Cased Coil Misalignment

By April 26, 2019

Cased Coil Misalignment

On occasion, you will either find a furnace or be tasked with installing a furnace where the coil overlaps the edge of the furnace because the coil is wider. In the case of a Carrier CNPVP coil, you need to ensure that you align the coil according to the manufacturer's specs, or you risk cutting off about 1/3 of the airflow.

The best-case scenario is to use a coil that is a sizer match for the coil, or you can buy or make a tapered metal transition between the furnace and the coil. In the case of the CNPVP, the manufacturer allows the coil to be offset to the left.

In this video, we illustrate replacing a leaking coil and reconfiguring it in the proper orientation.

—Bryan

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Dr. Allison Bailes from Energy Vanguard joins the podcast to answer the age-old question: do houses need to breathe? He also talks about his new book, A House Needs to Breathe… Or Does It? You can purchase that book directly through the Energy Vanguard site at https://energyvanguardstore.com/ or on Amazon.

HVAC professionals can benefit from learning about building science because there is a lot of overlap between the two, and an HVAC technician who knows about building science can set themselves apart in the market.

In short, Dr. Bailes doesn’t think a house needs to “breathe,” especially if a house brings in low-quality air, especially humid air, through gaps and cracks. Some people also use the term “breathe” differently; some may be referring to leakiness, and others may refer to drying out a house. It is necessary for a house to be dry, but we want to make sure that fresh air is controlled.

If you build a home tightly, you have to ventilate it correctly. We have to control air, liquid water, water vapor, and heat. Heat is especially complicated, as it has three different ways of moving and can come in sensitive and latent varieties. One way of controlling those is through control layers like vapor barriers, though these aren’t always needed; we must understand the vapor flow to determine if a vapor barrier is necessary.

Dr. Bailes and Bryan also discuss:

Energy Vanguard’s resources
The chapters of “A House Needs to Breathe… Or Does It?”
IAQ – filtration, humidity control, ventilation, and source control
Challenges with attic air
Dr. Bailes’s book-writing process
The HVACR Training Symposium and other events w/ Dr. Bailes

Keep up with Energy Vanguard, read the blog, and subscribe to the weekly newsletter at https://www.energyvanguard.com/.

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