How to calculate the CFM to TR?
What is the Formula

Answers were Sorted based on User's Feedback

How to calculate the CFM to TR? What is the Formula..

each TR = 400 CFM
thumb rule
200 Sq.ft = 1 TR ..... 150 to 200 Sq.ft = 1TR

 Is This Answer Correct ? 281 Yes 65 No

How to calculate the CFM to TR? What is the Formula..

1tr =400cfm

 Is This Answer Correct ? 236 Yes 21 No

How to calculate the CFM to TR? What is the Formula..

1 tr = 400Cfm as a rough estimate

 Is This Answer Correct ? 134 Yes 18 No

How to calculate the CFM to TR? What is the Formula..

1 TR= 400 CFM

EX. 10000CFM/400= 25 TR

 Is This Answer Correct ? 87 Yes 12 No

How to calculate the CFM to TR? What is the Formula..

inorder to calculate tr you can use following formula:

Delta T in F X Flow in USGPM / 24

 Is This Answer Correct ? 70 Yes 28 No

How to calculate the CFM to TR? What is the Formula..

1 tr = 400Cfm as a rough estimate

 Is This Answer Correct ? 45 Yes 7 No

How to calculate the CFM to TR? What is the Formula..

1tr =? btu

 Is This Answer Correct ? 36 Yes 18 No

How to calculate the CFM to TR? What is the Formula..

We have to do Heat load calculation where we can achieve at
Grand total heat ( Sum of Grand Sen Heat + Grand Lat Heat).

TR = (GTH*1.05)/12000 TR - GTH in Btu/Hr

Calculation of TR from CFM is a thumb rule and dependa upon
inside design conditions. For Comform applications ( DBT-
Inside 2DegC & 55% RH we amy consider 400 Cfm per 1 TR).

In case of low temperature ( DBT:23+/-2 Deg C and RH <50%
this can be 250 to 300 Cfm per 1 TR.

But my recommendation is to do rough Heat load calculation
which can give the appropriate TR requirement.

Regards,

 Is This Answer Correct ? 23 Yes 5 No

How to calculate the CFM to TR? What is the Formula..

each TR = 350 to 400 cfm as per manufacture

thumb rule

150 to 170 Sq.ft = 1 TR should not cross more than 180 sq.ft

 Is This Answer Correct ? 35 Yes 21 No

How to calculate the CFM to TR? What is the Formula..

Actually we are following the 1 TR =400 CFM consider it should be re-circulation system, because of we consider less T.R compare to Once-through system ,so 200 to 300 CFM for 1 T.R suitable for Once-through system.

otherwise 400 CFM consider for Once-through system AHU Capacity will be increased.so better to consider 200 to 300 CFM for Once-through AHU's.

 Is This Answer Correct ? 4 Yes 1 No

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