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Capture Hood Guidebook
TABmaster Model 6710
Kanomax USA, Inc. 219 US Highway 206, Andover, NJ 07821 USA
Tel: 1-973-786-6386, Fax: 1-973-786-7586, Email: info@kanomax-usa.com, URL: http://www.kanomax-usa.com
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TAB with the new Kanomax Capture Hood
Testing, Adjusting and Balancing (or TAB), is a process that’s used to measure and adjust the effectiveness of
indoor air systems such as air conditioning and heating. By following the TAB procedure a contractor or
technician can maximize the comfort of a building’s residents or workers as well as the efficiency and life of HVAC
equipment. The process involves a lengthy series of steps but can be summarized briefly by the following
definitions published by NEBB:
Testing is the use of specialized and calibrated instruments to measure temperatures, pressures, rotational
speeds, electrical characteristics, velocities and air and water quantities for an evaluation of equipment and
system performance.
Adjusting is the final setting of balancing devices such as dampers and valves, adjusting fan speeds and pump
impeller sizes, in addition to automatic control devices such as thermostats and pressure controllers to achieve
maximum specified system performance and efficiency during normal operation.
Balancing is the methodical regulation of system fluid flows (air or water) through the use of acceptable
procedures to achieve the desired or specified airflow or water flow.
* Reference: Procedural Standards for Testing Adjust ing Balancing of Environmental Systems, sixth edition, 1998, Published by NEBB
When does TAB need to be performed?
The amount of testing, adjusting and balancing a particular building needs may vary based on the
equipment and complexity of the HVAC system, but there are some general guidelines that can help a
contractor or technician determine if TAB is necessary.
• When a new HVAC system is installed it will need to undergo the TAB process to ensure it is
functioning as intended.
• Any time a building undergoes significant changes due to renovation, construction or a change
in purpose (example: warehouse space is now going to be used for manufacturing).
• Seasonal changes may also prompt a TAB check-up, such as when switching from heat to air
conditioning or vice versa.
KANOMAX TABmaster Capture Hood 6710
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Why is the TAB process important?
The testing, adjusting and balancing process is important for several reasons. It ensures that HVAC equipment
is performing according to specification. It reduces costs by ensuring that heating and cooling are being
performed efficiently, which in turn extends equipment lifetime. It can help a building comply with local energy
conservation requirements. It also ensures the building’s occupants stay comfortable which can increase worker
productivity in a work environment.
What tools are available to help a technician or contractor with the TAB process?
There are many instruments that can be used to measure air flow, temperature and humidity such as
anemometers, thermo hygrometers, or IAQ monitors. The Capture Hood is a popular tool for TAB work because
it can measure the direct air volume rate from a supply or return duct quickly and easily. Hoods come in many
sizes making it easy to choose one that matches the size of the access point the measurement will be performed
at.
The following formula can be used to determine how many air changes are occurring per hour:
Number of Air Changes = (60 x Volumetric flow rate of air in cubic feet per minute) / Volume of the given space
(length x width x height)
Once the number of air changes is known the amount of fresh air being supplied can be determined by multiplying
it by the percentage of outside air (calculated separately). The following chart is from ASHRAE Standard 62,
and lists the recommended volume of fresh air that is needed for many common indoor environments:
Applic ation cfm/person
(outdoor air)
Dining areas
20
Application cfm/person
(outdoor air)
School classroom
12
Kitchens
Hotel/motel rooms
Parking garages 1.5 cfm/ft2
Offices 20
Conference rooms
Public rest rooms
Smoking areas
Retail stores (typical)
Gymnasium
15
15
20
50
60
15
20
KANOMAX TABmaster Capture Hood 6710
School laboratories
Auditoriums/theaters or Libraries
Patient rooms
Health procedure & recovery rooms
Operating rooms
Residential living areas
Residential kitchens
Residential bath
Residential garage 100 cfm/vehicle
20
15
25
15
30
15
25
20
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Kanomax’s TABmaster
Kanomax’s Capture Hood 6710 is the perfect tool for the TAB process; it’slightweight and easy to handle. The full
color screen can be tilted so it’s at the optimal viewing angle at any height. It simultaneously measures and
displays air flow, temperature and humidity with a competitive economic price with professional-grade features:
TABmaster
Model 6710
TM
Capture Hood Model 6710
• 23 to 2500 cfm (40-4250 ㎥/h) range.
• Displays the direction of the airflow as well as the velocity.
• Onboard datalogging records up to 3,000 measurements.
• Advanced storage feature allows you to store multiplemeasurements under
a single ID#.
• Five hood sizes make it easy to pick one that fits your duct size.
• Built-in back pressure compensation ensures accuracy forlarge volumetric
flow measurements.
• Temperature compensation sensor increases accuracy for all airflow
measurements.
• A see-though transparent window allows you to view the duct while
measuring.
KANOMAX TABmaster Capture Hood 6710
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