Flow Hood: How to Properly Balance an HVAC System - HVAC School

Search In:

Event Videos Tech Tips Apps Books Podcasts Users

HVAC Feed
Resources
Content
Courses
Events
Jobs
- Create a Job Post
- Job Posts
Shop
Partners

Search In:

Event Videos Tech Tips Apps Books Podcasts Users

+

Chinese (Simplified)

Subscribe to our Youtube channel

Flow Hood: How to Properly Balance an HVAC System

By Bert Testerman

August 14, 2024

HVAC expert Bert demonstrates how to use a flow hood to properly balance an HVAC system. Watch as he measures and adjusts airflow throughout the house, focusing on the newly installed ductwork and manual dampers.

Key points covered:

Measuring CFM (cubic feet per minute) at each vent
Adjusting manual dampers to balance airflow
Tips for handling oversized systems
Balancing techniques for different room types

This video provides valuable insights for HVAC professionals and homeowners alike, showcasing the importance of proper system balancing for optimal comfort and efficiency.

#airflow #balancing #dampers #ductwork #flow hood #hvac

Comments

To leave a comment, you need to log in.

Most popular videos

Check out our most recent video

How to Evacuate an AC system, Full Vacuum Procedure

Our latest Podcast

HVAC School – For Techs, By Techs

HVAC School – For Techs, By Techs

Real training for HVAC ( Heating, Ventilation, Air Conditioning and Refrigeration) Technicians. Including recorded tech training, interviews, diagnostics and general conversations about the trade.

EER in the Field – Short #231

byBryan Orr

In this short podcast episode, Bryan talks about EER (Energy Efficiency Ratio) and SEER (Seasonal Energy Efficiency Ratio) and how to calculate EER in the field.

EER and SEER are ratings that we often see on equipment (as are SEER2 and EER2) based on a ratio of an output to an input. Whereas coefficient of performance (COP) is a direct ratio of watts out to watts in, EER and SEER account for BTUs and watts. EER and SEER indicate the cooling capacity (in BTUs) we get from the watts we put in.

The ratio changes based on field conditions, and EER2 and SEER2 have more realistic test conditions than EER and SEER (the static pressure for systems rated below 65,000 BTUs per hour was 0.1″wc for EER and SEER, and it is now 0.5″wc for EER2 and SEER2, which is much closer to average field conditions).

To determine EER, you have to figure out BTU production and stack it against your wattage. You’ll need to know your delta enthalpy (delta H), multiply it by the CFM, and then multiply the product of those by 4.5 to get your BTU output. A calculator on apps like measureQuick can help you find out your delta H, but you’ll need a proper wet-bulb temperature before you can do that. You can determine CFM with a TrueFlow grid or manufacturer’s blower charts.

Finding watts can be a challenge with ECMs and inverter-driven systems; it’s not as simple as volts x amps, and you will need a meter that can measure power factor and take readings from the condenser fan, compressor, and blower motor. That wattage becomes the number you divide into BTUs to get the EER. SEER is averaged over a season, HSPF is for heating instead of cooling, and you can convert the BTUs to watts (by multiplying by 3.41) and determine the ratio of watts out to watts in.

Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool.

Purchase your tickets or learn more about the 6th Annual HVACR Training Symposium at https://hvacrschool.com/symposium.

Subscribe to our podcast on your iPhone or Android.

Subscribe to our YouTube channel.

Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android

EER in the Field – Short #231

Search Episodes

EER in the Field – Short #231

02/18/2025

Bryan Orr

Heat Pumps / Comfort and Electrification w/ Copeland

02/14/2025

Bryan Orr

Efficiency and Production on Larger Projects

02/13/2025

Bryan Orr

Q&A – Circuit Board Troubleshooting – Short #230

02/11/2025

Bryan Orr

Are you using AI to Troubleshoot w/ Refrigeration Mentor

02/06/2025

Bryan Orr

The New Sensi Equipment Interface – Short #229

02/04/2025

Bryan Orr

The Buyout Epidemic – Manifesto

01/30/2025

Bryan Orr

Standing Pilot – Short #228

01/28/2025

Bryan Orr

History of Gas Furnaces – Redux

01/23/2025

Bryan Orr

Heat Exchangers and Temperature Rise – Short #227

01/21/2025

Bryan Orr

Search Results placeholder

Check our latest Tech Tips

Inches of Water Column Indirect Soldering Technique Does Air or Nitrogen Absorb Water?

VENOM PACK CONDENSER PURE CONCENTRATE COIL CLEANER

VENOM PACK CONDENSER PURE CONCENTRATE COIL CLEANER
Venom Pack Condenser Cleaner is a high foaming pure concentrate liquid designed to tackle the toughest soils. The proprietary blend of specialty detergents will liquify heavily embedded grease and grime to restore heat transfer and increase the efficiency of the coil.

Viper Condensate Pan and Drain Treatment

Viper Condensate Pan and Drain Treatment
Viper Condensate Pan and Drain Treatment is a sprayable gel. It coats the pan, p-trap and drain piping with a lubricative film to improve flow and prevent future soil adhesion. The slow dissolving enzyme gel will outperform and outlast conventional tablets and strips.

Nylog Blue Gasket -Thread Sealant for AC/R Systems

Nylog Blue Gasket -Thread Sealant for AC/R Systems
One drop of Nylog on your rubber hose gaskets prior to attaching your core tools, hoses or vacuum gauge will assure that things do not bind or leak during evacuation. Derived from refrigeration grade lubricants. Non-hardening, non-drying fluid which bonds tenaciously to many different substrates. Typically, one drop of Nylog can be stretched about three feet before breaking.

NAVAC

Find out more about the Innovative NAVAC line of Vacuum Pumps

NAVAC

FROM AUGUST 2024 TO MARCH 2025 BUY NAVAC TOOLS FOR A CHANCE TO WIN A MOTORCYCLE! Any purchase of NAVAC HVAC Tools is eligible to gain entries for a Grand Prize of a Harley Davidson motorcycle.

loading

To continue you need to agree to our terms.

Terms and Conditions

The HVAC School site, podcast and tech tips
made possible by generous support from

Interested in a HVAC Career?

Find A local trade school

Resources

Calculators
Tool list
Apps
Great Books
Software and Business
Other Resources we like
Unconformed

Content

Start
Podcasts
Videos
Social Media
Tech Tips
Quizzes
Courses

Events

6th Annual HVAC/R Training Symposium
Upcoming Events
Create an Event
Event Partnership

Jobs

Job Posts
Create a Job Post

Partners

Partners
Carrier
Copeland (Emerson)
ESCO Institute
Fieldpiece
NAVAC
Refrigeration Technologies
UEi Test Instruments

Get Tech Tips

Subscribe to free tech tips

Email Address

First Name

Terms and conditions & Privacy Policy
EULA
Reuse License

©2025 - HVAC School | All rights reserved