each side-b Total CFM " X 15" CFM each side-a CFM each side-b Ak =.47 Throw each side-a Throw each side-b Total CFM " X 18" CFM each side-a CFM each side-b Ak =.57 Throw each side-a Throw each side-b

10 (MODEL 3 RNOD CONT.) Ak FPM Total Pressure total CFM " X 21" CFM each side-a CFM each side-b Ak =.66 Throw each side-a Throw each side-b Total CFM " X 24" CFM each side-a CFM each side-b Ak =.76 Throw each side-a Throw each side-b Total CFM " X 15" CFM each side-a CFM each side-b Ak =.63 Throw each side-a Throw each side-b Total CFM " X 18" CFM each side-a CFM each side-b Ak =.76 Throw each side-a Throw each side-b Total CFM " X 21" CFM each side-a CFM each side-b Ak =.88 Throw each side-a Throw each side-b Total CFM " X 24" CFM each side-a CFM each side-b Ak = 1.0 Throw each side-a Throw each side-b Total CFM " X 18" CFM each side-a CFM each side-b Ak =.95 Throw each side-a Throw each side-b Total CFM " X 21" CFM each side-a CFM each side-b Ak = 1.1 Throw each side-a Throw each side-b Total CFM " X 24" CFM each side-a CFM each side-b Ak = 1.26 Throw each side-a Throw each side-b Total CFM " X 21" CFM each side-a CFM each side-b Ak = 1.32 Throw each side-a Throw each side-b Total CFM " X 24" CFM each side-a CFM each side-b Ak = 1.5 Throw each side-a Throw each side-b

11 MODEL 2 SNOD TWO-WAY THROW SQUARE DIFFUSERS Ak FPM Total Pressure " X 6" Total CFM CFM each side-a Ak =.13 Throw each side-a " X 9" Total CFM CFM each side-a Ak =.28 Throw each side-a " X 12" Total CFM CFM each side-a Ak =.5 Throw each side-a " X 15" Total CFM CFM each side-a Ak =.79 Throw each side-a " X 18" Total CFM CFM each side-a Ak = 1.13 Throw each side-a " X 21" Total CFM CFM each side-a Ak = 1.54 Throw each side-a " X 24" Total CFM CFM each side-a Ak = 2 Throw each side-a Diffuser selections which will result in noise criterias not exceeding. approximately 20 DB based on a room Attenuation of 8 DB. Resulting criteria not exceeding 30 DB. Resulting criteria not exceeding approximately 40 DB. Resulting criteria exceeding 40 DB. 11

12 MODEL 2 RNOD TWO-WAY THROW RECTANGULAR DIFFUSERS Ak FPM Total Pressure " X 9" Total CFM CFM each side-a Ak = 19 Throw each side-a " X 12" Total CFM CFM each side-a Ak =.25 Throw each side-a " X 15" Total CFM CFM each side-a Ak =.32 Throw each side-a " X 18" Total CFM CFM each side-a Ak =.38 Throw each side-a " X 21" Total CFM CFM each side-a Ak =.44 Throw each side-a " X 24" Total CFM CFM each side-a Ak =.5 Throw each side-a " X 12" Total CFM CFM each side-a Ak =.38 Throw each side-a " X 15" Total CFM CFM each side-a Ak =.47 Throw each side-a " X 18" Total CFM CFM each side-a Ak =.57 Throw each side-a

13 (MODEL 2 RNOD CONT.) Ak FPM Total Pressure " X 21" Total CFM CFM each side-a Ak =.66 Throw each side-a " X 24" Total CFM CFM each side-a Ak =.76 Throw each side-a " X 15" Total CFM CFM each side-a Ak =.63 Throw each side-a " X 18" Total CFM CFM each side-a Ak =.76 Throw each side-a " X 21" Total CFM CFM each side-a Ak =.88 Throw each side-a " X 24" Total CFM CFM each side-a Ak = 1.0 Throw each side-a " X 18" Total CFM CFM each side-a Ak =.95 Throw each side-a " X 21" Total CFM CFM each side-a Ak = 1.1 Throw each side-a " X 24" Total CFM CFM each side-a Ak = 1.26 Throw each side-a " X 21" Total CFM CFM each side-a Ak = 1.32 Throw each side-a " X 24" Total CFM CFM each side-a Ak = 1.5 Throw each side-a

