Answer / thirukumar

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

Answer / sastha

1tr =400cfm

Answer / moinuddin

1 tr = 400Cfm as a rough estimate

Answer / co

1 TR= 400 CFM

EX. 10000CFM/400= 25 TR

Answer / shashi

inorder to calculate tr you can use following formula:

Delta T in F X Flow in USGPM / 24

Answer / nagabhooshana p

1 tr = 400Cfm as a rough estimate

Answer / mahendra patil

1tr =? btu

Answer / sreenivasa rao avupati

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,

Answer / ramakrishna m.r.

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

Answer / mahesh

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.

Any answer or formula recording above concept ,please share

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