Ductwork - Exterior Exposes

Overview

The extent and impact of the duct-related thermal losses depends directly on the location of the ductwork. For ducts located entirely within the conditioned space, any thermal losses go directly to the conditioned space. The greatest thermal losses and related energy penalties occur when ducts are located entirely outside of the building envelope. Factors affecting thermal losses and energy penalties of exterior ducts include leakage and conduction losses, direct solar radiation effects and solar reflection effects.

In this course the student will learn about the results of a study in which a building underwent a retrofit project involving additional insulation and a highly reflective coating applied to the roof and ducts. As part of this project, methods were developed to analyze the air distribution system effectiveness independent of the introduction of outside air through an outside air damper. A simplified model was developed to predict the effectiveness and efficiency of the distribution system.

The student is expected to read and review the material contained in Exterior Exposed Ductwork: Delivery Effectiveness and Efficiency, LBNL, April 1998, DOE Contract No. DE-AC03-76SF00098.

The student must take a multiple-choice quiz consisting of fifteen (15) questions at the end of this course to obtain PDH credits.

 

Specific Knowledge or Skill Obtained

This course teaches the following specific knowledge and skills:

• Duct-related thermal losses
• Delivery effectiveness and efficiency
• Thermal comfort issues and the effect of a roof retrofit
• Methods to analyze the air distribution system effectiveness

 

Course

Click on the following link to the PDF document to review the course material before taking the quiz for credit.

Ductwork - Exterior Exposed

 

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This course applies to:

• Alabama (P.E.) • Alaska (P.E.) • Arkansas (P.E.) • Florida (P.E.) (AOP) • Georgia (P.E.) • Illinois (P.E.) • Iowa (P.E.) • Kansas (P.E.) • Kentucky (P.E.) • Louisiana (P.E.) • Maine (P.E.) • Minnesota (P.E.) • Mississippi (P.E.) • Missouri (P.E.) • Montana (P.E.) • Nebraska (P.E.) • Nevada (P.E.) • New Hampshire (P.E.) • New Mexico (P.E.) • New York (P.E.) • North Carolina (P.E.) • North Dakota (P.E.) • Ohio (P.E.) • Oklahoma (P.E.) • Oregon (P.E.) • South Carolina (P.E.) • South Dakota (P.E.) • Tennessee (P.E.) • Texas (P.E.) • Utah (P.E.) • West Virginia (P.E.) • Wyoming (P.E.)

Abbreviations:

AOP-Areas of Practice

LAR-Laws & Rules

P.E.-Professional Engineers

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