14 MODEL 2 CSNOD TWO-WAY CORNER THROW SQUARE DIFFUSERS Ak FPM Total Pressure " X 6" Total CFM CFM each side-a Ak =.13 Throw each side-a " X 9" Total CFM CFM each side-a Ak =.28 Throw each side-a " X 12" Total CFM CFM each side-a Ak =.5 Throw each side-a " X 15" Total CFM CFM each side-a Ak =.79 Throw each side-a " x 18" Total CFM CFM each side-a Ak = 1.13 Throw each side-a " X 21" Total CFM CFM each side-a Ak = 1.54 Throw each side-a " X 24" Total CFM CFM each side-a Ak = 2.0 Throw each side-a Diffuser selections which will result in noise criterias not exceeding. approximately 20 DB based on a room Attenuation of 8 DB. Resulting criteria not exceeding 30 DB. Resulting criteria not exceeding approximately 40 DB. Resulting criteria exceeding 40 DB. 14

15 MODEL 1 SNOD ONE-WAY THROW SQUARE DIFFUSERS Ak FPM Total Pressure " X 6" Total CFM Ak =.13 Throw " X 9" Total CFM Ak =.28 Throw " X 12" Total CFM Ak =.5 Throw " x 15" Total CFM Ak =.79 Throw " x 18" Total CFM Ak = 1.13 Throw " X 21" Total CFM Ak = 1.54 Throw " X 24" Total CFM Ak = 2 Throw Diffuser selections which will result in noise criterias not exceeding. approximately 20 DB based on a room Attenuation of 8 DB. Resulting criteria not exceeding 30 DB. Resulting criteria not exceeding approximately 40 DB. Resulting criteria exceeding 40 DB. 15

16 MODEL 1 RNOD ONE-WAY THROW RECTANGULAR DIFFUSERS Ak FPM Total Pressure " X 9" Total CFM Ak =.19 Throw " X 12" Total CFM Ak =.25 Throw " X 15" Total CFM Ak =.32 Throw " X 18" Total CFM Ak =.38 Throw " X 21" Total CFM Ak =.44 Throw " X 24" Total CFM Ak =.5 Throw " X 12" Total CFM Ak =.38 Throw " X 15" Total CFM Ak =.47 Throw " X 18" Total CFM Ak =.57 Throw " X 21" Total CFM Ak =.66 Throw

17 MODEL 1 RNOD (CONT.) NECK SIZE NECK VELOCITY Ak FPM Total Pressure " X 24" Total CFM Ak =.76 Throw " X 15" Total CFM Ak =.63 Throw " X 18" Total CFM Ak =.76 Throw " X 21" Total CFM Ak =.88 Throw " X 24" Total CFM Ak = 1.0 Throw " X 18" Total CFM Ak =.95 Throw " X 21" Total CFM Ak = 1.1 Throw " X 24" Total CFM Ak = 1.26 Throw " X 21" Total CFM Ak = 1.32 Throw " X 24" Total CFM Ak = 1.5 Throw Diffuser selections which will result in noise criterias not exceeding. approximately 20 DB based on a room Attenuation of 8 DB. Resulting criteria not exceeding 30 DB. Resulting criteria not exceeding approximately 40 DB. Resulting criteria exceeding 40 DB. 17

18 MODEL 4 CNOD ROUND NECK SIZES SQUARE DIFFUSERS Neck Size Fits on Neck Velocity (Inches) Square FPM Neck Total Press WG Dia. Total CFM X 9 CFM each side Ak =.159 Throw each side Total Press WG Dia. Total CFM S X 9 CFM each side Ak =.211 Throw each side Total Press WG Dia. Total CFM X 9 CFM each side IS Ak =.238 Throw each side Total Press WG Dia. Total CFM X 12 CFM each side 2S Ak =.45 Throw each side Total Press WG Dia. Total CFM X 15 CFM each side Ak =.683 Throw each side Total Press WG Dia. Total CFM 214 : X 15 CFM each side 54 SO Ak =.696 Throw each side Total Press WG Dia. Total CFM x 18 CFM each side Ak =.977 Throw each side Total Press WG Dia. Total CFM X 21 CFM each side Ak =.347 Throw each side

