HVAC Grapevine

February 19, 2024

Join Chris Hughes, Eric Keiser, and Mike Cianfrocco from the popular HVAC Grapevine podcast as they come to you LIVE from the 5th Annual HVAC/R Training Symposium! These expert technicians discuss the latest conference insights, highlight memorable moments from the event, and share their big takeaways. Get an inside look at this major industry gathering through their lively conversation.

Listen in as they reminisce about presenting together in person for the first time, amusing anecdotes from sessions and demos, brushes with HVAC celebrities like Richard Trethewey from This Old House, and more. They’ll also preview upcoming Grapevine guests and plans to expand their content in 2024. Don’t miss this exclusive behind-the-scenes peek at the Symposium from some of the top names in the field!

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Check out our most recent video

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Our latest Podcast

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.

Chris Hughes and Steve Rogers from The Energy Conservatory discuss TEC’s TrueFlow technology and its crucial role in predicting airflow issues in the sales process, particularly for heat pump retrofits. They explain how the TrueFlow app helps contractors accurately measure both static pressure and airflow in existing systems, enabling them to predict whether proposed equipment changes will work effectively. This is especially vital when considering the growing trend of replacing gas furnaces with heat pumps, as the airflow requirements can differ significantly.

The conversation delves into a detailed example of replacing an 80% efficient 48,000 BTU furnace with a heat pump. They demonstrate how the airflow requirement would nearly double from 652 CFM to 1,200 CFM, potentially causing the static pressure to quadruple due to Fan Law 2 principles. This dramatic increase could lead to significant performance issues if not properly addressed during the system design phase. The experts emphasize that using TrueFlow during the sales process allows contractors to identify potential problems and necessary modifications before installation rather than discovering issues during callbacks.

The discussion also covers the ideal workflow for system assessment and sales, starting with customer comfort evaluation and proper load calculations. It’s important to reduce loads through envelope improvements when possible, particularly in cold climates where heat pump retrofits are becoming more common. Proper system sizing often means going smaller rather than larger, contrary to common industry practices, and the worst HVAC systems are often found in expensive custom homes rather than tract housing.

Key Topics Covered:

TrueFlow technology and its role in system forecasting
Fan Law 2 and its impact on static pressure when changing airflow
Heat pump retrofit challenges and considerations
The importance of accurate load calculations
Dual fuel systems as a solution for cold climates
The relationship between airflow and static pressure
Sales process integration of technical measurements
Common issues with oversized equipment
The importance of envelope assessment
Methods for reducing system loads
Proper duct sizing and modification strategies
The role of proper filter sizing and selection
The benefits of flat-rate pricing for duct modifications
Training resources and support available for TrueFlow users

Check out TEC’s YouTube channel at https://www.youtube.com/@energyconservatory, and you can visit TEC’s website at https://energyconservatory.com/.

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.

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Most popular videos

Tips for Cleaning an Air Conditioning Common Drain

Gas Furnace Overview w/ AC Service Tech

Motor Overload and Safeties – Kalos Meeting

A Common Electrical Mistake

5 Traits of Bad HVAC Leaders

Don’t Overfill Refrigerant Recovery Cylinders The Easy Way

How to Replace an AC Condensing Fan Motor

How to Braze Air Conditioning Copper

How to Leak Test an AC With Nitrogen Pressure

How to Properly Pipe a Drain on a Fan Coil

4 Silly Mistakes of The Green HVAC Tech

How to Install an AC Disconnect

Why a Hard Shut Off TXV Closes

The Importance of SST (Evaporator Temperature) and Using a Scale (Kalos Meeting)

Adjusting Gas Pressure on a Standard and Gemini Furnace Valve

How a Heat Pump Reversing Valve Works

Don’t Confuse TD & Delta T

How to Install a Thermostat

How and When to Use a Schrader Core Removal Tool

Why Does The Evaporator Coil Freeze (And How to Diagnose It)

How to Measure Total External Static Pressure (TESP)

Does a TXV Shut under Vacuum?

Prevent this Common Manometer Mistake

Facts About Fusite (Compressor Electrical Pass Through Connections)

See Inside a Biflow/Heat Pump Filter Drier

Flammable Refrigerant Safety Basics – Kalos Meeting

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How is 208 volts different than 230/240 volts?

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How is a 3-Phase Motor Different than Single Phase

HVAC Class 11/24/2020 – Electrical Review

How to Measure Gas Pressure – Kalos Meeting

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Perfect Flares Every Time w/ NAVAC NEF6LM

Ask Bryan Anything Live Call-in from 11/21/2020

How to Build a Sheet Metal Coil Case From Scratch

What Air Filter is The Best?

Basic Electrical Circuit Terms

The #1 Key to Service Success?

How To Keep Motors Running Cool And Efficient

Talk Through The Refrigerant Circuit Using The “Glass Tube” trainer

Top 10 HVAC Tech Tips for 100K

Installing a Rectangle to Round Transition into an Existing Metal Duct

How Humidity Impacts The Weight of Air

Testing Home Pressure Imbalance w/ Genry Garcia (Spanish)

Some of Bryan’s Favorite New Tools Giveaway Meeting

Bert Teaches The Basic Refrigerant Circuit + Safety

Heat Rise Airflow Calculation

LIVE Apprentice Q&A

Setting a Refrigerant Charge by Subcool

The Toxic SUPER TECH Mindset

Soft Skills Can Be Hard (Disciplines of Growth)

Double Crimp Connection

How to Fabricate a Metal Supply Plenum From Scratch

Delivered Capacity Basics – Kalos Meeting

Sequencer Facts – They Aren’t All The Same

Wire Routing & Float Switch Positioning

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