Can that existing fossil fuel duct system handle increased air flow? A duct system designed for an atmospherically vented gas furnace was built to carry 600 cfm, a 3-ton heat pump may require 1200 cfm. If duct modifications are not made the heat pump will under underperform, or maybe not at all. This session will focus on applying fan laws and measuring existing static and airflow measurements to determine what, if any duct modifications need to be made. In addition, the session will focus on lowering duct system pressure drops by changing out key duct work components.
Learning Objectives:
By attending this session, attendees will:
Understand the 3 fan laws and their role in the appraisal of existing duct system
Understand how to use existing static and airflow measurements to help determine id duct modifications will be needed
Understand how switching out key duct work components can lower static pressure, increase fan flow and decrease fan energy use
