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Author: Ed Janowiak

Ed Janowiak is ACCA's Manager of HVAC Design Education and can be reached at ed.janowiak@acca.org or 703-824-8878.

Hey Ed, Is a Gas Furnace More Efficient Than a Heat Pump?

Wondering if a gas furnace is more efficient than a heat pump? Find out the difference between economics and efficiency in this edition of “Hey Ed!”

Hey Ed, Should I Put in a Heat Pump?

Should you install a Heat Pump? Learn about the advantages and benefits of heat pumps in this edition of “Hey Ed!”

Hey Ed, Is It Permissible to Put a Return in the Bathroom? 

Is it permissible to put a return in the bathroom? Find out why it’s not in this edition of “Hey Ed!”

Hey Ed, What Is This Change in Enthalpy Malarkey You Were Mumbling About?

Want find out how to determine the change in enthalpy? Learn more about how to determine cooling capacity in this edition of “Hey Ed!”

Hey Ed, Should Duct Be Added to an Undersized Supply to Reduce Static Pressure?

Want to learn how to reduce state pressure on an undersized supply? Learn how to add an additional duct in this edition of “Hey Ed!”

Hey Ed, How Are Intermittent Loads, such as a Range Hood, Accounted for in Manual J®?

Want to learn how to account for range hood loads in Manual J? Learn how to approach load ventilation in this edition of “Hey Ed!”

Hey Ed, How Does an Electronic Thermostat Work?

Want to familiarize yourself with how an electronic thermostat works? Learn how an electronic thermostat detects temperature in this edition of “Hey Ed!”

Hey Ed, How Do You Measure a House for a Load Calculation?

Want to learn how to measure a house for a load calculation? Learn how to measure block loads in this edition of “Hey Ed!”

Hey Ed, When Do You Use Solvent?

When do you use solvent? Find out the proper way to use solvent in the edition of “Hey Ed!”

Hey Ed, What’s the Difference Between Manual J® and Manual JAE®?

In this edition of “Hey Ed”, Ed goes over the differences between Manual J and Manual JAE, and their intended uses.

Hey Ed, What’s the Deal With Big Hoses?

Curious about what size you need for different pipe sizes? Learn how to determine and calculate hose size in this edition of “Hey Ed!”

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Static Pressure Measurements and the Truth

Ed Janowiak conducts a series of static pressure tests regarding static tip and coil placement. Read about Ed’s results in this blog.

Hey Ed, Is It Possible to Hold a 500-Micron Vacuum on a Line Set if There Is Moisture in the System?

Wondering if a system can hold a 500-micron vacuum of there’s moisture in the system? Learn when a system can hold a vacuum in this edition of “Hey Ed!”

Hey Ed, What’s the Difference Between Sensible Heat Ratio and Sensible Heat Factor?

Wondering what the difference between sensible heat ratio and sensible heat factor is? Learn how to use Manual S to find out in this edition of “Hey Ed!”

Hey Ed, What’s the Main Problem When We Make up a Friction Rate?

What’s the main problem when we make up a friction rate. Learn more about determining adequate airflow in this edition of “Hey Ed!”

Hey Ed, Why Is Manual S® Your Favorite Manual?

Why is Manual S® Ed’s favorite manual? Learn about the importance of residential equipment selection in this edition of “Hey Ed!”

Hey Ed, Can We Use the Acronym ECM to Describe All Electronically Commutated Motors?

How do you describe electronically commutated motors Learn the difference between a constant torque and a constant air-flow in this edition of “Hey Ed!”

Hey Ed, What Is the Difference Between Taking Static Pressure Measurements on a New Versus Existing System?

In this edition of “Hey Ed”, Ed discusses the difference between taking static pressure measurements on a new versus existing […]

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Solving the Solvent Conundrum

Have you ever considered flushing your line sets? Or are you currently? In this month’s blog, we will cover some options that will determine when to make pigs fly.

Hey Ed, What Can I Do if I Cannot Find the Filter’s Performance Data?

What should you do if you can’t find the filter’s performance data? Find out what to do and in this edition of “Hey Ed!”

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