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Posted by udarrell on January 24, 2007, 7:00 pm
Magnusfarce wrote:
>What guidelines are there for ducting replacement along with a new
>residential HVAC system? This is a small (1300 sq ft) home in Southern
>California that's about 30 years old. It has the original HVAC system and
>all the attic ducting is original as well. The ducting appears to be made
>of the same flexible, corrogated aluminum that the dryer uses, but larger
>and wrapped in about 2 inches of fiberglass insulation. There are no
>obvious leaks or gaps, but the AC system does not seem very efficient (duh,
>30 years old), so I might be losing some of my heating.cooling that way.
>
>The installer strongly suggests replacement, and common sense says this
>probably a good idea, but this would add a considerable amount to the total
>system cost. I definitely don't want to do it myself.
>
>What are the appropriate materals, etc. for a modern residential attic duct
>system, and can anyone make a guess at a reasonable cost for reducting the
>house? (All of it is in the attic, and there is good access to everything
>up there. There are eight vents in the house, and the heater assembly is in
>the middle area of the house. Pretty typical stuff, I would guess.)
>
>Gratitude in advance for any advice. - Magnusfarce
>
>
http://www.udarrell.com/proper_cfm_btuh_duct_sizing_air_conditioning_systems.html
Call a number of HVAC contractors for estimates.
- udarrell
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