(48) Calculate Exhaust Fan Size (1.8.23).xlsx

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2	:Calculate Size of Ventilation Fan: (As per CPWD)			Jignesh.Parmar www.electricalnotes.wordpress.com
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4	Type of Room:	Toilets - Domestic
5	Length of Room:	4	Feet
6	Width of Room:	8	Feet
7	Height of Room:	3	Feet
8	Size of Room	96	Cubic Feet
9	Fresh Air Exchanges Rate in Room:	8	Times per Hour
10	Required Size of Ventilation Fan:	768	Cubic Foot / Hour (CFH)
11		13	Cubic Foot / Minute (CFM)
12		22	Cubic Meter / Hour (CMH)
13	Size of Ventilation Fan:	200 / 8"	mm / inch
14	Sound Level:	44 To 50	DB
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18	Recommended Air Change Rates For Room (ACH) (As per CPWD)
19	Type of Room	Air Change Rate / Hour	Consider
20	Shower Area	15 To 20	20
21	Bathroom & Shower Rooms	15 To 20	15
22	Bathroom	6 To 10	8
23	Bedrooms	2 To 4	4
24	Halls & Landings	4 To 6	5
25	Kitchens	10 To 20	15
26	Living & Other Domestic Rooms	4 To 6	5
27	Toilets - Domestic	6 To 10	8
28	Utility Rooms	15 To 20	15
29	Cafés	10 To 15	15
30	Canteens	8 To 12	10
31	Cellars	3 To 10	6
32	Changing Rooms with Showers	15 To 20	15
33	Conference Rooms	8 To 12	8
34	Garages	6 To 10	8
35	Hairdressing Salons	10 To 15	13
36	Hospital Wards	6 To 8	7
37	Laundries & Launderettes	10 To 15	13
38	Meeting Rooms	6 To 12	7
39	Offices	4 To 6	6
40	Restaurants & Bars	10 To 15	12
41	School Rooms	5 To 7	6
42	Shops	8 To 10	9
43	Sports Facilities	4 To 6	6
44	Store Rooms	3 To 6	5
45	Workshops	6 To 10	8
46	Assembly rooms	4 To 8	8
47	Bakeries	20 To 30	25
48	Banks/Building Societies	4 To 8	5
49	Billiard Rooms *	6 To 8	5
50	Boiler Rooms	15 To 30	25
51	Canteens	8 To 12	10
52	Changing Rooms Main area	6 To 10	8
53	Changing Rooms Shower area	15 To 20	17
54	Churches	1 To 3	3
55	Cinemas and theatres *	10 To 15	12
56	Club rooms	0 To 12	12
57	Compressor rooms	10 To 15	15
58	Conference rooms	8 To 12	12
59	Dairies	8 To 10	10
60	Dance halls	0.12	0.12
61	Dental surgeries	12 To 15	15
62	Dye works	20 - 30	30
63	Electroplating shops	10 To 12	12
64	Engine rooms	15 To 30	30
65	Entrance halls & corridors	3 To 5	5
66	Factories and workshops	8 To 10	10
67	Foundries	15 To 30	20
68	Glasshouses	25 To 60	50
69	Gymnasiums	0 To 6	6
70	Hospitals - Sterilising	15 To 25	20
71	Kitchens - Domestic	15 To 20	15
72	Kitchens - Commercial	0 To 3	3
73	Laboratories	6 To 15	12
74	Lavatories	6 To 15	12
75	Lecture theatres	5 To 8	8
76	Libraries	3 To 5	4
77	Mushroom houses	6 To 10	8
78	Paint shops (not cellulose)	10 To 20	15
79	Photo & X-ray darkrooms	10 To 15	12
80	Public house bars	0 To 12	12
81	Recording control rooms	15 To 25	20
82	Recording studios	10 To 12	10
83	Shops and supermarkets	8 To 15	12
84	Squash courts	0.04	0.04
85	Swimming baths	10 To 15	12
86	Welding shops	15 To 30	20
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91	Standard Exhaust Fan Size
92	M3/HR (CFH)	M3/MI (CFM)	Sound level dB	Fan DIA (MM / inches)	Speed (RPM)	Input Power (W)	Phase	Current (A)
93	270	5	44 To 50	150 / 6"	1200	24	Single	0.1
94	500	8	44 To 50	200 / 8"	1350	28	Single	0.12
95	800	13	44 To 50	250 / 10"	1350	36	Single	0.15
96	1710	29	50 To 55	305 / 12"	1400	50	Single	0.4
97	1145	19	35 To 40	305 / 12"	900	50	Single	0.21
98	3250	54	60 To 65	380 / 15"	1400	160	Single	0.75
99	3250	54	60 To 65	380 / 15"	1400	150	Three	0.45
100	2000	33	50 To 55	380 / 15"	900	90	Single	0.4