In order to understand the foundational principles of duct sizing, a thorough study of ACCA Manual D is a great place to start.

Due to advancements in technology and efficiency and the swelling consumer awareness, ductless equipment continues to be one of the fastest-growing sectors throughout the HVACR industry.

Several months ago, I wrote a Duct Dynasty article titled “Four Steps to Optimize a Duct System.” Since then, I’ve received numerous requests to expand on the simple calculations I mentioned that can help you estimate room airflow with a customer’s input.

Poor ventilation leads to water damage, mold, and other issues in the home that cause respiratory problems, allergies, and other illnesses for the occupants.

If the fact that the latest U.S. Department of Energy (DOE) and Energy Star programs now require a whole-system approach to HVAC installation and maintenance is any indication…

The air duct calculator, or “ductulator,” is a commonly used tool for designing and installing duct systems. Unfortunately, many designers and technicians receive limited instructions on its correct use.

The insulation of ductwork is not always necessary, but there are plenty of situations where it makes sense for HVACR contractors.

Research from the U.S. Department of Energy (DOE) has consistently shown about 30-40 percent of the air traveling through ductwork leaks, and if air is being pulled from somewhere, like a dirty crawlspace, it is going to effect IAQ.

Being accountable for proper airflow delivery causes a tech to examine every portion of an installation differently. Airflow is no longer assumed since test instruments now measure it. Let’s look at some of the most common obstacles to achieving a successful air balance on a residential HVAC system.

These two types of commercial modulating Duct Boosters are for multi-dryer venting through a single duct.