7/25/2019 Clinic Air Balancing Report-021113

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November, 02, 2013

Report on the Clinic Remodelling and Extension Project Air alancing!

Find attached the air balancing sheet for the AHU-C2 as measured against the designed data.

The total supply airflow measured in CFM is less compare to the total design airflow while

the return airflow is not returning bac to the AHU as needed.

1! AC"#$#"#E%

a. The supply airflows were measured and recorded. !ro"imity in reading is

noticed from the areas nearer to the AHU but the farther we go# the more the

difference.

b. The return airflows were insignificant in the cause of the measurement# we

then obser$ed that the %AF &return air fan' is not woring to assist the return

by the AHU.

c. (e obser$ed the %AF and noticed that the )F* controlling the %AF &return

air fan' is powered but not controlling the %AF.

d. (e disconnect the )F* from the %AF# and ad+usted the belt on the %AF

motor then powered the %AF directly from the gear switch. For the %AF to

run without modulating.

e. (e obser$ed a noticeable return airflow between ,CFM-CFM in areas

closer to the AHU but as one goes farther the return airflow become

negligible.

2! &%ER$A"#&N%

a. The )F* is not modulating the %AF.

b. After the %AF is directly powered there is more return air to the AHU# and in turn

there is e"change/mo$ement of air in the building space# more supply airflow and a

noticeable cooling.

c. The total supply airflow is less compared to design airflow.

3! AC"#&N #"E'%

a. There is need to ensure the )F* wors and modulates the %AF.

b. There is needed to get more supply air to the building as the supply air is less to what

is designed.

c. There is need to ensure ade0uate return air bac to the AHU for re-circulation.

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