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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.

WEBINAR: HVAC Design Series for Heat Pumps

Join me on May 29 at 12 PM ET for a 1-hour review of the ACCA design series manuals and […]

Hey Ed, Tom Asks About Why Gas Furnaces Are Usually Oversized

Hey Ed, Neel Asks if the Heat Pump System Last 10 Years?

Hey Ed, Neel Asks if It Make Sense to Retrofit a New Build Home With a Conventional 93 AFUE Propane Furnace With a Hybrid Heat Pump System

Hey Ed, Jesus Wants to Learn How to Properly Use His Manual J

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The Big Four in HVACR

It’s no secret that for many years I’ve been talking about four things that we must do to a system that has already been installed. Let’s talk about them!

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The Three Reasons People Hate Me

Last month, we covered the expectations of a few different groups on the results that come from performing a Manual J® calculation. This topic garnered some great responses from members, and one of those comments sparked the idea behind this article. This month, we’ll address how homeowners perceive what we do and how we can move things in our favor. ACCA members can read more here.

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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.

Hey Ed, What Is the Correct Airflow for an AC?

In this edition of “Hey Ed,” Ed talks about the correct airflow for AC.

Hey Ed, What Is the Correct AF on a Fire-Fueled Furnace?

In this edition of “Hey Ed,” Ed talks about the correct air flow for a fire-fueled furnace.

Hey Ed, What Is the Correct CFM per Ton on a Heat Pump?

In this edition of “Hey Ed,” Ed talks about the correct CFM per ton for heat pumps.

Hey Ed, What Is the Most Important Thing to Follow in Manual D?

In this edition of “Hey Ed,” Ed talks about the most important thing to follow in Manual D.

Hey Ed, Why Do We Reduce Trunk Ducts?

In this edition of “Hey Ed,” Ed talks about why we reduce trunk ducts

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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.

Hey Ed, What Is J SHR?

In this edition of “Hey Ed,” Ed talks about what J SHR is.

Hey Ed, Explain the Acceptable Over-Sizing on a Single Stage Two Speed and a VRV Heat Pump.

In this edition of “Hey Ed,” Ed explains if it is acceptable to oversize a Single Stage Two Speed and a VRV Heat Pump

Hey Ed, Explain the Difference Between Condition A and Condition B When Selecting a Heat Pump?

In this edition of “Hey Ed,” Ed discusses the difference between Condition A and Condition B when selecting a heat pump.

Hey Ed, Is There a Difference Between Sizing a Furnace and a Heat Pump?

In this edition of “Hey Ed,” Ed discusses the difference between sizing furnaces and heat pumps.

Hey Ed, Is There a Difference Between Sizing an Air Conditioner and a Heat Pump?

In this edition of “Hey Ed,” Ed discusses the difference between sizing air conditioners and heat pumps.

Hey Ed, What Is the Significant Difference Between a Heat Gain and a Heat Loss in Manual J®?

In this edition of “Hey Ed,” Ed talks about the difference between heat gain and heat loss in Manual J®.

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