19 (CONT. - MODEL 4 CNOD ROUND NECK SIZES) Neck Size Fits on Neck Velocity (Inches) Square FPM Neck Total Press WG Dia. Total CFM X 21 CFM each side Ak =.496 Throw each side Total Press WG Dia. Total CFM X 21 CFM each side Ak =.699 Throw each side Total Press WG Dia. Total CFM X 21 CFM each side 54 SO Ak =.952 Throw each side Total Press WG Dia. Total CFM X 21 CFM each side Ak = 1.13 Throw each side Total Press WG Dia. Total CFM x 21 CFM cach side Ak = 1.29 Throw each side Total Press WG Dia. Total CFM X 21 CFM each side Ak Throw each side NOTE: Available also tor a 16", 18", 20", and 22" neck size diameters to fit on square neck size 24" X 24". Diffuser selections which will result in noise criterias not exceeding. approximately 20 DB based on a room Attenuation of 8 DB. Resulting criteria not exceeding 30 DB. Resulting criteria not exceeding approximately 40 DB. Resulting criteria exceeding 40 DB. 19

21 BALANCING PROCEDURE SQUARE AND RECTANGULAR FIG. I FIG. 2 FIG. 3 FIG. 4 FIG. 5 FIG. 6 To determine CFM, use an Alnor Velometer with 2220-A tip or Anemotherm positioned as shown in figure 6. Take readings at points shown by dots on the figures on all active discharge sides. Average the total readings to arrive at net velocity. To determine the CFM, multiply the average velocity to the Ak. Type of Area AUDITORIUMS Concert and Opera Halls, Studios for sound Reproduction.20 to 25 Legitimate Theaters. Multi-purpose Halls.25 to 30 Movie Theaters, Lecture halls, Planetarium, TV audience studios 30 to 35 Lobbies..35 to 45 CHURCHES AND SCHOOLS Sanctuaries 20 to 30 Libraries, Schools and Classrooms...30 to 40 Laboratories..35 to 45 Recreation Halls, Corridors and Halls...35 to 50 Kitchens.40 to 50 HOSPITALS AND CLINICS Private Rooms..25 to 35 Operating Rooms, Wards...30 to 40 Halls and Corridors, Laboratories. Lobbies and Waiting Rooms.35 to 45 Washrooms and Toilets..40 to 50 RESTAURANTS & LOUNGES Restaurants...35 to 45 Cocktail Lounges..35 to 50 Night Clubs...35 to 45 Cafeterias..40 to 50 STORES RETAIL Clothing Stores. Department Stores (upper floors)..35 to 45 Department Stores (main floor). Small Retail Stores, Supermarkets 40 to 50 RECOMMENDED NOISE CRITERIA FOR ROOMS NC Level, Decibels Type of Area NC Level. Decibels SPORT ACTIVITIES INDOOR Coliseums.30 to 40 Bowling Alleys, Gymnasiums.35 to 45 Swimming Pools...40 to 55 TRANSPORTATION Ticket Sales Offices.30 to 40 Lounges, Waiting Rooms 35 to 50 HOTELS Individual rooms or suites, Ball rooms, Banquet rooms..30 to 40 Halls and corridors Lobbies 35 to 45 Garages, Kitchens and Loundries.40 to 50 MANUFACTURING AREAS Foreman's Office..40 to 50 Assembly Lines, light Machinery 45 to 70 Foundries, Heavy Machinery..55 to 75 OFFICES Board Room..20 to 30 Conference Rooms..25 to 35 Executive Office 30 to 40 Supervisor Office, Reception Room..30 to 45 General Open Offices, Drafting Rooms 35 to 50 Halls and Corridors..35 to 55 Tabulation and Computation..40 to 60 PUBLIC BUILDINGS Public Libraries. Museums, Court Rooms 30 to 40 Post Offices. General Banking Areas, Lobbies...35 to 45 Washrooms and Toilets..40 to 50 Recommended range of Noise Criteria from ASHRAE GUIDE AND DATA BOOK Chapter 14 21

HCD HIGH CAPACITY DRUM LOUVER

HCD HIGH CAPACITY DRUM LOUVER HIGH CAPACITY DRUM LOUVER The s (HCD) consist of extruded aluminum blades mounted inside a rotatable drum to produce long air throws with a high degree of directional control. Rotateable drum provides