OVERVIEW Combination Supply/Return Diffuser (SARM)

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1 OVERVIEW Combination Supply/Return Diffuser (SARM) APPLICATION INFORMATION The extruded aluminum square and rectangular supply and return diffusers are designed principally for packaged roof top type heating and air conditioning units. They are recommended for heating, ventilating or cooling in ceiling installations that required a four-way horizontal pattern. FEATURES Supply and Return The Model SARM diffuser is a four-way pattern diffuser designed for heating or cooling. It is used when it is desirable to have one unit handle both the supply and return air. The return air duct is inside the supply air duct and attaches to a separate collar on the return air section of the diffuser. DIMENSIONAL DATA 2-3/4 2-1/4 B +1/16 D 1-1/2 B +3-3/4 Duct By Others 3/4 3/16 A +3-3/4 1-5/16 2-1/16 C A +1/16 Diffuser Dimensions Supply Return Supply Return Supply Return Supply Return Size Size Size Size Size Size Size Size A x B C x D A x B C x D A x B C x D A x B C x D 21x21 12x12 27x60 18x51 36x48 24x36 45x60 30x45 21x36 12x27 30x30 21x21 36x60 24x48 48x48 33x33 21x48 12x39 33x33 21x21 39x39 27x27 48x60 33x45 21x60 12x51 33x36 21x24 42x42 27x27 51x51 36x36 24x24 15x15 30x36 21x27 42x48 27x33 54x54 36x36 24x36 15x27 33x42 21x30 39x48 27x36 54x60 36x43 24x48 15x39 22x48 21x36 42x60 27x45 51x60 36x45 24x60 15x51 30x48 21x39 39x60 27x48 57x57 39x39 27x27 18x18 33x60 21x48 45x45 30x30 57x60 39x42 27x36 18x27 30x60 21x51 45x48 30x33 60x60 42x42 27x48 18x39 26x36 24x24 MINIMUM CEILING OPENING A +2 x B +2 Modeling Number System S A R M S - Diffuser A - Aluminum R - Supply & Return DESIGN SERIES SUPPLY SIZE SUPPLY SIZE RETURN SIZE RETURN SIZE FINISH 24- Etch and Lacquer (Std) 04- Gray 11- Bright White (For Other Finishes See Master Finish List) A-86

2 Throws are based on supply air temperature equal to room temperature. Chilled supply air will therefore result in throw values less than tabulated. The valve shown as the minimum distance from the wall is the minimum distance from a wall the diffuser can be mounted and sustain a velocity no greater than 50 FPM in the occupied zone (the room space) below the 6 foot level, excluding the space within 6 inches of the walls and floor). The maximum throw value is the distance from the diffuser at which the terminal velocity (the highest sustained velocity in the mixed air stream) is reduced to a maximum of 50 FPM. The value should be considered when air streams are to be directed toward each other or toward obstructions. Selection Procedure The Model SARM supply and return diffusers provide delivery of conditioned air and the return of exhaust air. Selection data for the square and rectangular diffusers are located in Tables 1 and 2. Performance characteristics are recorded as function of neck velocity. NC is the noise criteria which will not be exceeded by the diffuser in a room having a room attenuation equaling 10 decibels (db). Rating L indicates an NC level less than 20 db. Sound data is based on watt. CFM Total CFM Each Side x21 Supply Minimum Distance from Wall Maximum Throw NC CFM x12 Return PT NC CFM Total CFM Each Side x24 Supply Minimum Distance from Wall Maximum Throw NC CFM x15 Return PT NC CFM Total CFM Each Side x27 Supply PT , Minimum Distance from Wall Maximum Throw CFM x18 Return PT CFM Total CFM Each Side x30 Supply Minimum Distance from Wall Maximum Throw CFM x21 Return PT CFM Total CFM Each Side x33 Supply Minimum Distance from Wall Maximum Throw CFM x21 Return PT A-87

3 CFM Total CFM Each Side x36 Supply Minimum Distance from Wall Maximum Throw NC CFM x24 Return PT NC CFM Total CFM Each Side x39 Supply Minimum Distance from Wall Maximum Throw NC CFM x27 Return PT NC CFM Total CFM Each Side x42 Supply Minimum Distance from Wall Maximum Throw CFM x27 Return PT CFM Total CFM Each Side x45 Supply Minimum Distance from Wall Maximum Throw CFM x30 Return PT CFM Total CFM Each Side x48 Supply Minimum Distance from Wall Maximum Throw NC CFM x33 Return PT NC CFM Total CFM Each Side x51 Supply Minimum Distance from Wall Maximum Throw CFM x36 Return PT CFM Total CFM Each Side x54 Supply PT, Minimum Distance from Wall Maximum Throw NC CFM x36 Return PT NC CFM Total CFM Each Side x57 Supply Minimum Distance from Wall Maximum Throw CFM x39 Return PT CFM Total CFM Each Side x60 Supply Minimum Distance from Wall Maximum Throw CFM x42 Return PT A-88

