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cfm calculation

 
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Old 04-20-2011, 02:14 PM   #1
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cfm calculation


need to purchase and install evaporative coolers for 6000 sq ft hall and adjoining 2000 sq ft lounge; Presently, there are three 12000 cfm units and one 9000 cfm unit in the hall, and one 12000 cfm unit and three 5500 cfm units in the lounge. Are these adequate? They are very old units and need to replace.

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Old 04-20-2011, 02:23 PM   #2
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Re: cfm calculation


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need to purchase and install evaporative coolers for 6000 sq ft hall and adjoining 2000 sq ft lounge; Presently, there are three 12000 cfm units and one 9000 cfm unit in the hall, and one 12000 cfm unit and three 5500 cfm units in the lounge. Are these adequate? They are very old units and need to replace.
Four of he large units have a duct size of about 36"x28", smaller units are 22x18, Large units are side draft, smaller units have three that are down draft and the others are side draft.
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Old 04-20-2011, 02:28 PM   #3
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Re: cfm calculation


[quote=HVAC5841;4803] Four of he large units have a duct size of about 36"x28", smaller units are 22x18, Large units are side draft, smaller units have three that are down draft and the others are side draft.Four of the large units have a duct opening of 36#x28#, The smaller units have openings of about 22'x24" .
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Old 04-20-2011, 02:29 PM   #4
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Re: cfm calculation


Need installation asap
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Old 04-23-2011, 05:30 PM   #5
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Re: cfm calculation


I'll send my estimater over to review the drawings to give a competetive bid.
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Old 04-29-2011, 08:04 PM   #6
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Re: cfm calculation


Are you an HVAC contractor, or a general contractor.
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Old 04-29-2011, 10:30 PM   #7
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Re: cfm calculation


When you say evaporative cooler are you refering to an evaporative water cooler using well water for cooling?
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Old 09-13-2015, 07:17 AM   #8
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Re: cfm calculation


To calculate room air changes, measure the supply airflow into a room, multiply the CFM times 60 minutes per hour. Then divide by the volume of the room in cubic feet: In plain English, we're changing CFM into Cubic Feet per Hour (CFH).
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Old 11-22-2015, 08:52 AM   #9
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Re: cfm calculation


with 410 dont convert in any application unless it is a piston coil.
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Old 12-29-2017, 09:07 AM   #10
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Re: cfm calculation


Quote:
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To calculate room air changes, measure the supply airflow into a room, multiply the CFM times 60 minutes per hour. Then divide by the volume of the room in cubic feet: In plain English, we're changing CFM into Cubic Feet per Hour (CFH).
Yes this is what you do
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