Are you a homeowner or building manager?
Find a Contractor »

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.

MEMBER EXCLUSIVE

Login to access this member exclusive. Not a member? Join now!

What is Wrong With Manual J®?

You might hear that there’s nothing wrong with Manual J®, but you might also hear people complain about it. This group is very adamant about how badly Manual J® oversizes the heating plant requirement. ACCA members can read more from Ed Janowiak here.

MEMBER EXCLUSIVE

Login to access this member exclusive. Not a member? Join now!

Get on the Same Page! The ACCA Residential Plans Examiner Review Form for HVAC System Design

Are you familiar with the ACCA Residential Plans Examiner Review Form for HVAC System Design? If you are not, you might be surprised how much help it can be. ACCA members can learn more here.

MEMBER EXCLUSIVE

Login to access this member exclusive. Not a member? Join now!

The Efficiency of Duct Booster Fans: Do They Work?

Do duct booster fans work? In this article, we will explore the effectiveness of duct booster fans and whether they live up to their promises. Read more in this members-only blog.

MEMBER EXCLUSIVE

Login to access this member exclusive. Not a member? Join now!

Consortium for Energy Efficiency and ACCA

In this blog is an overview of the Consortium for Energy Efficiency (CEE) Summer Program Meeting I recently attended. My main goal was to let program managers from electrical and gas utilities and other industry representatives know what is on the horizon with the electrification hurdles we are seeing and will see with the IRA incentives. Read more in this members-only blog.

Tech Tip: Come On! You Can Just Add a Ton, Can’t You?

We should always avoid oversizing, but it can be even more critical in humid climates where air conditioners operate with a wet coil. However, occasionally, I said yes. But the customer had to agree to a few things first. 

MEMBER EXCLUSIVE

Login to access this member exclusive. Not a member? Join now!

A Place Called Hope

I was at a technical conference recently and I heard the presenter use the word “hope.” Now I’m not a person who will quickly reject the idea of applying hope to a situation or a set of circumstances. But I would also like to think that in the technical environment, it’s not something we would ever rely on. This presenter was talking about one of my favorite topics: heat pumps. Read more in this members-only blog. 

Hey Ed, Is It Better to Size up or Down When It Comes to Ductwork?

Want to learn when you need to size up or down with ductwork? Learn how to keep the velocity down in this edition of “Hey Ed!”

Hey Ed, Do You Like Your Ducts Kinky?

Trying to find out the proper amount of sag when installing ducts? Find out how to use Manual D in this edition of “Hey Ed!”

Hey Ed, What Is the Most Appropriate Velocity Moving Across a Filter Grill?

Want to find the best velocity moving across a filter grill? Find out what Manual D says about velocity in this edition of “Hey Ed!”

Hey Ed, Are There Parts of the Country Where They Have Air So Dry That We Never See Water Collecting in the Drain Pan of the Indoor Coil?

Are there some parts of the country that are so dry they require extra maintenance? Find out about dry sections in this edition of “Hey Ed!”

Hey Ed, What Does Friction Rate Really Stand For?

Want to learn what friction rate really stands for? Find out about the rate of friction in this edition of “Hey Ed!”

Hey Ed, Will a Furnace With a Three-Ton Drive Really Move Three Tons of Air?

Want to learn if a furnace with a three-ton drive can really move three tons of air? Learn more about airflow resistance in this edition of “Hey Ed!”

Hey Ed, Is There a Way to Size a Duct Without Calculating a Friction Rate?

Want to find out how to size a duct without calculating a friction rate? Find out how to use Manual D to calculate in this edition of “Hey Ed!”

Hey Ed, What’s Your Favorite HVAC Tool and Why?

Want to know about Ed’s favorite tool and why? Find out all the benefits of the Digital Hygrometer in this edition of “Hey Ed!”

Hey Ed, What’s the Smallest Size Room That Requires a Supply?

Want to know the smallest room size that requires a supply? Find out to leverage Manual D in this edition of “Hey Ed!”

Hey Ed, What Is the Best Duct Material to Use?

Want to know the best duct material to use? Find out how to choose the best product for profitably in this edition of “Hey Ed!”

Hey Ed, How Often Are Filters Sized Properly?

Want to know how often filters are properly sized? Find out how to make a selection in edition of “Hey Ed!”

Hey Ed, What Is Your Biggest Concern About Twinning Furnaces?

What’s the biggest concern when twinning furnaces? Find out when to switch each fan on in this edition of “Hey Ed!”

Hey Ed, What Is the Most Appropriate Velocity Moving Across a Filter? 

Trying to find the target velocity for moving across a filter? Find out how to find the target velocity gold standard in this edition of “Hey Ed!”

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!”

Looking for an ACCA QA Accredited Contractor?

Are you a homeowner or building manager?

BECOME AN ACCA MEMBER

join now

PLUS It's Risk Free!