4 Y Z CFM Total CFM Side Y CFM Size Z x36 Supply Minimum Distance from Wall - Y Maximum Throw - Y CFM x27 Return PT CFM Total CFM Side Y CFM Size Z x48 Supply Minimum Distance from Wall - Y CFM x39 Return PT CFM Total CFM Side Y CFM Size Z x60 Supply Minimum Distance from Wall - Y CFM x51 Return PT CFM Total CFM Side Y CFM Size Z x36 Supply Minimum Distance from Wall - Y Maximum Throw - Y Minimum Distance from Wall - Z CFM x27 Return PT CFM Total CFM Side Y CFM Size Z x48 Supply Minimum Distance from Wall - Y NC CFM x39 Return PT NC CFM Total CFM Side Y CFM Size Z x60 Supply Minimum Distance from Wall - Y CFM x51 Return PT CFM Total CFM Side Y CFM Size Z x36 Supply Minimum Distance from Wall - Y Maximum Throw - Y Minimum Distance from Wall - Z Maximum Throw - Z CFM x27 Return PT A-89

5 CFM Total CFM Side Y CFM Size Z x48 Supply Minimum Distance from Wall - Y Minimum Distance from Wall - Z Maximum Throw - Z NC CFM x39 Return PT NC CFM Total CFM Side Y CFM Size Z x60 Supply Minimum Distance from Wall - Y Minimum Distance from Wall - Z Maximum Throw - Z CFM x51 Return PT CFM Total CFM Side Y CFM Size Z x36 Supply Minimum Distance from Wall - Y Maximum Throw - Y Minimum Distance from Wall - Z Maximum Throw - Z CFM x27 Return PT CFM Total CFM Side Y CFM Size Z x48 Supply Minimum Distance from Wall - Y Minimum Distance from Wall - Z Maximum Throw - Z NC CFM x39 Return PT NC CFM Total CFM Side Y CFM Size Z x60 Supply Minimum Distance from Wall - Y Minimum Distance from Wall - Z Maximum Throw - Z NC CFM x51 Return PT NC CFM Total CFM Side Y x36 Supply Minimum Distance from Wall - Y Maximum Throw - Y CFM x24 Return PT CFM Total CFM Side Y x42 Supply Minimum Distance from Wall - Y Maximum Throw - Y NC CFM x30 Return PT NC A-90

6 CFM Total CFM Side Y x48 Supply Minimum Distance from Wall - Y Maximum Throw - Y CFM x36 Return PT CFM Total CFM Side Y x60 Supply Minimum Distance from Wall - Y Maximum Throw - Y NC CFM x48 Return PT NC CFM Total CFM Side Y CFM Size Z x48 Supply Minimum Distance from Wall - Y Maximum Throw - Y Minimum Distance from Wall - Z Maximum Throw - Z CFM x36 Return PT CFM Total CFM Side Y CFM Size Z x60 Supply Minimum Distance from Wall - Y Maximum Throw - Y Minimum Distance from Wall - Z Maximum Throw - Z NC CFM x48 Return PT NC CFM Total CFM Side Y CFM Size Z x48 Supply Minimum Distance from Wall - Y Maximum Throw - Y Minimum Distance from Wall - Z Maximum Throw - Z NC CFM x36 Return PT NC CFM Total CFM Side Y CFM Size Z x60 Supply Minimum Distance from Wall - Y Maximum Throw - Y Minimum Distance from Wall - Z Maximum Throw - Z CFM x48 Return PT CFM Total CFM Side Y CFM Size Z x48 Supply Minimum Distance from Wall - Y Maximum Throw - Y Minimum Distance from Wall - Z Maximum Throw - Z CFM x33 Return PT A-91

7 CFM Total CFM Size Z x60 Supply Minimum Distance from Wall - Y Minimum Distance from Wall - Z Maximum Throw - Z CFM x45 Return PT CFM Total CFM Side Y CFM Size Z x48 Supply Minimum Distance from Wall - Y Maximum Throw - Y Minimum Distance from Wall - Z Maximum Throw - Z CFM x33 Return PT CFM Total CFM Size Z x60 Supply Minimum Distance from Wall - Y Minimum Distance from Wall - Z Maximum Throw - Z CFM x45 Return PT CFM Total CFM Size Z x60 Supply Minimum Distance from Wall - Y Minimum Distance from Wall - Z Maximum Throw - Z CFM x45 Return PT CFM Total CFM Size Z x60 Supply Minimum Distance from Wall - Y Minimum Distance from Wall - Z Maximum Throw - Z NC CFM x45 Return PT NC CFM Total CFM Side Y CFM Size Z x60 Supply Minimum Distance from Wall - Y Maximum Throw - Y Minimum Distance from Wall - Z Maximum Throw - Z CFM x42 Return PT CFM Total CFM Side Y CFM Size Z x60 Supply Minimum Distance from Wall - Y Maximum Throw - Y Minimum Distance from Wall - Z Maximum Throw - Z CFM x42 Return PT A-92

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