What Were They Thinking?
September 07, 2008
Here are a couple of those situations where, as home performance professionals, we scratch our heads and ask, What were they thinking?
Rocket Scientist Not Required
It doesn’t take a rocket scientist, or an HVAC engineer, to figure out one problem with the HVAC forced-air duct installation in the Phoenix, Arizona, home shown in the diagram (see Figure). The owner complained about high cooling bills and uncomfortable conditions in the front rooms. A quick look in the attic revealed a large part of the problem.
Note that one of two trunks runs from the air handler to the northwest area. From there the trunk was split to serve the northwest and west rooms. At the first split, another duct was directed all the way to the front of the home. It’s little wonder that losses in the unnecessarily long duct run reduced air flow in the home’s front rooms. A better alternative would have been to run a third trunk from the air handler to serve the front rooms.
Proper design and installation of the HVAC duct system is critical to energy- efficient performance and occupant comfort.&...
To read complete online articles, you need to sign up for an Online Subscription.
Once an order has been placed there is an automatic $10 processing fee that will be deducted with any cancellation.
The Home Energy Online articles are for personal use only and may not be printed for distribution. For permission to reprint, please send an e-mail to firstname.lastname@example.org.